A comparison of triangle and quadrangle finite elements for large strain elastoplastic formulations

in Proceedings of ACOMEN’2008, Advanced Computational Methods in Engineering (2008)

The paper presents a comparative study of different elastoplastic large strain formulations used in research groups in Mendoza and Li`ege. The comparison is focused on a few academic standardized problems ... [more ▼]

The paper presents a comparative study of different elastoplastic large strain formulations used in research groups in Mendoza and Li`ege. The comparison is focused on a few academic standardized problems, in particular necking of a cylindrical bar in tension. Stress distribution at necking section, as well as load histories are analyzed for all three formulations. Two other test cases consider bending of the so-called ”Greco” beam and upsetting of a cylinder. Numerical results show that all approaches yield very similar results and thus are equally valid. Furthermore, quadratic 6-noded triangles provide a good alternative to bilinear quadrangles, even if sometimes they appear to be more sensitive to big distorsions. [less ▲]

A Quasi-Coulomb Model for Frictional Contact Interfaces

in Idelsohn, S.; Onate; Dvorkin (Eds.) Proceedings of "World Congress on Computational Mechanics IV (1998)