EXPERIMENTAL RESEARCH ON DUCTILE FRACTURE CRITERIA IN METAL FORMING
A ductile fracture criterion is a key parameter in material forming limitation. Accuracy predicting surface and internal failure in plastic deformation process affects greatly on the technology design of workpiece and die. Tension, compression, torsion and shearing tests on 45＃ steel are utilized for providing the experimental values of the critical values at fracture, and 11 widely used ductile fracture criteria are selected to simulate the physical experiments and their relative accuracy for predicting and quantifying fracture initiation sites are investigated. The results show that metal forming process under high triaxiality can be estimated successively using both Normalized Cockcroft-latham and the Brozzo ductile fracture criteria, but the Ayada and general Rice-Tracey models work very well for the low triaxiality cases.
ductile fracture criteria metal forming process material experiment stress triaxiality
Song Yu Wei-ming Feng
Department of Engineering Mechanics, School of Civil Engineering,Shandong University, Jinan 250061
国际会议
南京
英文
333-335
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）