Transactions of Materials and Heat Treatment

Title：Research on ductile fracture criterion in plastic deformation processes

Authors： YU Song1 FENG Wei-ming1 WANG Rong2(1.School of Civil Engineering Shandong University Ji'nan 250061 China 2.Department of Engineering Management Shandong Urban Construction Vocational College Ji'nan 250014 China)

Unit：

KeyWords： ductile fracture criteria metal forming process stress triaxiality

ClassificationCode：TG113.25

year,vol(issue):pagenumber：2010,35(1):121-124

Abstract：

Ductile fracture criterion is a key parameter in material forming limitation.Accuracy predicting surface and internal failure in plastic deformation process affect greatly the technology design of workpiece and die.Tension,compression,torsion and shearing test on 45 steel were utilized for providing the experimental values of the critical values at fracture,and 11 kinds of usually used ductile fracture criterions were selected to simulate the physical experiments and their relative accuracy for predicting and quantifying fracture initiation sites was investigated.The comparing 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 model work very well for the low triaxiality cases.

Funds：

国家自然科学基金资助项目(50875156)

Reference：

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