| 2,441 | 23 | 208 |
| 下载次数 | 被引频次 | 阅读次数 |
利用INSTRON试验机对低应变率(0.0001～0.01 s-1)下的Q235钢(冷轧、热轧)的拉伸断裂行为进行了研究,并利用Abaqus有限元软件分别对冷轧Q235钢和热轧Q235钢的拉伸断裂过程进行了数值模拟。结果表明:在低应变率下,随着应变率的提高,钢材的屈服应力和峰值应力提高,但是屈服应力对应变率的变化更敏感。对于Q235钢来说,冷轧钢与热轧钢的拉伸力学性能存在一定区别。冷轧钢的强度比热轧钢的高,但韧塑性却要低于热轧钢,峰值应力和断面收缩率对应变率变化更加敏感。基于试验数据拟合获得了冷轧Q235钢和热轧Q235钢的Johnson-Cook本构模型参数,仿真验证了模型对钢材拉伸力学行为描述的合理性和可靠性。
Abstract：The tensile fracture behavior of Q235 steel(cold-rolled,hot-rolled) at low strain rates(0.0001-0.01 s-1) was investigated by using INSTRON tester.The tensile fracture process of cold-rolled Q235 steel and hot-rolled Q235 steel was numerically simulated by Abaqus.The results show that under low strain rates,with the strain rate increases,the yield stress and peak stress of the steel increase,but the yield stress is more sensitive to the change of strain rate.For Q235 steel,the tensile mechanical properties of cold-rolled steel and hot-rolled steel are different.The strength of cold-rolled steel is higher than that of hot-rolled steel,but its ductility is lower than that of hot-rolled steel,and the peak stress and reduction of area are more sensitive to the change of strain rate.The Johnson-Cook constitutive model parameters of cold-rolled Q235 steel and hot-rolled Q235 steel were obtained based on test data.The rationality and reliability of the description of the model on tensile mechanical behavior of steel were verified.
[1]傅作宝.冷轧薄钢板生产[M].2版.北京:冶金工业出版社,2005.FU Zuobao.Cold rolled steel sheet production[M].The Second Edition.Beijing:Metallurgical Industry Press,2005.
[2]张元豪,陈长海,朱锡.Q235钢板对高速弹的抗侵彻特性研究[J].舰船科学技术,2017,39(2):38-54.ZHANG Yuanhao,CHEN Changhai,ZHU Xi.Ballistic performance of Q235 steel plate subjected to impact by middle and high velocity projectiles[J].Ship Science and Technology,2017,39(2):38-54.
[3]张航.Q235钢在两相区的热轧模拟研究[D].重庆:重庆大学,2014.ZHANG Hang.Study on Q235 steel hot rolling simulation in twophase zone[D].Chongqing:Chongqing University,2014.
[4]陈俊岭,舒文雅,李金成.Q235钢材在不同应变率下力学性能的试验研究[J].同济大学学报(自然科学版),2016,44(7):1071-1075.CHEN Junling,SHU Wenya,LI Jincheng.Experimental study on dynamic mechanical property of Q235 steel at different strain rates[J].Journal of Tongji University(Natural Science),2016,44(7):1071-1075.
[5]刘君,杨合,孙志超,等.K403镍基高温合金的高温拉伸断裂行为[J].兵器材料科学与工程,2014,37(6):25-28.LIU Jun,YANG He,SUN Zhichao,et al.High temperature tensile fracture behavior of K403 Ni-based superalloy[J].Ordnance Material Science and Engineering,2014,37(6):25-28.
[6]王永刚,贺红亮.20#钢动态拉伸断裂行为及其临界损伤度研究[J].固体力学学报,2008,39(4):354-360.WANG Yonggang,HE Hongliang.Study on the dynamic tensile fracture and critical damage of 20#steel[J].Chineae Journal of Solid Mechanics,2008,39(4):354-360.
[7]张洪生.Q235钢棘轮效应本构模型的研究[D].秦皇岛:燕山大学,2016.ZHANG Hongsheng.Study on the constitutive model of the ratchet effect of Q235 steel[D].Qinhuangdao:Yanshan University,2016.
[8]陈大年,吴善幸,王焕然,等.高压/高应变率荷载下金属的本构关系与拉伸断裂[C]//第七届全国工程结构安全防护学术会议论文集.宁波,2009:1-11.CHEN Danian,WU Shanxing,WANG Huanran,et al Metal constitutive relation and tensile fracture under high pressure/high strain rate loads[C]//The Seventh National Conference on Safety Protection of Engineering Structures.Ningbo,2009:1-11.
[9]GB/T 228.1-2010,金属材料拉伸试验第1部分:室温试验方法[S].GB/T 228.1-2010,Metallic materials-Tensile testing-Part 1:Method of test at room temperature[S].
[10]张磊.Q235钢拉伸性能的有限元仿真与试验[D].长春:吉林大学,2016.ZHANG Lei.Finite element simulation and experiment of tensile properties of Q235[D].Changchun:Jilin University,2016.
[11]GB/T 22315-2008,金属材料弹性模量和泊松比试验方法[S].GB/T 22315-2008,Metallic materials-Determination of modulus of elasticity and Poisson's ratio[S].
[12]郭子涛.弹体入水特性及不同介质条件金属靶的抗侵彻性能研究[D].哈尔滨:哈尔滨工业大学,2012.GUO Zitao.Research on characteristics of projectile water entry and ballistic resistance of targets under different mediums[D].Harbin:Harbin Institute of Technology,2012.
[13]GAMBLE E A,COMPTON B G,ZOK F W.Impact response of layered steel-alumina targets[J].Mechanics of Materials,2013,(60):80-92.
[14]李磊,张先锋,吴雪,等.不同硬度30CrMnSiNi2A钢的动态本构与损伤参数研究[J].高压物理学报,2017,31(3):239-248.LI Lei,ZHANG Xianfeng,WU Xue,et al.Investigation on dynamic constitution and damage parameters of 30CrMnSiNi2A steel at different hardness[J].Chinese Journal of High Pressure Physics,2017,31(3):239-248.
基本信息:
中图分类号:TG142.15
引用信息:
[1]王玉凯,赵建新.Q235钢拉伸断裂试验与数值仿真[J].塑性工程学报,2019,26(01):168-173.
2019-02-28
2019-02-28