Integration of elasto-plastic constitutive models infinite deformation: an explicit approach
Author
Monforte, L.; Arroyo, M.; Gens, A.; Carbonell, J.M.
Type of activity
Presentation of work at congresses
Name of edition
XIII International Conference on Computational Plasticity: Fundamentals and Applications
Date of publication
2015
Presentation's date
2015-09
Book of congress proceedings
Computational Plasticity XIII: fundamentals and applications: XIII International Conference on Computational Plasticity – Fundamentals and Applications: Barcelona, Spain: september 1-3, 2015: proceedings
This paper highlights an explicit integration scheme for hyperelastic-based finite strains elasto-plastic models. One step update equations are obtained from the large deformation multiplicative elasto-plastic theory, where an exponential variation of the plastic deformation gradient is assumed. The material tangent matrix has the same formal structure as the usual small strains elasto-plastic tangent matrix. The basic algorithm to perform the stress integration, including an adaptive substeppin...
This paper highlights an explicit integration scheme for hyperelastic-based finite strains elasto-plastic models. One step update equations are obtained from the large deformation multiplicative elasto-plastic theory, where an exponential variation of the plastic deformation gradient is assumed. The material tangent matrix has the same formal structure as the usual small strains elasto-plastic tangent matrix. The basic algorithm to perform the stress integration, including an adaptive substepping scheme and a yield violation drift correction scheme, are also described. The accuracy and robustness of the proposal is assessed against several examples
of typical geotechnical tests. Results from a convergence test suggest that, using an adaptive substepping scheme, the error of the local problem is independent of the step size.
This paper highlights an explicit integration scheme for hyperelastic-based finite strains elasto-plastic models. One step update equations are obtained from the large deformation multiplicative elasto-plastic theory, where an exponential variation of the plastic deformation gradient is assumed. The material tangent matrix has the same formal structure as the usual small strains elasto-plastic tangent matrix. The basic algorithm to perform the stress integration, including an adaptive substepping scheme and a yield violation drift correction scheme, are also described. The accuracy and robustness of the proposal is assessed against several examples of typical geotechnical tests. Results from a convergence test suggest that, using an adaptive substepping scheme,the error of the local problem is independent of the step size.
Citation
Monforte Vila, Lluís [et al.]. Integration of elasto-plastic constitutive models infinite deformation: an explicit approach. A: COMPLAS XIII. "COMPLAS XIII : proceedings of the XIII International Conference on Computational Plasticity : fundamentals and applications". Barcelona: CIMNE, 2015, p. 398-406.