Graphic summary
  • Show / hide key
  • Information


Scientific and technological production
  •  

1 to 50 of 60 results
  • Impact comminution of solids due to local kinetic energy of high shear strain rate: II-Microplane model and verification

     Caner, Ferhun Cem; Bazant, Zdenek P.
    Journal of the mechanics and physics of solids
    Date of publication: 2014-03-01
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The new theory presented in the preceding paper, which models the dynamic comminution of concrete due to very high shear strain rate, is now compared to recent test data on the penetration of projectiles through concrete walls of different thicknesses, ranging from 127 to 254 mm. These data are analyzed by an explicit finite element code using the new microplane constitutive model M7 for concrete, which was previously shown to provide the most realistic description of the quasi-static uni-, bi- and tri-axial test data with complex loading path and unloading. Model M7 incorporates the quasi-static strain rate effects due viscoelasticity and to the rate of cohesive crack debonding based on activation energy of bond ruptures, which are expected to extend to very high rates. Here model M7 is further enhanced by apparent viscosity capturing the energy dissipation due to the strain-rate effect of comminution. The maximum shear strain rates in the computations are of the order of 10(5) s(-1). The simulations document that, within the inevitable uncertainties, the measured exit velocities of the projectiles can be matched quite satisfactorily and the observed shapes of the entry and exit craters can be reproduced correctly. (C) 2014 Published by Elsevier Ltd.

    The new theory presented in the preceding paper, which models the dynamic comminution of concrete due to very high shear strain rate, is now compared to recent test data on the penetration of projectiles through concrete walls of different thicknesses, ranging from 127 to 254 mm. These data are analyzed by an explicit finite element code using the new microplane constitutive model M7 for concrete, which was previously shown to provide the most realistic description of the quasi-static uni-, bi- and tri-axial test data with complex loading path and unloading. Model M7 incorporates the quasi-static strain rate effects due viscoelasticity and to the rate of cohesive crack debonding based on activation energy of bond ruptures, which are expected to extend to very high rates. Here model M7 is further enhanced by apparent viscosity capturing the energy dissipation due to the strain-rate effect of comminution. The maximum shear strain rates in the computations are of the order of 10(5) s(-1). The simulations document that, within the inevitable uncertainties, the measured exit velocities of the projectiles can be matched quite satisfactorily and the observed shapes of the entry and exit craters can be reproduced correctly. (C) 2014 Published by Elsevier Ltd.

  • Impact comminution of solids due to local kinetic energy of high shear strain rate: I. Continuum theory and turbulence analogy

     Bazant, Zdenek P.; Caner, Ferhun Cem
    Journal of the mechanics and physics of solids
    Date of publication: 2014-03-01
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The modeling of high velocity impact into brittle or quasibrittle solids is hampered by the unavailability of a constitutive model capturing the effects of material comminution into very fine particles. The present objective is to develop such a model, usable in finite element programs. The comminution at very high strain rates can dissipate a large portion of the kinetic energy Of an impacting missile. The spatial derivative of the energy dissipated by comminution gives a force resisting the penetration, which is superposed on the nodal forces obtained from the static constitutive model in a finite element program. The present theory is inspired partly by Grady's model for expansive comminution due to explosion inside a hollow sphere, and partly by analogy with turbulence. In high velocity turbulent flow, the energy dissipation rate gets enhanced by the formation of micro-vortices (eddies) which dissipate energy by viscous shear stress. Similarly, here it is assumed that the energy dissipation at fast deformation of a confined solid gets enhanced by the release of kinetic energy of the motion associated with a high-rate shear strain of forming particles. For simplicity, the shape of these particles in the plane of maximum shear rate is considered to be regular hexagons. The particle sizes are assumed to be distributed according to the Schuhmann power law. The condition that the rate of release of the local kinetic energy must be equal to the interface fracture energy yields a relation between the particle size, the shear strain rate, the fracture energy and the mass density. As one experimental justification, the present theory agrees with Grady's empirical observation that, in impact events, the average particle size is proportional to the (-2/3) power of the shear strain rate. The main characteristic of the comminution process is a dimensionless number B-a (Eq. (37)) representing the ratio of the local kinetic energy of shear strain rate to the maximum possible strain energy that can be stored in the same volume of material. It is shown that the kinetic energy release is proportional to the (2/3)-power of the shear strain rate, and that the dynamic comminution creates an apparent material viscosity inversely proportional to the (1/3)-power of that rate. After comminution, the interface fracture energy takes the role of interface friction, and it is pointed out that if the friction depends on the slip rate the aforementioned exponents would change. The effect of dynamic comminution can simply be taken into account by introducing the apparent viscosity into the material constitutive model, which is what is implemented in the paper that follows. (C) 2013 Elsevier Ltd. All rights reserved.

    The modeling of high velocity impact into brittle or quasibrittle solids is hampered by the unavailability of a constitutive model capturing the effects of material comminution into very fine particles. The present objective is to develop such a model, usable in finite element programs. The comminution at very high strain rates can dissipate a large portion of the kinetic energy Of an impacting missile. The spatial derivative of the energy dissipated by comminution gives a force resisting the penetration, which is superposed on the nodal forces obtained from the static constitutive model in a finite element program. The present theory is inspired partly by Grady's model for expansive comminution due to explosion inside a hollow sphere, and partly by analogy with turbulence. In high velocity turbulent flow, the energy dissipation rate gets enhanced by the formation of micro-vortices (eddies) which dissipate energy by viscous shear stress. Similarly, here it is assumed that the energy dissipation at fast deformation of a confined solid gets enhanced by the release of kinetic energy of the motion associated with a high-rate shear strain of forming particles. For simplicity, the shape of these particles in the plane of maximum shear rate is considered to be regular hexagons. The particle sizes are assumed to be distributed according to the Schuhmann power law. The condition that the rate of release of the local kinetic energy must be equal to the interface fracture energy yields a relation between the particle size, the shear strain rate, the fracture energy and the mass density. As one experimental justification, the present theory agrees with Grady's empirical observation that, in impact events, the average particle size is proportional to the (-2/3) power of the shear strain rate. The main characteristic of the comminution process is a dimensionless number B-a (Eq. (37)) representing the ratio of the local kinetic energy of shear strain rate to the maximum possible strain energy that can be stored in the same volume of material. It is shown that the kinetic energy release is proportional to the (2/3)-power of the shear strain rate, and that the dynamic comminution creates an apparent material viscosity inversely proportional to the (1/3)-power of that rate. After comminution, the interface fracture energy takes the role of interface friction, and it is pointed out that if the friction depends on the slip rate the aforementioned exponents would change. The effect of dynamic comminution can simply be taken into account by introducing the apparent viscosity into the material constitutive model, which is what is implemented in the paper that follows. (C) 2013 Elsevier Ltd. All rights reserved.

  • Microplane constitutive model M4L for concrete. I: Theory

     Tue, Nguyen Viet; Li, Jiabin; Caner, Ferhun Cem
    Computers & structures
    Date of publication: 2013
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The present, Part I, of this two-part study presents a new microplane constitutive model for simulating the fracture and damage behavior of concrete materials subjected to various loadings. The concept of stress-strain boundaries (strain-dependent yield limits) is used to describe the inelastic behavior of concrete. To facilitate the constitutive formulation, the relation between the microplane strain components and the macroscopic strain tensor is firstly identified. A new concept of confinement-adjusted effective microplane tangential moduli is introduced. Based on the material experiment observations and physical concepts, some novel microplane stress-strain boundaries are developed. A new numerical algorithm for calculating the microplane stress components is also presented. The validation of the new model against experimental data will be presented in the second part of this study.

    The present, Part I, of this two-part study presents a new microplane constitutive model for simulating the fracture and damage behavior of concrete materials subjected to various loadings. The concept of stress–strain boundaries (strain-dependent yield limits) is used to describe the inelastic behavior of concrete. To facilitate the constitutive formulation, the relation between the microplane strain components and the macroscopic strain tensor is firstly identified. A new concept of confinement-adjusted effective microplane tangential moduli is introduced. Based on the material experiment observations and physical concepts, some novel microplane stress–strain boundaries are developed. A new numerical algorithm for calculating the microplane stress components is also presented. The validation of the new model against experimental data will be presented in the second part of this study.

  • Microplane constitutive model M4L for concrete. II: Calibration and validation

     Li, Jiabin; Tue, Nguyen Viet; Caner, Ferhun Cem
    Computers & structures
    Date of publication: 2013
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    This paper, Part II of a two-part study, presents the numerical calibration and validation of the microplane constitutive model M4L for concrete formulated in the preceding part. The model parameters are firstly calibrated through optimum fitting of typical basic material test data. Then the model is verified through comparing the numerical simulation results with a second large group of experiment data in the literature. The simulated experiments include tension, compression and shear as well as their various combinations. Close agreement between the numerical predictions and a very broad range of test data is found. Finally the model is implemented into a commercial finite element package and is applied to nonlinear structural analysis. Several complex but commonly encountered problems in the engineering practice are computationally investigated. The model predictions are in good agreement with the test observations.

  • Comminution of solids caused by kinetic energy of high shear strain rate, with implications for impact, shock, and shale fracturing

     Bazant, Zdenek Pavel; Caner, Ferhun Cem
    Proceedings of the National Academy of Sciences of the United States of America
    Date of publication: 2013-11-26
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    Although there exists a vast literature on the dynamic comminution or fragmentation of rocks, concrete, metals, and ceramics, none of the known models suffices for macroscopic dynamic finite element analysis. This paper outlines the basic idea of themacroscopic model. Unlike static fracture, in which the driving force is the release of strain energy, here the essential idea is that the driving force of comminution under high-rate compression is the release of the local kinetic energy of shear strain rate. The density of this energy at strain rates <1,000/s is found to exceed themaximum possible strain energy density by orders of magnitude, making the strain energy irrelevant. It is shown that particle size is proportional to the -2/3 power of the shear strain rate and the 2/3 power of the interface fracture energy or interface shear stress, and that the comminution process is macroscopically equivalent to an apparent shear viscosity that is proportional (at constant interface stress) to the -1/3 power of this rate. A dimensionless indicator of the comminution intensity is formulated. The theory was inspired by noting that the local kinetic energy of shear strain rate plays a role analogous to the local kinetic energy of eddies in turbulent flow.

  • Microplane model M7for fiber reinforced concrete

     Caner, Ferhun Cem; Bazant, Zdenek Pavel; Wendner, Roman
    Engineering fracture mechanics
    Date of publication: 2013-06-01
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    Model M7f is a new model for fiber reinforced concretes under static and dynamic loads, which features two kinds of improvement over the earlier versions: (1) It is built on M7, a new, greatly improved, microplane model for plain concrete; and (2) it includes a more realistic description of the fiber pullout and breakage. The former include: (a) the absence of volumetric deviatoric split of elastic strains, which eliminates excessive lateral expansions or contractions and stress locking in far post-peak extensions; (b) simulation of the differences between hydrostatic compression and uniaxial compression under rigid lateral confinement; and (c) high shear dilatancy of low strength concretes; and realistic description of unloading, reloading and load cycles, even if they cross between tension and compression. The latter includes an improved continuous dependence of the effect of fibers on the fiber volume fraction. The fiber resistance is a function of the strain representing the average opening of cracks of given spacing and, as in model M5f, a horizontal plateau as a function of the type of fiber and fiber volume fraction has been employed and used systematically for all fits. In this study, this horizontal plateau is justified using uniformly distributed crack bridging fibers. The model behavior is calibrated and verified by fitting of the main test data from the literature. The match of experimental observations and the computational results is closer than in the previous models.

    Model M7f is a new model for fiber reinforced concretes under static and dynamic loads, which features two kinds of improvement over the earlier versions: (1) It is built on M7, a new, greatly improved, microplane model for plain concrete; and (2) it includes a more realistic description of the fiber pullout and breakage. The former include: (a) the absence of volumetric deviatoric split of elastic strains, which eliminates excessive lateral expansions or contractions and stress locking in far post-peak extensions; (b) simulation of the differences between hydrostatic compression and uniaxial compression under rigid lateral confinement; and (c) high shear dilatancy of low strength concretes; and realistic description of unloading, reloading and load cycles, even if they cross between tension and compression. The latter includes an improved continuous dependence of the effect of fibers on the fiber volume fraction. The fiber resistance is a function of the strain representing the average opening of cracks of given spacing and, as in model M5f, a horizontal plateau as a function of the type of fiber and fiber volume fraction has been employed and used systematically for all fits. In this study, this horizontal plateau is justified using uniformly distributed crack bridging fibers. The model behavior is calibrated and verified by fitting of the main test data from the literature. The match of experimental observations and the computational results is closer than in the previous models.

  • Microplane model M7 for plain concrete: I formulation

     Caner, Ferhun Cem; Bazant, Zdenek Pavel
    Journal of engineering mechanics
    Date of publication: 2013-11-16
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    Mathematical modeling of the nonlinear triaxial behavior and damage of such a complexmaterial as concrete has been a long-standing challenge in which progress has been made only in gradual increments. The goal of this study is a realistic and robust material model for explicit finite-element programs for concrete structures that computes the stress tensor from the given strain tensor and some history variables. Themicroplanemodels, which use a constitutive equation in a vectorial rather than tensorial form and are semimultiscale by virtue of capturing interactions among phenomena of different orientation, can serve this goal effectively. This paper presents a new concrete microplane model, M7, which achieves this goal much better than the previous versions M1-M6 developed at Northwestern University since 1985. The basic mathematical structure of M7 is logically correlated to thermodynamic potentials for the elastic regime, the tensile and compressive damage regimes, and the frictional slip regime. Given that the volumetric-deviatoric (V-D) split of strains is inevitable for distinguishing between compression failures at low and high confinement, the key idea is to apply the V-Dsplit only to the microplane compressive stress-strain boundaries (or strain-dependent yield limits), the sumof which is compared with the total normal stress from the microplane constitutive relation. This avoids the use of the V-D split of the elastic strains and of the tensile stress-strain boundary, which caused various troubles in M3-M6 such as excessive lateral strains and stress locking in far postpeak uniaxial extension, poor representation of unloading and loading cycles, and inability to represent high dilatancy under postpeak compression in lower-strength concretes. Moreover, the differences between high hydrostatic compression and compressive uniaxial strain are accurately captured by considering the compressive volumetric boundary as dependent on the principal strain difference. [...] © 2013 American Society of Civil Engineers.

  • Recent progress in microplane modelling of plain concrete

     Caner, Ferhun Cem; Bazant, Zdenek Pavel
    International Conference on Computational Plasticity Fundamentals and Applications
    Presentation's date: 2013-09
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    Despite determined efforts in mathematical modelling of multiaxial behaviour of plain concrete by many researchers, the existing models have not achieved a full description of this complex behaviour. Among these models, the microplane models have contributed important advances in the semi-multiscale modelling of multiaxial behaviour of concrete since their inception in the early 80s. Among several versions of microplane models for plain concrete, model M4 had the greatest success in modelling both the rate-dependent dynamic and quasistatic multiaxial behaviours of concrete. Yet, some problems still have persisted, such as (1) a spurious lateral contraction under uniaxial tension, and (2) an unrealistic damage prediction in tension. These problems resulted from the difficulty in reconciling the pressure sensitive ductile behaviour in compression of concrete with its brittle tensile behaviour. A new microplane model, called M7 as a successor to the earlier microplane models for plain concrete, overcomes the aforementioned problems while retaining all of its compressive data fitting prowess. The volumetric-deviatoric split, required in the previous modelling of the pressure sensitive compressive behaviour of concrete, is now removed from the elastic strains under both compression and tension, but retained in the formulation of compressive stress-strain boundaries (i.e, strain-dependent yield limits on the generic microplane). This allows the simulation of a much more realistic tensile behaviour including the correct damage (loading/unloading slope) and correct lateral contraction. It also means that a new compressive normal boundary is needed. It is defined in terms of the existing deviatoric and volumetric boundaries, which preserves the versatility of the model in fitting a wide range of experimental data...

  • Microplane model M7 for plain concrete: II. Calibration and verification

     Caner, Ferhun Cem; Bazant, Zdenek Pavel
    Journal of engineering mechanics
    Date of publication: 2012-11-16
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The microplane material model for concrete, formulated mathematically in the companion paper, is calibrated by material test data from all the typical laboratory tests taken from the literature. Then, the model is verified by finite-element simulations of data for some characteristic tests with highly nonuniform strain fields. The scaling properties of model M7 are determined. With the volumetric stress effect taken from the previous load step, the M7 numerical algorithm is explicit, delivering in each load step the stress tensor from the strain tensor with no iterative loop. This makes the model robust and suitable for large-scale finite-element computations. There are five free, easily adjustable material parameters, which make it possible to match the given compressive strength, the corresponding strain, the given hydrostatic compression curve, and certain triaxial aspects. In addition, there are many fixed, hard-to-adjust parameters, which can be taken to be the same for all concretes. The optimum values of material parameters are determined by fitting a particularly broad range of test results, including the important tests of compression-tension load cycles, mixed-mode fracture, tension-shear failure of double-edge-notched specimens, and vertex effect when axial compression is followed by torsion. Because of the lack of information on the material characteristic length or fracture energy, which can be obtained only by size effect tests on the same concrete, and on the precise boundary conditions and precise gauge locations, the finiteelement fitting of the present test data can hardly be expected to give better results than single-point simulations of specimens with approximately homogeneous strain states within the gauge length. Nevertheless, tensile test data with severe localization are delocalized on the basis of assumed material length. Model M7 is shown to fit a considerably broader range of test data than the preceding models M1- M6. © 2013 American Society of Civil Engineers.

    The microplane material model for concrete, formulated mathematically in the preceding Part I, is here calibrated by material test data from all the typical laboratory tests taken from the literature. Then the model is verified by finite elements simulations of data for some characteristic tests with highly nonuniform strain fields. The scaling properties of model M7 are determined. With the volumetric stress effect taken from the previous load step, the M7 numerical algorithm is explicit, delivering in each load step the stress tensor from the strain tensor, with no iterative loop. This makes the model robust and suitable for large-scale finite element computations. There are 5 free, easily adjustable material parameters, which make it possible to match the given compressive strength, the corresponding strain, the given hydrostatic compression curve, and certain triaxial aspects. Besides, there are many fixed, hard-to-adjust, parameters, which can be taken the same for all concretes. The optimum values of material parameters are determined by fitting a particularly broad range of test results, including the important tests of compression-tension load cycles, mixed-mode fracture, tension-shear failure of double-edge-notched specimens, and vertex effect when axial compression is followed by torsion. Because of the lack of information on the material characteristic length or fracture energy, which can be obtained only by size effect tests on the same concrete, and on the precise boundary conditions and precise gauge locations, the finite element fitting of the present test data can hardly be expected to give better results than single-point simulations of specimens with approximately homogeneous strain states within the gauge length. Nevertheless, tensile test data with severe localization are delocalized on the basis of assumed material length. Model M7 is shown to fit a considerably broader range of test data than the preceding models M1–M6.

  • Multiscale simulation of fracture of braided composites via repetitive unit cells

     ¿milauer, V.; Hoover, Christian G.; Bazant, Zdenek P.; Caner, Ferhun Cem; Waas, Anthony M; Shahwan, Khaled W.
    Engineering fracture mechanics
    Date of publication: 2011-04
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    Two-dimensional triaxially braided composites (2DTBCs) are attractive in crashworthiness design because their fracture can dissipate a significantly larger amount of impact energy than other light-weight materials. This paper aims at predicting the fracture energy, Gf, and the effective length of the fracture process zone, cf, of 2DTBC composites. Since the fracture parameters are best manifested in the scaling properties and are the main parameters in the size effect law, the nominal strengths of three geometrically similar notched beams of three different sizes are simulated in a 3D finite element framework. The simulations are run for three different bias tow angles: 30º, 45º and 60º. Continuum beam elements in front of the notch are replaced with repetitive unit cells (RUCs), which represent the 2DTBC’s mesostructure, and are located in the region of potential cracking. Multiscale simulations, incorporating damage mechanics, are used to predict the pre- and post-peak response from three-point bending tests. Nominal stresses are calculated from the predicted peak loads and used to fit the size effect law. The dimensionless energy release rate function g(a) is determined from the J-integral. The values of Gf and cf are then determined using g(a) and the size effect law. With some exceptions, the results in general match well with the results of size effect experiments, and particularly the strong size effect observed in the tests.

  • Fibre-matrix interaction in the human annulus fibrosus

     Guo, Z.Y.; Shi, Xiaojuan; Peng, X.; Caner, Ferhun Cem
    Journal of the mechanical behavior of biomedical materials
    Date of publication: 2011-09-13
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Effect of imperfections on elastic stiffness of polymers reinforced with long aligned single-walled carbon nanotubes

     Valero, Ignacio; Caner, Ferhun Cem; Guo, Z.Y.
    Journal of Nanomechanics and Micromechanics
    Date of publication: 2011-06-14
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Microplane model for fracturing damage of triaxially braided fiber-polymer composites

     Caner, Ferhun Cem; Bazant, Zdenek P.; Hoover, Christian G.; Waas, Anthony M; Shahwan, Khaled W.
    Journal of engineering materials and technology. Transactions of the ASME
    Date of publication: 2011-04
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    A material model for the fracturing behavior for braided composites is developed and implemented in a material subroutine for use in the commercial explicit finite element code ABAQUS. The subroutine is based on the microplane model in which the constitutive behavior is defined not in terms of stress and strain tensors and their invariants but in terms of stress and strain vectors in the material mesostructure called the "microplanes". This is a semi-multiscale model, which captures the interactions between inelastic phenomena such as cracking, splitting, and frictional slipping occurring on planes of various orientations though not the interactions at a distance. To avoid spurious mesh sensitivity due to softening, the crack band model is adopted. Its band width, related to the material characteristic length, serves as the localization limiter. It is shown that the model can realistically predict the orthotropic elastic constants and the strength limits. More importantly, the present model can also fit the tests of size effect on the strength of notched specimens and the post-peak behavior, which have been conducted for this purpose. When used in the ABAQUS software, the model gives a realistic picture of the axial crushing of a braided tube by a divergent plug.

  • Microplane model M6f for fiber reinforced concrete

     Caner, Ferhun Cem; Bazant, Zdenek P.
    International Conference on Computational Plasticity Fundamentals and Applications
    Presentation's date: 2011
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Mechanical behaviour of transversely isotropic porous neo-hookean solids

     Guo, Z.Y.; Caner, Ferhun Cem
    International Journal of Applied Mechanics
    Date of publication: 2010-03
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Scaling of strength of metal-composite joints-part i: experimental investigation

     Caner, Ferhun Cem
    Journal of applied mechanics. Transactions of the ASME
    Date of publication: 2010-01
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Size effect on strength of laminate-foam sandwich plates: Finite element analysis with interface fracture

     Caner, Ferhun Cem; Bazant, Zp
    Composites Part B: Engineering
    Date of publication: 2009-07
    Journal article

     Share Reference managers Reference managers Open in new window

  • Meso-mechanical analysis of the fracture of concrete specimens in mixed mode

     Rodrígez, Mariana; Lopez Garello, Carlos Maria; Carol Vilarasau, Ignacio; Caner, Ferhun Cem
    International Conference on Computational Plasticity Fundamentals and Applications
    Presentation's date: 2009-09
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    This paper describes recent numerical simulation results of some experiments carried out by Nooru-Mohamed to study mixed mode fracture of concrete. The numerical simulation is based on a meso-mechanical model developed in the group of Mechanics of Materials UPC, which represents the largest aggregate particles explicitly, and represent cracks in a discrete manner by inserting zero-tickness interface elements in all potential crack trajectories a priori of the analysis.

  • On constitutive modelling of porous neo-Hookean composites

     Guo, Zy; Caner, Ferhun Cem; Peng, Xq; Moran, B
    Journal of the mechanics and physics of solids
    Date of publication: 2008-06
    Journal article

     Share Reference managers Reference managers Open in new window

  • Inverse procedure for the parameter identification of the microplane material model

     Deliktas, B.; Caner, Ferhun Cem; Ornek, M.
    Modelling of Heterogenenous Materials
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Microplane model for soft tissue

     Caner, Ferhun Cem; Carol Vilarasau, Ignacio
    Modelling of Heterogenenous Materials
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Microplane model for biological soft tissue

     Caner, Ferhun Cem; Carol Vilarasau, Ignacio
    International Conference on Computational Plasticity
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Hyperelastic Anisotropic Microplane Constitutive Model of Annulus Fibrosus

     Caner, Ferhun Cem; Guo, Z.Y.; Moran, B.; Bazant, Z.P.; Carol Vilarasau, Ignacio
    Journal of biomechanical engineering. Transactions of the ASME
    Date of publication: 2007-10
    Journal article

     Share Reference managers Reference managers Open in new window

  • Microplane model M5f for multiaxial behavior and fracture of fiber-reinforced concrete

     Beghini, A; Bazant, Z P; Zhou, Y; Gouirand, O; Caner, Ferhun Cem
    Journal of engineering mechanics
    Date of publication: 2007-01
    Journal article

     Share Reference managers Reference managers Open in new window

  • On Hyperelastic Constitutive Modeling of Annulus Fibrosus

     Caner, Ferhun Cem; Carol Vilarasau, Ignacio
    World Congress of Biomechanics
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Microplane Constitutive Model and Computational Framework for Blood Vessel Tissue

     Caner, Ferhun Cem; Carol Vilarasau, Ignacio
    Journal of biomechanical engineering. Transactions of the ASME
    Date of publication: 2006-06
    Journal article

     Share Reference managers Reference managers Open in new window

  • Size effect on strength of laminate-foam sandwich plates

     Bazant, Zdenek P.; Zhou, Y.; Daniel, I. M.; Caner, Ferhun Cem; Yu, Qinglin
    Journal of engineering materials and technology. Transactions of the ASME
    Date of publication: 2006-07
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • 2005SGR-00842. Grup de Geotècnia i Mecànica de Materials

     Alonso Pérez de Agreda, Eduardo; Carol Vilarasau, Ignacio; Gens Sole, Antonio; Josa Garcia-tornel, Alejandro; Ledesma Villalba, Alberto; Lloret Morancho, Antonio; Olivella Pastalle, Sebastian; Prat Catalan, Pere; Romero Morales, Enrique Edgar; Chen, Guangjing; Lopez Garello, Carlos Maria; Caner, Ferhun Cem; Vaunat, Jean; Zhan, Zhifeng; Arnedo Gaute, Diego; Ciancio, Daniela; Garolera Vinent, Daniel; Idiart Castellano, Andrés Enrique; Jacinto, Abel Carlos; Levatti, Hector Ulises; Montenegro, Iván Óscar; Pineda, Jubert Edgar; Ortega Iturralde, Francisco; Pinyol Puigmarti, Nuria Merce; Samat Aon, Sergio Luis; Segura Serra, Josep Maria; Caballero Jurado, Antonio; Berdugo de Moya, Ivan Rafael; Di Mariano, Alessandra; Hoffmann Jauge, Christian; Muñoz, Juan Jorge; Oldecop, Luciano; Arroyo Alvarez de Toledo, Marcos
    Participation in a competitive project

     Share

  • Microplane Model for Blood Vessel Tissue

     Caner, Ferhun Cem; Carol Vilarasau, Ignacio
    II International Conference on Computational Bioengineering
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Microplane model for biological soft tissue

     Caner, Ferhun Cem; Carol Vilarasau, Ignacio
    2005 Joint ASCE/ASME/SES Conference on Mechanics and Materials
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Microplane model m5 with kinematic and static constraints for concrete fracture and anelasticity. I : Theory

     Caner, Ferhun Cem
    Journal of engineering mechanics
    Date of publication: 2005-01
    Journal article

     Share Reference managers Reference managers Open in new window

  • Microplane model m5 with kinematic and static constraints for concrete fracture and anelasticity II: computation

     Caner, Ferhun Cem
    Journal of engineering mechanics
    Date of publication: 2005-01
    Journal article

     Share Reference managers Reference managers Open in new window

  • Modelling studies to simulate mechanical behavior of concrete

     Murat, Orken; Caner, Ferhun Cem; Delikatas, Babur
    CREATING THE FUTURE - 3rd FAE International Symposium
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Fracturing Material Models Based on Micromechanical Concepts: Recent Advances

     Caner, Ferhun Cem
    The fifth international conference on fracture mechanics of concrete and concrete structures
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Beton Mekanik Davranisinin Mikromekanik Yaklasimla Sayisal Olarak Modellenmesi (Computational modeling of mechanical behavior of concrete)

     Murat, Ornek; Caner, Ferhun Cem
    International congress on advances in civil engineering 6th
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Informe del primer año

     Caner, Ferhun Cem
    Date: 2004-06
    Report

     Share Reference managers Reference managers Open in new window

  • TYPES OF INTERFACES AND PHYSICAL PHENOMENA

     Carol Vilarasau, Ignacio; Xavier, Oliver; Caner, Ferhun Cem; Segura, Josep M
    Date: 2003-04
    Report

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Vertex effect at rotating principal axes in strain-softening concrete

     Caner, Ferhun Cem; Bazant, Z P; Cervenka, J
    Date of publication: 2002-04-30
    Book chapter

     Share Reference managers Reference managers Open in new window

  • Lateral confinement needed to suppress softening of concrete in compression

     Caner, Ferhun Cem
    Journal of engineering mechanics
    Date of publication: 2002-12
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Vertex effect in strain-softening concrete at rotationg principal axes

     Caner, Ferhun Cem
    Journal of engineering mechanics
    Date of publication: 2002-01
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Vertex effect and confinement of fracturing concrete via microplane model M4

     Caner, Ferhun Cem
    Fracture Mechanics of Concrete Structures 4 (FraMCoS-4)
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Vertex Effect and Confinement of Fracturing Concrete via Microplane Model M4

     Bazant, Zdenek P.; Caner, Ferhun Cem; Cervenka, J.
    Fracture Mechanics of Concrete Structures 4 (FraMCoS-4)
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Brief description of the activities at the Institut de Tecniques Energetiques of the UPC

     Sempau Roma, Josep; Arnold Arias, Delia; Blasco Argente, Vicente-pablo; Blazquez Perez, Sonia Margarita; Camacho Garcia, Antonia; Caner, Ferhun Cem; Duch Guillen, Maria Amor; Ginjaume Egido, Merce; Koubychine Merkulov, Youri Alexandrovich; Llorca Pique, Jordi; Martinez Rovira, Immaculada; Roig Costa, Maria; Serrano Carreño, Maria Isabel; Shvedunov, Vasily Ivanovich; Toll Escobedo, Agustin; Valles Murciano, Maria Isabel; Vargas Drechsler, Arturo
    Date: 2000-03
    Report

     Share Reference managers Reference managers Open in new window