Study on critical load for assessing plane strain fracture toughness
Author(s): DAN Chen, CAI Lixun, BAO Chen, YAO Yao
Pages: 21-24
Year: 2014 Issue: 1
Journal: CHINA MEASUREMENT & TESTING TECHNOLOGY
Keyword: fracture toughness; critical load; secant method; calibration factor; relative secant slope; finite element analysis;
Abstract: 针对新版断裂韧性测试规范扩大的裂纹长度适用范围,利用有限元精细分析用于平面应变断裂韧度KIC评定中割线法确定临界载荷PQ的相对割线斜率△S的合理性,提出0.45≤a/W≤0.7范围内的相对割线斜率△S的表达式.结果表明:现行规范推荐的相对割线斜率△S不再适合于确定0.55＜a/W≤0.7范围内的临界载荷PQ,其最大相对误差已近8％.
Pages: 21-24
Year: 2014 Issue: 1
Journal: CHINA MEASUREMENT & TESTING TECHNOLOGY
Keyword: fracture toughness; critical load; secant method; calibration factor; relative secant slope; finite element analysis;
Abstract: 针对新版断裂韧性测试规范扩大的裂纹长度适用范围,利用有限元精细分析用于平面应变断裂韧度KIC评定中割线法确定临界载荷PQ的相对割线斜率△S的合理性,提出0.45≤a/W≤0.7范围内的相对割线斜率△S的表达式.结果表明:现行规范推荐的相对割线斜率△S不再适合于确定0.55＜a/W≤0.7范围内的临界载荷PQ,其最大相对误差已近8％.
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