✦ LIBER ✦

An improvement of CTOD criterion for ductile fracture

✍ Scribed by Wei Hua Tai

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 344 KB
Volume: 41
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(92)90176-f

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✦ Synopsis

In this paper a relationship between the critical crack tip opening displacement (CTOD) at crack initiation S,, and the stress triaxiality a,,,/6 is derived based on the damage mechanics criterion for ductile fracture, and a modified crack tip parameter 6: and a modified CTOD criterion are proposed. Critical CTOD, &, and newly modified CTOD, a:, are calculated and compared with some relative experimental data. The results show that the calculated 6,, values are in agreement with the measured ones, and the present crack tip parameter 6: may be approximately considered as a material constant independent of specimen geometry and loading condition.

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