单试样三点柔度法测金属材料J_R曲线及其条件起裂值

The Measurement of J-resistance Curves and Their Proof Values at Crack Initiations with Unloading Compliance at Three Positions Using Single Specimen

在单试样卸载柔度法及单试样三曲线法基础上 ,提出了一种更简便的测定金属材料 JR曲线及其条件起裂值的单试样三点柔度法 ,并用该方法测定了 1Cr1/2 Mo钢、16Mn R钢和 WCF 62钢的 JR曲线及其条件起裂值 ,与标准的多试样法相比 。

Based on the method of three curves and unloading compliance,a simple new method is proposed for measuring J resistance curves of metallic materials.The measurment of J resistance curves and their proofs values at crack initiations were carried out using 1Cr1/2Mo、WCF62 and 16MnR steels.The results of the single specimen are in agreement with those of the standard multi specimen method.The errors are within the allowable range in engineering.