Evaluating fatigue crack propagation properties using miniature specimens
Journal
International Journal of Fatigue
Journal Volume
43
Pages
105-110
Date Issued
2012
Author(s)
Abstract
Standard fatigue crack propagation (FCP) test placed strict requirement on specimen size. FCP rate in subsize specimen was found to be slightly but consistently slower than that in the standard specimens. Based on a critical study on two aluminum alloys and two steels, we found the lower rates can be attributed to the plane stress state in the miniature specimens being different from that in the standard specimens. By taking account of crack closure, the miniature specimen data are brought in line with the standard specimen results and may serve as an upper bound estimate of FCP properties. © 2012 Elsevier Ltd. All rights reserved.
Type
journal article