一种单试样测定J积分阻力曲线的新方法

A new method for measuring J resistence curves of metallic materials from single specimen

在单试样三曲线法及卸载柔度法基础上，提出了一种新的简便的单试样测定金属材料Ｊ积分阻力曲线及条件起裂值的方法和步骤．并用该方法测定了１Ｃｒ１／２Ｍｏ 钢、１６ＭｎＲ钢和ＷＣＦ６２ 钢的Ｊ积分阻力曲线及条件起裂值，与标准的多试样法相比，误差均在工程许可范围内．

Based on the method of three curves and the method of unloading compliance, a simple new method is proposed for measuring J resistence curves of metallic materials. The measurement of J resistence curves and their proof values at crack initiations were carried out using 1Cr1/2Mo,16MnR and WCF62 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.