文献类型：期刊文献

英文题名：The applicability of notched plate tension specimen in determining the multiaxial stress rupture criterion of creeping materials

作者：Su, Jie[1];Zhang, Kun[1];Cheng, Hang[1];Tan, Jian-Ping[1,2,3];Zhang, Xuan[1];Song, Yuan-Xu[1];Song, Jia-Nan[4];Liu, Xuan[5];Bao, Shi-Yi[6,7];Liu, Chang-Jun[1];Tu, Shan-Tung[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Safety, Shanghai 200237, Peoples R China;[3]Shanghai Inst Aircraft Mech & Control, Shanghai 200237, Peoples R China;[4]Cent South Univ, Sch Mech & Elect Engn, Changsha 410083, Peoples R China;[5]Shenyang Res Inst Chem Ind, Chem Ind Safety Technol & Engn Ctr, Shenyang 110021, Peoples R China;[6]Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310023, Peoples R China;[7]Zhejiang Univ Technol, Engn Res Ctr Proc Equipment & Remfg, Minist Educ, Hangzhou 310023, Peoples R China

年份：2025

卷号：330

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20254619485419);WOS:【SCI-EXPANDED(收录号:WOS:001614955300001)】；

基金：This work is financially sponsored by Projects of the National Natural Science Foundation of China (52405153), Natural Science Foundation of Shanghai Municipality (24ZR1417100), Xin Liao Talent Program (XLYC2204030) and Shanghai Gaofeng Project for University Academic Program Development.

语种：英文

外文关键词：Multiaxial stress rupture criterion; Creep life prediction; Notched plate tension; Circumferentially notched tension; Skeletal point; Titanium alloy

摘要：In this study, the applicability of the notched plate tension (NPT) specimen for establishing the multiaxial stress rupture criterion (MSRC) of the titanium alloy Ti-6Al-2Cr-2Mo is systematically evaluated using direct, indirect, and empirical determination methods. The investigation considers four widely adopted MSRCs: the Sdobyrev-Hayhurst-Leckie (SHL), Cane, and Nix criteria-collectively referred to as Type-1 MSRC with an adjustable factor-and the Huddleston criterion, referred to as Type-2 MSRC without such a factor. Results demonstrate that the suitability of the NPT specimen depends on the specific MSRC considered, the stress-state factor, the notch acuity, and the location from which stresses are extracted. The three Type-1 MSRCs yield essentially equivalent predictions of multiaxial creep life; however, unlike circumferentially notched tension (CNT) specimens, NPT specimens are unsuitable for direct calibration of Type-1 MSRCs, as the determined adjustable factor exhibits high sensitivity to both stress-state factor and notch acuity, and often falls well below zero-outside its physically admissible range. For the Type-2 MSRC, close agreement between predicted and experimental creep lives is obtained only when stress components at the notch center center, rather than at the skeletal point, are used. The intrinsic equivalence of the three Type-1 MSRCs is also examined. To address the limitations of NPT specimens in Type-1 MSRC calibration, two NPT-based approaches are proposed and validated, enabling a more reliable determination of MSRC for creeping material.