Hits:

Indexed by:期刊论文

Date of Publication:2001-10-01

Journal:Journal of Materials Science and Technology

Included Journals:Scopus、EI

Volume:17

Issue:SUPPL.

Page Number:S73-S76

ISSN No.:10050302

Abstract:An artificial wedge to retard the fatigue crack growth in tension has been investigated. The results show that an artificial wedge can reduce the growth rate of fatigue crack on surface fatigue crack and, the fatigue crack growth behavior in the depth direction is essentially similar to that in the width direction. Based on the theoretical analysis, a model for the effective crack growth parameter   Keff is presented. It is shown that the relationship between the calculated   Keff value and crack speed are almost the same as those of cracked specimens without a wedge. Therefore, this model can be applied to the estimate retardation behavior.