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EACY - Enhanced accuracy computational and experimental framework for strain localization and failure mechanisms

Total activity: 5
Type of activity
Competitive project
Acronym
EACY
Funding entity
Gobierno de España. Ministerio de Educación y Ciencia (Mec)
Funding entity code
MAT2013-48624-C2-1-P
Amount
49.387,76 €
Start date
2014-01-01
End date
2016-12-31
Abstract
The aim of the project is to develop, implement and validate an integral computational and experimental framework for the enhanced accuracy modeling
of strain localization and failure mechanisms. The model must encompass elasto-plastic, elasto-damaging and elasto-plastic-damaging materials and be
applicable to mode I, II and III fracture.
THE MAIN SCIENTIFIC GOALS EXPECTED FROM THE PROJECT ARE:
1. To provide a consistent link between the different models used in engineering and material science to model fracture, at continuum, discrete and
computational levels.
2. To upgrade the understanding of strain localization and failure mechanisms by providing an integrated framework to serve as a common ground for
them.
3. To push the state of the art knowledge on modeling of material failure, including the incompressible behavior.
4. To push the state of the art knowledge on stabilized mixed finite element formulations for Computational Mechanics.
5. To perform monitored strain localization experimental tests with simultaneous visualizing techniques (load, strain field, overall displacement,
temperature measurement...)
6. To deepen in the understanding of strain localization processes, and the influence of the material and relevant process parameters (e.g. rotation
speed, pressure force and advancing speed for FSW)
7. To gain understanding on the physical phenomena underlying strain localization both in fracture related events and in shear band formation in hot
forming and materials processing (dynamic recrystallization, size of shear band, grain and dislocation structure)
THE OBJECTIVES OF THE PROJECT ARE:
1. The formulation, development and validation of a next generation of predictive methods for strain localization and failure based on new mixed
(strain/pressure/displacement) mathematical models and efficient computational procedures,
3. The extension and validation of the integral EACY framework to account for the major prototype constitutive models (elasto-plasticity, elasto-damage
and combinations of these, and rigid-plasticity),
4. The application of the EACY framework for predicting the risk of failure in modes I, II and III and mixed modes.
5. The application of the EACY framework to sheet metal fracture and FSW,
6. The implementation of experimental tests relevant for localization phenomena validation with special emphasis on strain localization visualization,
7. The understanding of localization phenomena in the selected processes to enhance the knowledge of the inner operating processes,
8. The development of new knowledge in the field of adiabatic shear banding.
The main outcome of the project will be a formulation, methods and codes for the computational modeling of strain localization and failure mechanics,
encompassing the most relevant kinematical and constitutive assumptions used in engineering sciences and practice. These will have enhanced stress
accuracy compared to the existing computational methods and will be experimentally validated, allowing for reliable predictive capabilities.

Participants

Scientific and technological production

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