TC4钛合金板冲塞失效机理研究  

Study on plugging failure mechanism of TC4 titanium alloy plate

作　　者：余洪 刘俊[1] 孟玉堂[1] 雷天才[1] YU Hong;LIU Jun;MENG Yutang;LEI Tiancai(Institute of Machinery Manufacturing Technology,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900

出　　处：《兵器材料科学与工程》2023年第2期123-131,共9页Ordnance Material Science and Engineering

摘　　要：用7.62 mm普通钢芯弹对TC4钛合金板进行侵彻试验,通过引入Johnson-Cook本构模型和Gissmo损伤模型模拟冲塞失效行为,对侵彻过程和弹孔微观形貌进行分析。结果表明:数值模拟与试验结果较一致。靶板的冲塞过程可分为开坑、塞柱形成、塞柱推出阶段,各阶段的能量吸收值分别为665(占比84.39%)、73(占比9.26%)、50 J(占比6.35%),在塞柱形成阶段靶板的能量吸收能力急剧弱化。靶板损伤区域可分为开坑区、剪切区和撕裂区,分别由不同的应力状态决定,其中剪应力状态下塑性应变积累导致裂纹萌生。进一步研究发现靶板在剪切区域内发生塑性变形局域化,温度可达800℃以上。The penetration test of TC4 titanium alloy plate was carried out using 7.62 mm ordinary steel core projectile. The Johnson-Cook constitutive model and Gissmo damage model were introduced to simulate the plugging failure behavior,and the penetration process and morphology of bullet holes were analyzed. The results show that the numerical simulation results are in good agreement with the experimental results. The plugging process of the target plate can be divided into the cratering stage,the plug formation stage,and the plug acceleration stage. The energy absorption values of each stage are 665 J(84.39%),73 J(9.26%)and 50 J(6.35%),respectively. The energy absorption capacity of the target plate is sharply weakened during the plug formation stage. The damaged zones can be divided into cratering zone,shear failure zone and tearing failure zone,produced by the different stress states. Moreover,cracks are induced by the accumulation of plastic deformation under the shear stress state.Further study shows that the target plate undergoes the localized deformation in the shear zone,causing the temperature to reach above 800 ℃.

关 键 词：TC4钛合金 数值模拟 冲塞失效 能量吸收 

分 类 号：TG146.23[一般工业技术—材料科学与工程]