文献类型：期刊文献

中文题名：高温金属结构缺陷免予蠕变失效评定的条件

英文题名：Creep Exemption Criteria for Defective Structures at High Temperature

作者：轩福贞[1];涂善东[1];王正东[1];李培宁[1]

机构：[1]华东理工大学机械工程学院

年份：2004

卷号：15

期号：10

起止页码：928

中文期刊名：中国机械工程

外文期刊名：China Mechanical Engineering

收录：CSTPCD;;EI(收录号：2004328306816);Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金："十五"国家科技攻关项目 ( 2 0 0 1BA80 3B0 3 ) ;国家杰出青年基金资助项目 ( 5 0 2 2 5 5 17) ;上海市自然科学基金资助项目( 0 3ZR14 0 2 2 )

语种：中文

中文关键词：高温;含缺陷结构;蠕变;免予评定条件

外文关键词：high temperature; defective structure; creep; exemption criteria

摘要：在有限蠕变变形前提下 ,定义了两个基于结构参考应力的状态参量 :特征温度和特征服役寿命 ;从服役设备合乎使用的角度出发 ,在上述两个参量的基础上建立了高温缺陷免予蠕变失效评定的准则 ,即当工作温度或服役时间小于相应的特征温度和特征服役寿命时不需要进行蠕变分析 ,可以按照常温缺陷评定方法进行评定 ;
Under the conditions of defective structures with limited creep strain, two parameters, that is, characteristic temperature and characteristic service-life, were introduced in terms of the reference stress of structures. From the principle of the fitness for service, a creep exemption criterion for defective structures at high temperature was set up on the basis of the proposed parameters. According to the proposed criterion, the creep failure assessment is then obviated provided that the operation temperature or service time is less than the defined characteristic temperature or characteristic service life, and the assessment techniques of defective structure at ambient temperature such as R6 procedure is suitable in this instance. The safety assessment of a cracked hydrogenation reactor was performed to illustrate the applicability of proposed creep exemption criteria.