Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2018-07-15

Journal: OCEAN ENGINEERING

Included Journals: SCIE

Volume: 160

Page Number: 389-396

ISSN: 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.