0Cr18Ni10Ti管道钢的随机循环本构模型  

Random Cyclic Constitutive Models 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1期45-49,63,共6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(200234) ;教育部优秀青年教师资助计划项目(2101)资助

摘　　要：通过完成增量步应变控制疲劳试验,研究了新管道钢0Cr18Ni10Ti的随机循环本构关系。试验验证了以前在焊缝金属试验中的发现与推断,即工程材料的循环本构存在随机性,与循环应变-寿命关系的随机性一样,是固有的疲劳现象。拓展以前赵等人的工作(Nucl. Eng. Des., 2000, 199(3): 315-326),基于Ramberg-Osgood方程及其修正形式,提出了任意存活概率和置信度的随机循环本构模型及参数的求解方法。模型包括存活概率-应变-寿命曲线、置信度-应变-寿命曲线和存活概率-置信度-应变-寿命曲线。试验数据分析验证了模型的有效性和实用性。Experimental study is performed on the random cyclic constitutive relations of a new pipe stainless steel, 0Cr18Ni10Ti, by an incremental strain-controlled fatigue test. In the test, it is verified that the random cyclic constitutive relations, like the wide recognized random cyclic strain-life relations, is an intrinsic fatigue phenomenon of engineering materials. Extrapolating the previous work by Zhao et al (Nucl. Eng. Des. 2000, 199(3): 315-326), probability-based constitutive models are constructed, respectively, on the bases of Ramberg-Osgood equation and its modified form. Scattering regularity and amount of the test data are taken into account. The models consist of the survival probability-strain-life curves, the confidence- strain-life curves, and the survival probability-confidence-strain-life curves. Availability and feasibility of the models have been indicated by analysis of the present test data.

关 键 词：管道 0Cr18Ni10Ti钢 随机循环本构模型 Ramberg-Osgood方程 疲劳试验 反应堆 

分 类 号：TL341[核科学技术—核技术及应用] TG142.15[一般工业技术—材料科学与工程]