A study on the performance of ductile failure models under different range of stress triaxiality states with experimental validation

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Amaral, Rui^1 ; Teixeira, Pedro^2 ; Azinpour, Erfan^1 ; Santos, Abel D.^1,2 ; De Sá, J. César^1,2

INEGI, Institute of Science and Innovation in Mechanical and Industrial Engineering, R. Dr. Roberto Frias, 400, Porto

4200-465, Portugal^1

FEUP, Faculty of Engineering, University of Porto, R. Dr. Roberto Frias, Porto

4200-465, Portugal^2

关键词: Damage parameter;    Ductile failures;    Experimental test;    Experimental validations;    Inverse analysis;    Johnson-Cook;    Loading condition;    Stress triaxiality;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032122/pdf
DOI  :  10.1088/1742-6596/734/3/032122

来源: IOP

【 摘 要 】

In this work, experimental tests were carried out, under different loading conditions, in order to assess different ductile failure criteria, namely based on GTN, Johnson-Cook or Lemaitre models and to establish new proposals for improvement. Corresponding characterization for damage parameters is performed by an inverse analysis procedure, using reference experimental tests. Numerical simulations of a cross-shaped component are considered for the damage models, and results show a similar trend related with the experimental fracture evidence.