Improvement of the Adjustable Localization Operator identification based on the confined plasticity zone shape for multiaxial elasto-plastic cyclic predictions

Ewann Gautier , Bruno Levieil (1) , Sylvain Calloch (1) , Anthony Ezanno , Cédric Doudard (1)

1 IRDL - Institut de Recherche Dupuy de Lôme

Simplified methods for elasto-plastic calculations are a cost and time savings solution to obtain mechanical state at the notch tip. The Adjustable Localization Operator (ALO) method has been proven to be a robust and inherently multiaxial method. This study aims to propose an alternative strategy for identifying its parameters. The principal idea is to consider the shape of the confined plastic zone in order to adapt the various parameters of the adjustable localization operator. The proposed approach has been validated on notched structures with plane strain assumption as well as on a new design structure for multiaxial proportional and non-proportional loadings. The results obtained have shown the interest of considering the shape of the confined plastic.

Mots clés: Elastoplasticity; Plasticity; Structural design

Domaines: Mécanique [physics.med-ph]

Ewann Gautier, Bruno Levieil, Sylvain Calloch, Anthony Ezanno, Cédric Doudard. Improvement of the Adjustable Localization Operator identification based on the confined plasticity zone shape for multiaxial elasto-plastic cyclic predictions. International Journal of Solids and Structures, 2023, 262-263, pp.112077. ⟨10.1016/j.ijsolstr.2022.112077⟩. ⟨hal-03937365⟩