基于J-C模型的95W钨合金动态压缩本构关系  

Dynamic Compression Constitutive Relation of 95W Tungsten Alloy Based on J-C Model

作　　者：曲禹同 丁羽波 QU Yutong;DING Yubo

机构地区：[1]沈阳理工大学装备工程学院,沈阳110159

出　　处：《科技创新与应用》2022年第33期52-55,共4页Technology Innovation and Application

摘　　要：针对钨合金穿甲弹芯材料在侵彻过程中的动力学行为,使用直径为14.5 mm口径的分离式霍普金森压杆(SHPB)对细晶钨合金与普通钨合金进行动态压缩实验。得到动态压缩性条件下,并基于J-C本构模型对2种钨合金真应力-应变曲线进行拟合,得到细晶钨合金及传统钨合金动态压缩条件下的本构关系。使用LS-DYNA动力学软件建立实验布置相同的、原型尺寸的动态冲击压缩仿真模型。将得到2种钨合金压缩条件下材料本构方程带入仿真模型中,进行2种钨合金试样动态压缩的数值模拟,得到2种钨合金在各个应变率下数值模拟的动态压缩应力-应变曲线与试验得到的真应力-应变曲线吻合较好。表明拟合得到的2种钨合金J-C动态压缩本构关系可靠性较好,可用于冲击载荷下的仿真计算。According to the dynamic behavior of tungsten alloy armor-piercing core material during penetration,a split Hopkinson pressure bar(SHPB)with a diameter of 14.5mm was used to carry out dynamic compression experiments on fine-grained tungsten alloy and common tungsten alloy.Under the condition of dynamic compressibility,the true stress-strain curves of two kinds of tungsten alloys are fitted based on J-C constitutive model,and the constitutive relations of fine-grained tungsten alloys and traditional tungsten alloys under dynamic compression are obtained.The dynamic impact compression simulation model with the same experimental layout and prototype size is established by using LS-DYNA dynamics software.The constitutive equations of two kinds of tungsten alloys under compression conditions are brought into the simulation model,and the dynamic compression stress-strain curves of two kinds of tungsten alloys are numerically simulated.The dynamic compression stress-strain curves of two kinds of tungsten alloys are in good agreement with the true stress-strain curves obtained by experiments.The results show that the dynamic compression constitutive relations of two kinds of tungsten alloys J-C are reliable and can be used for simulation calculation under impact load.

关 键 词：细晶钨合金 数值模拟 动态力学性能 本构关系 真应变 

分 类 号：TG139[一般工业技术—材料科学与工程]