Analysis of shear ductile damage in forming processes using a micromechanical model with void shape effects. (1st July 2022)

• Record Type: Journal Article
• Authors: Tajdary, Pouya; Morin, Léo; Romero-Resendiz, Liliana; Gorji, Maysam B.; Braham, Chedly; Gonzalez, Gonzalo
• Is Part Of: International journal of solids and structures. Volume 248(2022)
• Publication Date: 2022-07-01
• Subjects: Ductile failure -- Shear-dominated loadings -- Deep drawing -- Corrugation processing -- Void shape effects; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2022.111640
• Languages: English
• ISSNs: 0020-7683

Abstract

Abstract: The aim of this work is to investigate and predict ductile failure in forming processes. Experimental results of deep drawing and corrugation processing on aluminum alloys suggest that in some cases failure can be due to shear-dominated loadings. In order to simulate numerically failure during forming, we use the micromechanical Madou–Leblond model, which permits to account for void shape effects that are important under shear loadings. In the case of deep drawing, the model is able to reproduce failure either due to bottom or shear cracks, depending on the processing conditions. In the case of corrugation processing, the model reproduces accurately the occurrence of failure as well as the crack shape. Comparisons with the GTN model show the importance of void shape effects upon failure. Highlights: Ductile failure in forming processes is predicted using a Gurson-type model with void shape effects. Locations of cracks observed in experiments of deep drawing and RCS are reproduced by the model. In shear-dominated loadings, the model predicts failure due to important void shape effects. Classical Gurson model does not predict softening in presence of shear.