文献类型：期刊文献

英文题名：Interpretation of non-conventional miniaturized creep test: derivation of equivalent gauge length

作者：Sun, Wei[1];Li, Suo[2];Zhou, Guo-Yan[3];Li, Ming[1,4];Wen, Zhi-Xun[4];Yue, Zhu-Feng[4];Tu, Shan-Tung[3]

机构：[1]Univ Nottingham, Fac Engn, Nottingham NG7, England;[2]Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[4]Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China

年份：2023

卷号：24

起止页码：4390

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20230101884);WOS:【SCI-EXPANDED(收录号:WOS:001042713700001)】；

基金：& nbsp;This work was supported by the Engineering and Physical Sciences Research Council (EPSRC) UK [Grant Numbers: EP/N509991/1, EP/K021095/1 and EP/N509942/1] . Wei Sun would like to acknowledge EPSRC and Brian Webster and Shane Maskill for their long-term support of experimental work. Shan-Tung Tu and Guo-Yan Zhou would like to acknowledge the National Natural Science Foundation of China (No. 52130511) and the Higher Education Discipline Innovation Project (111 Project) (No. B13020) . Zhufeng Yue and Zhixun Wen would like to acknowledge the National Natural Science Foundation of China (Nos. 51875461, 51875462) .

语种：英文

外文关键词：Steady-state creep; Data interpretation; Conversion parameters; Effect of geometry change; Effective volume

摘要：The objective of this paper is to clarify the nature of the equivalent gauge length of miniaturized creep test methods. A mechanics-based approach was employed to allow conventional uniaxial creep data to be obtained from non-conventional miniaturized creep tests, under steady-state creep. The data interpretation is based on the reference stress method. On this basis, the theoretical derivation of the equivalent gauge lengths for a range of miniature specimen types is presented, including sub-size uniaxial, small punch, impression, small rings, miniature 2 bars, and miniature bending beams and plate. Then the effect of geometry change due to the creep test on the conversion parameters is evaluated. Finally, several theoretical and practical aspects, related to specimen defor-mation modes, the basis of the correlation methods, the sensitivity of "strain measure-ments", the effective volumes, the choice of test methods, etc, are addressed.& COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).