An analytical model for necking strains in stretched plates under dynamic biaxial loading

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:200

Article

Jacques, N.¹ 

[1] IRDL, ENSTA Bretagne, UMR CNRS 6027, 2 Rue Francois Verny, F-29806 Brest 9, France

关键词: Necking;    Inertia;    Two-zone model;    Dynamic biaxial loading;    Plastic flow localisation;    Forming limits;   

DOI  :  10.1016/j.ijsolstr.2020.05.028

来源: Elsevier

【 摘 要 】

A model for the prediction of localised necking in plates subjected to dynamic biaxial loading is presented. The proposed model extends the classic two-zone localisation analysis introduced by Marciniak and Kuczynski (1967) to include the contribution of inertia. Several examples of computations are presented to illustrate the influence of inertia, material rate-dependence and yield surface shape on plate necking under dynamic biaxial loading. It is found that inertia may significantly delay the occurrence of localised necking and increase the apparent ductility of the material. The results of the proposed model are compared to those of three-dimensional finite element simulations and a very good agreement is observed. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

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