Open Access

ABSTRACT

Numerical Simulation of Ductile Fracture Process including Shear-Lip Fracture

M. Kikuchi¹, S. Sannoumaru²

1 Dept. Mech. Engng., Tokyo University of Science , Japan
2 Graduation School of Tokyo University of Science, Japan

The International Conference on Computational & Experimental Engineering and Sciences 2007, 1(3), 99-104. https://doi.org/10.3970/icces.2007.001.099

Abstract

Thickness effect is studied experimentally. At free surface of the specimen, shear lip fracture pattern appears, though dimple fracture pattern is observed inside of the specimen. The area of shear-lip fracture changes due to the change of the specimen thickness. In this study, experimental study is conducted by changing specimen thicknesses. Fracture surfaces are precisely observed using SEM, and dimple patterns on them are observed. At the free surface, very narrow no-void area is observed. By using FRASTA technique, dimple fracture process is simulated. It is found that shear-lip fracture appears after dimple fracture process. FEM simulation is carried out using Gurson's constitutive equation. It is found that shear-lip type fracture is simulated near free surface area by this method. The results show similar tendency with the experimental observation.

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