APPLICATION OF A GTN DAMAGE MODEL TO PREDICT THE FRACTURE OF METALLIC SHEETS SUBJECTED TO DEEP-DRAWING

作者：Kami Abdolvahed^*; Mollaei Dariani Bijan; Sadough Vanini Ali; Comsa Dan Sorin; Banabic Dorel

来源：Proceedings of the Romanian Academy - Series A: Mathematics, Physics, Technical Sciences, Information Science , 2014, 15(3): 300-309.

• deep-drawing
• fracture
• GTN Damage model
• anisotropy

In this paper, an anisotropic formulation of the Gurson-Tvergaard-Needleman (GTN) damage model is used for simulating the deep-drawing of a rectangular box made from an AA6016-T4 metallic sheet. The model is implemented as a VUMAT routine in the ABAQUS/Explicit finite-element code. The material parameters involved in the constitutive relationships are determined by means of an identification procedure that combines the response surface methodology (RSM) and the simulation of a uniaxial tensile test. In order to assess the predictive performances of the GTN model, different levels of the blank-holding force are assumed in the finite-element analysis of the deep-drawing process. The comparison between the numerical results and experimental data shows not only a good accuracy of the fracture predictions, but also the capability of the GTN model to provide a realistic description of the material response during the whole forming process.

• 出版日期2014-9