A study of fracture criteria for ductile materials

✍ Scribed by T.L Weng; C.T Sun

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 828 KB
• Volume: 7
• Category: Article
• ISSN: 1350-6307
• DOI: 10.1016/s1350-6307(99)00010-2

✦ Synopsis

In order to establish a ductile fracture criterion, several potential fracture parameters were investigated by comparing numerical simulations of crack extension with available experimental data. Based on the comparison, a fracture criterion, the Global-Local Fracture Criterion (GLFC), was proposed. The J-integral is employed as a global parameter to characterize the initial stage of crack extension. In the subsequent steady state crack growth, the fracture criterion is switched to a local parameter characterizing the crack tip stress or strain. The accuracy of the proposed fracture criterion in predicting ductile fracture behavior was veri®ed.