0Cr18Ni10Ti管道钢的随机循环应变-寿命关系  

Random Cyclic Strain-Life Relations of 0Cr18Ni10Ti Pipe Steel

作　　者：赵永翔[1] 杨冰[1] 李朋州[2] 

机构地区：[1]西南交通大学机械工程研究所,成都610031 [2]中国核动力研究设计院,成都610041

出　　处：《核动力工程》2004年第2期142-146,共5页Nuclear Power Engineering

基　　金：国家自然科学基金(50075073);全国优秀博士学位论文作者专项资金(2002067);教育部优秀青年教师资助计划项目(2101)资助

摘　　要：试验研究了管道钢0Cr18Ni10Ti的随机循环应变-寿命关系。基于Coffin-Manson方程,提出了考虑了任意存活概率和置信度的随机CSL关系的模型及参数的求解方法。模型由概率-应变-寿命曲线、置信度-应变-寿命曲线和概率-置信度-应变-寿命曲线组成,分别用于表征试验数据分散性规律、数据量以及两者同时对概率评价的影响。试验数据的分析结果验证了模型的有效性和实用性。Experimental study is performed on the random cyclic strain-life relations of the new pipe steel, 0Cr18Ni10Ti, by strain-controlled fatigue tests. Probabilistic models for characterizing the relations are presented on a basis of the Coffin-Manson strain-life equation. Three kinds of effects on probabilistic assessments are taken into account, which are the scattering regularity, the amount, and the combined effect of scattering regularity and the amount of the test data. With respect to these effects, the models are consisted of three kinds of probabilistic curves, i.e. the survival probability-strain-life curves, the confidence-based strain-life curves, and the probability and confidence-based strain-life curves. Availability and feasibility of the models are indicated by an analysis to the test results.

关 键 词：管道 OCr18Ni1OTi钢 随机循环应变-寿命关系 COffin-Mason方程 

分 类 号：TL341[核科学技术—核技术及应用] O346.2[理学—固体力学]