Open Access

ARTICLE

Modeling the Axial Splitting and Curling of Metal Tubes under Crush Loads

W.Xu¹, A.M. Waas²

1 University of Michigan, Ann Arbor, MI, USA.
2 University of Washington, Seattle, WA, USA.

Computers, Materials & Continua 2015, 46(3), 165-194. https://doi.org/10.3970/cmc.2015.046.165

Abstract

Plastic deformation and splitting are two important mechanisms of energy dissipation when metal tubes undergo axial crushing. Isotropic J2 plasticity theory combined with a failure criterion is used to model axial splitting and curling of metal tubes undergoing axial crush. The proposed material model is implemented within a finite element (FE) framework using the user material subroutine VUMAT option available in the commercial code ABAQUS. Experimental results from literature are used to validate the model. The predicted splitting and curling patterns as well as the load-displacement response agree well with the experimental observations. The present material model is also used to predict the number of axial cracks in splitting the tube.

---

Keywords

---