文献类型：期刊文献

英文题名：Application of a database in the evaluation of strengths of Cr-Mo steels by means of small punch test

作者：Zhong, Jiru[1];Song, Ming[2];Guan, Kaishu[1];Dymacek, Petr[3]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]China Univ Petr East China, Sch Pipeline & Civil Engn, Qingdao 266580, Peoples R China;[3]Acad Sci Czech Republ, Inst Phys Mat, Brno 61662, Czech Republic

年份：2020

卷号：166

外文期刊名：INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES

收录：;EI(收录号：20194307565388);WOS:【SCI-EXPANDED(收录号:WOS:000514758000002)】；

基金：The authors are grateful to the National Key R&D Program of China (2018YFC0808800) for providing financial support.

语种：英文

外文关键词：Small punch test; Strength of materials; Database method; Finite element simulations

摘要：Extracting accurate strength properties from small punch test (SPT) results is still a challenge. Previous studies on determining the strength of materials via SPT employed empirical correlations, but these correlations are not generally accurate enough. Here we developed a database method to efficiently evaluate the yield strength and ultimate tensile strength. First, a database containing force-deflection curves of SPT and corresponding strengths of materials is created using finite element simulations coupled with a large amount of hypothetical materials. The database is then used to process the force-deflection curve of an investigated material for estimating strength values. A series of hypothetical materials that are not in the database were adopted to explore the accuracy in determining strengths by this method. The results show the theoretical accuracy values of the yield strength and ultimate tensile strength achieve 92.0% and 99.0%, respectively. The proposed method was also applied to estimate the strengths of Cr-Mo steels. It is found that the obtained strengths agree well with those acquired by uniaxial tensile testing. Using a database to evaluate strength properties is a novel and simple approach that could be widely spread in the study of SPT.