基于柔度法的断裂韧性误差测量分析  

Measurement error analysis of dynamic fracture toughness by COD techniques

作　　者：胡家杰[1,2] 钟雯 张庆功[3] Hu Jiajie;Zhong Wen;Zhang Qinggong(Tribology Research Institute,Southwest Jiaotong University,Chengdu 610031,China;Chengdu Aircraft Industrial（Group）Co.Ltd.,Chengdu 610091,China;Sehool of Mechanical Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]西南交通大学摩擦学研究所,成都610031 [2]成都飞机工业集团有限责任公司,成都610091 [3]西华大学机械工程学院,成都610039

出　　处：《现代制造工程》2018年第10期119-122,共4页Modern Manufacturing Engineering

基　　金：国家自然科学基金项目(51405395)

摘　　要：在柔度法测量金属材料裂纹长度的基本力学原理基础上,介绍并讨论在裂纹预制过程中影响测量三点弯曲(SEB)试样裂纹长度准确性的因素。通过试验研究发现:弹性模量对于裂纹初始长度计算非常重要,F-s关系的线性决定了试验过程中裂纹长度的估算准确性,柔度法的测量结果与裂纹实际长度存在一定误差。Based on compliance method of the fracture mechanics, the reason of error in the Single Edged Bending （SEB） specimen fracture toughness testing had been researched. The results indicate that the modulus of elasticity is a important parameter to calculate the initialization crack length. The linearity of F-V decision the calculate precision in the test. There have a different between the compliance method and direct reading method.

关 键 词：断裂韧性 三点弯曲试样 柔度 线性 

分 类 号：O346.1[理学—固体力学]