Transactions of JWRI Paper Information

Trans. JWRI, Vol. 29 (2000), No. 2, pp. 77-83.

A Model to Estimate the Ductile Crack Growth in Metallic Materials with Node Release Technique Using Potential

Jianxun ZHANG and Hidekazu MURAKAWA


     A model in which the micro-void mechanics and macro-fracture mechanics are combined is proposed to estimate the ductile crack growth in metallic materials. A node release technique using a potential function is employed in the proposed finite element method. J-integral, far from the crack tip, is taken as a fracture parameter and the criterion of node releasing is described in terms of fracture strain and stress triaxiality near the crack tip. The ductile crack growth and the influential factors are investigated numerically for three-point bend specimens. The predicted curves of J-integral versus crack-extension show good agreements with the experimental measurements.

KEY WORDS: Ductile Crack Growth, J-Integral, Finite Element Simulation



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