SEDL / STP / STP1244-EB / STP14638S

Application of the Gurson Model to Ductile Tearing Resistance

Brocks, W
Fraunhofer Institute for Mechanics of Materials (IWM), Freiburg,

Klingbeil, D
Federal Institute for Materials Research and Testing (BAM), Berlin,

Künecke, G
Federal Institute for Materials Research and Testing (BAM), Berlin,

Sun, D-Z
Fraunhofer Institute for Mechanics of Materials (IWM), Freiburg,

Pages: 21    Published: Jan 1995

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Abstract

Compared with conventional fracture mechanics concepts, constitutive equations which account for local damage of the material have the advantage that the corresponding material parameters for ductile fracture can be transferred between different specimen geometries. They will hence be able to describe the physical effect of constraint on the tearing resistance in a natural way. The paper shows the capabilities of the GURSON model in predicting JR-curves for different specimen geometries under static and dynamic loading with one set of material parameters. It is shown how these parameters can be determined from the numerical simulation of simple tensile tests. Problems and open questions are discussed and perspectives for future applications are given.