Algorithm Study of Gradual Fracture of Ductile Metallic Material with Finite Element Method

Acta Metall Sin

2008, Vol. 44

Issue (4): 489-494 DOI:

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Algorithm Study of Gradual Fracture of Ductile Metallic Material with Finite Element Method

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西北工业大学航空学院

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;. Algorithm Study of Gradual Fracture of Ductile Metallic Material with Finite Element Method. Acta Metall Sin, 2008, 44(4): 489-494 .

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Abstract In order to simulate the gradual expansion of the crack in ductile material which should take the affect of elastic-plastic and geometric nonlinearity into account, the EWK damage model was used as the fracture criterion to instead of stress intensity factors or J integral theory in this paper. Let this criterion be a subroutine of ABAQUS’ main program and kept the two in real time communication in finite element algorithm. When some elements was met the fracture criterion in subroutine, let the Young’s modulus of these elements be “zero” in main program to simulate physical fracture. One kind of Newton method which was suit for localized unstable problems was used in this algorithm. Taking the tensile fracture of a rectangular sheet with a elliptical hole in its center as an example, A numerical result is obtained. The result shows that the effect of the fracture is according to the actual physical phenomena and the path of fracture is consistent with the prediction of analytical solution.

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Received: 05 September 2007

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