摘要
以裂纹张开位移为断裂参数 ,研究了 16MnR压力容器用钢断裂韧性的统计分布特性 .将焊接接头部位划分为母材、焊缝和热影响区 3个独立区域 ,分别测量 3个区的裂纹张开位移 ,得到正态分布、对数正态分布及两参数威布尔分布的 3种概率密度函数 ,并用柯尔莫哥洛夫 斯米尔诺夫方法 (K S方法 )检验了参数的适用性 .研究结果表明 ,这 3种分布对裂纹张开位移分布规律的描述是接近的 ,所以根据曲线的趋势以及分布函数的普遍性 ,推荐使用两参数威布尔分布 .
Probabilistic characteristics of fracture toughness are studied for welded joint of 16MnR pressure vessel steel. The joint was divided into three independent zones, i.e. base material, weld metal and heat affect zone. The crack opening displacement δ c of each zone were measured and the probability density functions were obtained. Gaussian distribution, log normal distribution and Weibull distribution were taken into account. Using the K?S examination method, these three distributions were used to describe the scatter of δ c. The Weibull distribution appears to be the best one.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2000年第4期71-74,93,共5页
Journal of Xi'an Jiaotong University
基金
西安交通大学跨世纪人才基金资助项目
国家教育部留学归国人员基金
关键词
断裂韧性
概率密度函数
压力容器
钢
韦伯分布
fracture toughness
probability density function
Weibull distribution
