Strain Hardening Effect of QSTE700 Cold-Formed High Strength Steel Square Tube

Abstract

Abstract:

Serial tensile tests were conducted to investigate the mechanical properties of different parts for QSTE700 square 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.

Key words: high strength steel, square tube, roll forming, tensile test, strain hardening

CLC Number:

TG 113.25

CHAO Can1,ZHAO Yixi1,KANG Wen1,YAN Peijie2,MA Yuefeng2. Strain Hardening Effect of QSTE700 Cold-Formed High Strength Steel Square Tube[J]. Journal of Shanghai Jiaotong University, 2014, 48(05): 605-609.

References

［1］GB50018—2002, 冷弯薄壁型钢结构技术规范［S］.

［2］Hu S D, Ye B, Li L X. Materials properties of thick

wall coldrolled welded tube with a rectangular or square hollow section ［J］. Construction and Building Materials, 2011, 25(5): 26832689.

［3］李黎明, 姜忻良, 陈志华, 等. 冷弯厚壁型钢钢管冷作硬化效应［J］. 天津大学学报, 2008, 41(1): 8591.

LI Liming, JIANG Xinliang, CHEN Zhihua, et al. Strain hardening of thickwalled cold formed steel tube［J］. Journal Tianjin University, 2008, 41(1): 8591.

［4］Afshan S, Rossi B, Gardner L. Strength enhancements in coldformed structural sections——Part I: Material testing ［J］. Journal of Constructional Steel Research, 2013, 83: 177188.

［5］Rossi B, Afshan S, Gardner L. Strength enhancements in coldformed structural sections——Part II: Predictive models ［J］. Journal of Constructional Steel Research, 2013, 83: 189196.

［6］Ashraf M, Gardner L, Nethercot D A. Strength enhancement of the corner regions of stainless steel crosssections ［J］. Journal of Constructional Steel Research, 2005, 61(1):3752.

［7］Gardner L, Nethercot D A. Experiments on stainless steel hollow sections——Part 1: Material and crosssectionalbehavior ［J］. Journal of Constructional Steel Research, 2004, 60(9):12911318.

［8］GB/T 228.1—2010, 金属材料拉伸试验第1部分: 室温试验方法［S］.

［9］Van der Merwe P, Van den Berg G J. Prediction of corner mechanical properties for stainless steels due to cold forming［EB/OL］.［20130910］. https://mospace.umsystem.edu/xmlui/bitstream/handle/10355/27982/Prediction_of_Corner_Mechanical_Properties_for_Stainless_Steels_Due_to_Cold_Forming.pdf?sequence=1.

[1]	WANGJuan, YANG Mingwang, ZHENG Maoyao, LIULingyun, ZHAOLijun. Application of High Strength Steelin Construction of Large Semi-Submersible Platforms [J]. Ocean Engineering Equipment and Technology, 2022, 9(1): 27-31.
[2]	LIU Changjiang, ZHAO Bing, CHEN Wujun. Test of Uniaxial Tensile Mechanical Properties of ECTFE Foils at Various Temperatures [J]. Journal of Shanghai Jiao Tong University, 2021, 55(4): 387-393.
[3]	XIAO Fenglin,ZHANG Yansong. Simulation Analysis on Fracture Modes of Ultra-High Strength Steel Spot-Welded Lap-Shear Joints [J]. Journal of Shanghai Jiaotong University, 2018, 52(3): 312-317.
[4]	WU Nianduo，QIANG Xuhong，LIU Xiao，LUO Yongfeng. Calculation of Initial Stiffness of T-Stubs Under Consideration of Bending Stiffness of Bolts [J]. Journal of Shanghai Jiaotong University, 2018, 52(12): 1571-1579.
[5]	TIAN Hongliang (田红亮), CHEN Baojia* (陈保家), HE Kongde (何孔德), DONG Yuanfa (董元发),. A New Fractal Model of Elastic, Elastoplastic and Plastic Normal Contact Stiffness for Slow Sliding Interface Considering Dynamic Friction and Strain Hardening [J]. Journal of shanghai Jiaotong University (Science), 2017, 22(5): 589-601.
[6]	GU Xinjian，YU Zhongqi，SONG Yang. Numerical Analysis of the Effect of Processing Parameters on#br# Temperature on the Contact Interface During#br# High Strength Steel Cold Stamping [J]. Journal of Shanghai Jiaotong University, 2017, 51(4): 426-.
[7]	ZHENG Xiankun,WANG Wurong,WEI Xicheng. Plastic Deformation Behavior of HotDipped Advanced Galvanized Steel#br# Under the Condition of Friction Coupling [J]. Journal of Shanghai Jiaotong University, 2017, 51(4): 432-.
[8]	PENG Xuefeng1，HAN Jingtao1，LIU Jing1，YAN Peijie2. Effect of Induction Tempering on Mechanical Properties of#br# ColdFormed High Strength Steel Square Tube [J]. Journal of Shanghai Jiaotong University, 2017, 51(4): 438-.
[9]	DING Yanan，TAN Shulin，HAN Xianhong，CUI Zhenshan. Model of Properties Prediction for Boron Steel Hot Stamping Products and Its Validation in a U-Cap Part [J]. Journal of Shanghai Jiaotong University, 2017, 51(11): 1320-1327.
[10]	YAN Jiawei，HU Qi，WANG Zhenzhen，CHEN Jun. A Comparison Study of Different Hardening Models in Springback Prediction for Stamping of the Third Generation Ultra High Strength Steel [J]. Journal of Shanghai Jiaotong University, 2017, 51(11): 1334-1339.
[11]	LI Chun,CHEN Wujun,HE Shizan. Experimental Study of Uniaxial Tensile Mechanical Properties of Fluorinated Ethylene Propylene Foils [J]. Journal of Shanghai Jiaotong University, 2016, 50(01): 72-77.
[12]	YAN Yu,WANG Haibo,ZHAO Wei. Establishment of Strain Rate Dependent Constitutive Model for Roll Forming Process [J]. Journal of Shanghai Jiaotong University, 2015, 49(01): 7-11.
[13]	WANG Zhenxiao,ZHAO Yixi,KONG Qingshuai,YU Zhongqi. Controlling Method for Edge Wave in Flexible Roll Forming [J]. Journal of Shanghai Jiaotong University, 2014, 48(05): 624-628.
[14]	ZHENG Huan1,WU Yanjun2, 3,DIAO Keshan2, 3,ZHUANG Xincun1CHEN Jieshi1, ZHAO Zhen1. Experimental Investigation of the Influence of Sheared Edge on Tensile Properties of Dual Phase Steel [J]. Journal of Shanghai Jiaotong University, 2014, 48(03): 405-411.
[15]	HU Xiang-dong1,2* (胡向东), WANG Jin-tai1,2 (王金泰), YU Rui-zhi3 (余睿智). Uniaxial Compressive and Splitting Tensile Tests of Artificially Frozen Soils in Tunnel Construction of Hong Kong [J]. Journal of shanghai Jiaotong University (Science), 2013, 18(6): 688-692.