Modeling the high strain rate behavior of titanium undergoing ballistic impact and penetration
Modeling the high strain rate behavior of titanium undergoing ballistic impact and penetration
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DOI：
10.1016/s0734-743x(01)00107-5
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发表时间：
2001-12-01
影响因子：
5.1
通讯作者：
Kleponis, DS
中科院分区：
文献类型：
--
作者：
Meyer, HW;Kleponis, DS
钛是寻找更轻重量装甲的重要候选材料。越来越多地被认为是钢构件的替代品。它也是陶瓷应用于装甲系统的重要组成部分，特别是在装甲模块中，能够击败动能穿透器，同时维持陶瓷元件的很少或没有穿透。目前最适合弹道应用的合金是Ti-6A 1 -4V，这是一种航空级钛合金。阻碍这种合金广泛用作装甲材料的主要因素是成本，而成本的很大一部分是在加工过程中。因此，美国陆军研究实验室开展了一项研究特定低成本加工技术的计划[1]。这项工作的目标是通过生成Johnson-Cook（JC）和Zerilli-Armstrong（ZA）强度模型的常数来表征低成本钛合金，并在弹道实验模拟中使用和比较这两种模型。低成本钛合金的高应变率强度数据用于生成两个模型的参数。拟合JC参数的方法遵循先前成功用于模拟2英寸厚轧制均质装甲（RHA）的方法[2]。拟合ZA参数的方法基于Gray等人[3]描述的方法。在冲击物理代码CTH [4]中使用所得的模型参数来模拟Ti-6A 1 -4V侵彻体以高达2，000 m/s的冲击速度穿透Ti-6A 1 -4V半无限块。进行类似的实验，并将两个模型的预测相互比较，并与实验结果进行比较。(C)2001爱思唯尔科技有限公司版权所有。
Titanium is an important candidate in the search for lighter weight armors. Increasingly, it is being considered as a replacement for steel components. It is also an important component in the application of ceramics to armor systems, especially in armor modules that are capable of defeating kinetic energy penetrators while sustaining little or no penetration of the ceramic element. The best alloy available today for ballistic applications is Ti-6A1-4V, an aerospace grade titanium alloy. The principal deterrent to widespread use of this alloy as an armor material is cost, and a significant portion of the cost is in processing. Consequently, the U.S. Army Research Laboratory undertook a program to study a particular lower cost processing technique [1].The objectives of this work are to characterize the low-cost titanium alloy by generating constants for the Johnson-Cook (JC) and Zerilli-Armstrong (ZA) strength models, and to use and compare these two models in simulations of ballistic experiments. High strain rate strength data for the low-cost titanium alloy are used to generate parameters for the two models. The approach to fitting the JC parameters follows one previously used successfully to model 2-in thick rolled homogeneous armor (RHA) [2]. The approach to fitting the ZA parameters is based on a method described by Gray et al. [3]. The resulting model parameters are used in the shock physics code CTH [4] to model a Ti-6A1-4V penetrator penetrating a Ti-6A1-4V semi-infinite block at impact velocities up to 2,000 m/s. Similar experiments are performed, and the predictions of the two models are compared to each other and to the experimental results. (C) 2001 Elsevier Science Ltd. All rights reserved.