第48卷第3期Vol.48No.3FORGING&STAMPINGTECHNOLOGY2023年3月Mar.2023高应变速率下TA1纯钛薄板的J-C本构及失效模型研究黄艺帆1,2,董芃欣1,2,吴泽霖1,2,曹全梁1,2,谌祺1,2,韩小涛1,2(1.华中科技大学国家脉冲强磁场科学中心,湖北武汉430074;2.华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074)摘要:为探究TA1纯钛的动态力学性能,对0.5mm厚度的TA1纯钛薄板试样进行了准静态以及不同应变速率下的动态拉伸实验,建立了能够真实反映TA1纯钛在高应变速率和较大应变范围内的塑性变形特征的Johnson-Cook(J-C)本构模型,并对原始模型进行了修正;同时,对不同缺口半径的TA1纯钛拉伸试样进行了准静态拉伸实验,建立了基于应力三轴度的失效模型。将建立的J-C本构与失效模型应用于LS-Dyna中进行仿真模拟,并与实验数据对比,验证了模型的有效性与实用性。关键词:TA1纯钛;动态力学性能;本构模型;失效模型;应力三轴度DOI:10.13330/j.issn.1000-3940.2023.03.033中图分类号:TG146文献标志码:A文章编号:1000-3940(2023)03-0236-08ResearchonJ-CconstitutiveandfailuremodelsforTA1puretitaniumsheetunderhighstrainrateHuangYifan1,2,DongPengxin1,2,WuZelin1,2,CaoQuanliang1,2,ChenQi1,2,HanXiaotao1,2(1.NationalPulsedHighMagneticFieldScienceCenter,HuazhongUniversityofScienceandTechnology,Wuhan430074,China;2.StateKeyLaboratoryofHighPowerElectromagneticEngineeringandNewTechnology,HuazhongUniversityofScienceandTechnology,Wuhan430074,China)Abstract:InordertoexplorethedynamicmechanicalpropertiesofTA1puretitanium,thequasi-staticanddynamictensileexperimentsofTA1puretitaniumsheetsampleswiththethicknessof0.5mmunderdifferentstrainrateswerecarriedout,theJohnson-Cook(J-C)con-stitutivemodeltrulyreflectingtheplasticdeformationcharacteristicsofTA1puretitaniuminhighstrainrateandlargestrainrangewases-tablished,andtheoriginalmodelwasmodified.Meanwhile,thequasi-statictensileexperimentswerecarriedoutonTA1puretitaniumtensilesampleswithdifferentnotchradii,andthefailuremodelbasedonstresstriaxialitywasestablished.TheestablishedJ-CconstitutiveandfailuremodelswereappliedtoLS-Dynaforsimulation,andthevalidityandpracticabilityofthemodelwereverifiedbycomparingwiththeexperimentaldata.Keywords:TA...
