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Biaxial tensile behavior and yield loci of dual-phase steel sheets

Journal of Iron and Steel Research International 2018年第5期25卷 589-597页

作者： Zhao-xuan Hou Min Wan Xiang-dong Wu Zheng-yang Cai Xue-li Gong Hao Wang School of Mechanical Engineering and Automation Beihang University Beijing 100191 China

The biaxial tensile tests were carried out to investigate the deformation behavior and yield loci of dual-phase （DP） steel sheets under biaxial tensile conditions. The true stress-true strain curves of DP steel sheets for different loading ratios were obtained, and the experimental yield loci were determined based on the equivalent plastic work principle. The experimental yield loci were compared to the theoretical yield loci based on Hi1148, Hi1190, Hi1193, Hosford, Barlat89, Yld2000-2d and Gotoh yield criteria. It is found that Yld2000-2d yield criterion can describe the general trends of experimental yield loci of DP steel sheets with comparably higher accuracy. Hosford criterion has the maximum error for DP590, whereas Hi1148 and Barlat89 have the maximum errors for DP780 and DP980.

关键词： Dual-phase steel sheet ·Biaxial tensile test Loading ratio yield locus Yld2000-2d yield criterion

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

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Chinese Journal of Aeronautics 2023年第5期36卷 344-362页

作者： Lin QI Yazhou GUO Kanghua JIN Huaipu KANG Yulong LI School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of Impact Dynamics and Engineering Applications Northwestern Polytechnical UniversityXi’an 710072China School of Civil Aviation Northwestern Polytechnical UniversitySuzhou 215699China NPU Yangzi River Delta Research Institute Suzhou 215400China

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.

关键词： Biaxial tensile testing Inverse analysis Strengthening behavior Ti-6Al-4V yield locus

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yield Loci of TRIP590 Advanced High Strength Steel Based on Biaxial Loading Test

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Transactions of Nanjing University of Aeronautics and Astronautics 2019年第4期36卷 686-692页

作者： GUAN Yanzhi LI Jiaxin WANG Haibo YAN Yu College of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144P.R.China Engineering Research Center of Variable Cross-Section Roll Forming Beijing 100144P.R.China

The main purpose of the paper is to obtain the experimental yield loci of TRIP590 advanced high strength steel,and to compare it with the theoretical loci in order to obtain the best yield criterion for this ***,the biaxial loading tests under different loading paths in the method of load control are carried ***,the experimental yield loci of different deformation stages are ***,the experimental yield loci are compared with the theoretical loci of Mises criterion and Hill48 criterion,the parameters of which are calculated based on the r?value and the yield stress method,*** results show that the accuracy of the theoretical yield loci of Hill48 based on the yield stress is higher than that of Mises criterion and Hill 48 criterion based on r?value method.

关键词： TRIP590 advanced high strength steel yield locus yield criterion

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