文献类型：期刊文献

英文题名：Relationship between strain and central deflection in small punch creep specimens

作者：Yang, Zhen[1]; Wang, Zhi-wen[1]

机构：[1]E China Univ Sci & Technol, Res Inst Proc Equipment & Pressure Vessel, Shanghai 200237, Peoples R China

年份：2003

卷号：80

期号：6

起止页码：397

外文期刊名：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

收录：;EI(收录号：2003387635056);WOS:【SCI-EXPANDED(收录号:WOS:000184677000007)】；

语种：英文

外文关键词：small punch test; creep; strain analysis

摘要：Acquiring information about creep strain directly from small punch creep tests is difficult because the deformation behaviour of the small punch specimen is complicated. A routine is suggested in the present paper to treat this problem indirectly. Based on a finite element analysis, it is proposed that the relationship of central deflection delta to central creep strain epsilon(c) of a specimen subjected to creep can be represented approximately by the relationship of central deflection delta to central (elastic-plastic) strain epsilon of a specimen not subjected to creep. With this hypothesis, the delta - epsilon(c) relation of the small punch creep specimen is obtained by resorting to a rigid-plastic membrane stretch forming model. Finally, small punch creep test results are used to evaluate creep strain and creep strain rate by taking advantage of this delta similar to epsilon(c) relation. (C) 2003 Elsevier Ltd. All rights reserved.