Biaxial tensile behavior of Ti-6Al-4V under proportional loading

作     者：Lin QI Yazhou GUO Kanghua JIN Huaipu KANG Yulong LI Lin QI;Yazhou GUO;Kanghua JIN;Huaipu KANG;Yulong LI

作者机构：School of AeronauticsNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of Impact Dynamics and Engineering ApplicationsNorthwestern Polytechnical UniversityXi’an 710072China School of Civil AviationNorthwestern Polytechnical UniversitySuzhou 215699China NPU Yangzi River Delta Research InstituteSuzhou 215400China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2023年第36卷第5期

页      面：344-362页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the financial support from National Natural Science Foundation of China(Nos.11922211,11832015,11527803) the 111 Project,China(No.BP0719007) Science Challenge Project,China(No.TZ2018001) 

主　　题：Biaxial tensile testing Inverse analysis Strengthening behavior Ti-6Al-4V Yield locus 

摘      要：The biaxial tensile behavior of isotropic Ti-6Al-4 V is characterized in this paper.A novel cruciform specimen was designed and optimized to achieve uniform stress and strain distribution within the gauge *** tensile tests were conducted at three different loading ratios by the biaxial testing *** Digital Image Correlation(DIC)technique was applied to determine strain distribution,and a high-speed camera was employed to record the fracture *** Inverse Analysis(IA)approach with a combined experimental and numerical method was proposed to determine the true stresses at the gauge section of the specimen during biaxial tensile *** results indicate that the initial yield locus can be described by the Cazacu criterion accurately,whereas the Mises criterion can predict better the strengthening behavior of Ti-6Al-4 V in the first quadrant in the principal stress space.