A mixed stabilized finite element formulation for strain localization analysis
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This work exploits the concept of stabilization techniques to improve the behaviour of either mixed or pu/mixed u/εlinear/linear triangular elements when strain localization analysis is required. Different stabilization methods suitable for either Mode-I or Mode-II structural failure are proposed and compared to check the global stability of the corresponding discrete finite element formulation. Both elasto-J2-plastic and isotropic damage models have been used for the constitutive behaviour of the material. In both cases, exponential softening has been introduced in the post-peak regime. The results obtained do not suffer from spurious mesh-size or mesh-bias dependence, comparing very favorably with those obtained with standard approach.
CitacióChiumenti, M.; Cervera, M.; Agelet De Saracibar, C. A mixed stabilized finite element formulation for strain localization analysis. A: Pan-American Congress of Applied Mechanics. "11th Pan-American Congress of Applied Mechanics, PACAM XI: January 04-08, 2010, Foz do Iguaçu, Paraná, Brazil: proceedings". Foz do Iguaçu, Paraná: 2010, p. 1-6.