摘要
对A131钢环焊接头的断裂韧性δC进行了试验测定,自行编制了确定接头断裂韧性δC概率统计分布的计算机程序。将试验数据输入计算程序,只需一次计算就可确定断裂韧性是否符合三种常用分布(正态分布、对数正态分布、威布尔分布)之一,该程序对快速、准确确定材料力学性能的概率统计分布以及对结构进行可靠性分析具有重要应用价值。统计检验结果表明,A131钢环焊接头的断裂韧性δC可以符合正态分布、对数正态分布或威布尔分布。威布尔分布是描述管道焊缝金属断裂韧度指标δC的最佳拟合分布函数。
The fracture toughness experiments of cercumferential welding joint was carried out in this paper for A131 steel. The fracture toughness experimental results were analyzed by using computer program which was developed by ourselves. The distribution of weld fracture toughness which may accord with normal distribution, lognormal distribution or weibull distribution can be determined by calculating the results only one time. The program, which plays an important role in structure reliability analysis, can be used to determine the probability statistic distribution of the mechanical properties. The statistical testing results indicated that the weld joint fracture toughness of the A131 steel can either accord with normal distribution, lognormal distribution or weibull distribution. But the optimum fitting distribution of the fracture toughness δ_C is weibull distribution.
出处
《理化检验（物理分册）》
CAS
2004年第1期16-18,共3页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
基金
国家自然科学基金资助项目(59675046)
