Summary of Comparison Between Experimental and Analytical (Including Empirical) Results for Initiation of Crack Growth for Surface Cracks

摘要

Surface-cracked specimens are used to simulate the behavior of structures containing defects. For these ferritic steel specimens the test temperatures of 255 and 297 K corresponded to the the lower shelf and the lower region of the ductile-brittle transition curve, respectively. Therefore, the conditions tested ranged from elastic to elastic-plastic to fully plastic with only small changes in tensile properties but substantial changes in fracture toughness. This paper compares experimental results based on crack initiation for the surface-cracked specimens with predictions of J/sub Ic/ and on an empirical correlation using the flow stress. 15 refs., 11 figs., 5 tabs. (ERA citation 13:005996)