Effect of specimen configurations on the fracture resistance curve Original Research Article

An experimental study on the constraint effect of fracture resistance curve (J–R curve) caused by specimen size variation was carried out with base metal of SA515 Gr. 60 carbon steel and SA516 Gr. 70 carbon steel and SA240 TP304 stainless steel and weld metal of SA516 Gr. 70 carbon steel and SA312 TP347 stainless steels. The resulting J–R curve increased with increasing plane size and decreased with increasing crack length. The test results show that the effects of plane size and crack length were significant, however, the effects of specimen thickness and size were trivial.