Fatigue Crack Propagation Test using Multiply Edge-Cracked Speciemns

Abstract

Fatigue crack propagation tests were carried out using multiply edge-cracked speciemns. The specimen was machined to have 19 edge notches at intervals of 10mm. The specimen was then fatigue pre-cracked by eccentric tension-compression loading. Four pre-cracked specimens were prepared. Fatigue crack propagation tests for 2 specimens were performed by eccentric tension-compression loading, while those were performed by 4-point bending loading for the other specimens. COnsequently the multiple cracks tend to propagate selectively in the end.