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

被引：0
作者：
Lin QI [1 ,2 ]
Yazhou GUO [1 ,2 ]
Kanghua JIN [1 ,2 ]
Huaipu KANG [1 ,2 ]
Yulong LI [1 ,2 ,3 ,4 ]
机构：
[1] School of Aeronautics, Northwestern Polytechnical University
[2] Shaanxi Key Laboratory of Impact Dynamics and Engineering Applications, Northwestern Polytechnical University
[3] School of Civil Aviation, Northwestern Polytechnical University
[4] NPU Yangzi River Delta Research Institute
来源：
Chinese Journal of Aeronautics | 2023年 / 05期
基金：
中国国家自然科学基金;
关键词：
D O I：
暂无
中图分类号：
V252.2 [有色金属（总论）];
学科分类号：
0805 ; 080502 ;
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 area. Biaxial tensile tests were conducted at three different loading ratios by the biaxial testing machine. The Digital Image Correlation(DIC) technique was applied to determine strain distribution, and a high-speed camera was employed to record the fracture process. An 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 tests. The 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.
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页码：344 / 362
页数：19
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