ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 6

Monitoring Fatigue Crack Propagation in Compact Tension Specimens via Remote Sensing of Back Face Strain

Simha, KRY
Assistant professor and principal research scientist, Indian Institute of Science, Bangalore,

Hande, HSS
Graduate student, Michigan Technological University, Houghton, MI

Arora, PR
Assistant professor and principal research scientist, Indian Institute of Science, Bangalore,

(Received 10 December 1991; accepted 29 May 1992)

Abstract

Back face strain (BFS) measurement is now well-established as an indirect technique to monitor crack length in compact tension (CT) fracture specimens [1,2]. Previous work [2] developed empirical relations between fatigue crack propagation (FCP) parameters. BFS, and number of cycles for CT specimens subjected to constant amplitude fatigue loading. These predictions are experimentally validated in terms of the variations of mean values of BFS and load as a function of crack length. Another issue raised by this study concerns the validity of assigning fixed values for the Paris parameters C and n to describe FCP in realistic materials.

Keywords:
fatigue crack propgation (FCP), back face strain (BFS), mean load, compact tension (CT)

Paper ID: JTE11734J
DOI: 10.1520/JTE11734J
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