1983 Volume 69 Issue 9 Pages 1183-1189
Analyses of the date obtained from the instrumented impact test and of its correlation with static and dynamic J integral values and various tensile properties are made in this study.
It is shown that a dynamic bending yield load recorded in the instrumented Charpy V test can be easily converted to a dynamic tensile yield stress using Server's equation. It is also possible to estimate a true fracture strain, COD value, and SZW easily if the load point displacement is recorded. Temperature dependency of Charpy V energy and J integral values is rather well simulated by a curve fitting method. However, a half value transition temperture obtained in that method has no physical meaning. Dynamic JId is larger than a static JIc in the ductile fracture range in this study. This rise is proportional to the yield stress ratioσ yd/σ y (1.2 -1.3). It is found, therefore, that the following relation exists in the both cases; JI/ σ y = 1. 6COD. Correlation between the fracture toughness and tensile properties proposed by Hahn and Rosenfield shows a good result, but ROLFE-NOVAK'S equation on the impact value gives a poor one.