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Indexed by:期刊论文

Date of Publication:2018-07-15

Journal:OCEAN ENGINEERING

Included Journals:SCIE

Volume:160

Page Number:389-396

ISSN No.:0029-8018

Key Words:Crack opening stress; Maximum crack opening displacement; Center cracked tension specimen; Finite element analysis; Crack growth

Abstract:A new approach is proposed to determine crack opening stress (COS) on the basis of the variable quantity of maximum crack opening displacement (VMCOD). Based on elastic-plastic finite element analysis of center cracked finite plate, and accounting for the effects of crack geometry size, stress R-ratio, Young's modulus, yield stress and strain hardening, the explicit expression of relationship between COS and VMCOD is presented. This method avoids adopting parameters around crack tip and also is applicable to large-scale yielding state. Further studies show this relationship could be applied to predict crack growth rates, which correlate well with experimental results.