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《Journal of Shanghai Jiaotong University》 2014-05
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Strain Hardening Effect of QSTE700 Cold-Formed High Strength Steel Square Tube

CHAO Can;ZHAO Yi-xi;KANG Wen;YAN Pei-jie;MA Yue-feng;Shanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures,Shanghai Jiaotong University;Shanghai Baosteel Section Steel Co.Ltd.;  
Serial tensile tests were conducted to investigate the mechanical properties of different parts for QSTE700square tube.It shows that the strength is improved by 10%at welded portion while the strength of flat portion remained unchanged.The strength of corner portion is 17.78%higher than that of the original steel but still lower than that of the traditional carbon steel square tube.The real fillet plays an important role in yield strength improvement.The square tube in the FE model was divided into two parts with different material properties based the test data.The simulation result indicates that the model with different material properties is much closer to the real situation.
【Fund】: 国家自然科学基金(51075267 51375308)资助项目
【CateGory Index】: TG113.25
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