高应变率下弹道明胶的本构模型研究

doi:10.3969/j.issn.1000-1093.2014.01.019

兵工学报 ›› 2014, Vol. 35 ›› Issue (1): 128-133.doi: 10.3969/j.issn.1000-1093.2014.01.019

高应变率下弹道明胶的本构模型研究

温垚珂¹，徐诚¹，陈爱军²

(1.南京理工大学机械工程学院，江苏南京 210094; 2.南京理工大学理学院，江苏南京 210094)

收稿日期:2013-04-10 修回日期:2013-04-10 上线日期:2014-03-18
通讯作者: 温垚珂 E-mail:wenyk2011@163.com
作者简介:温垚珂(1986—)，男，博士研究生

Study of Constitutive Model of Ballistic Gelatin at High Strain Rate

WEN Yao-ke¹, XU Cheng¹ , CHEN Ai-jun²

(1.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;2.School of Science, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)

Received:2013-04-10 Revised:2013-04-10 Online:2014-03-18
Contact: WEN Yao-ke E-mail:wenyk2011@163.com

摘要/Abstract

摘要： 为了更好地进行枪弹和破片终点效应的数值模拟工作，综述了弹道明胶物理性质的实验研究现状；分析了应变率相关超弹性本构模型和流体弹塑性本构模型的特点，结合相关实验数据推导得到了弹道明胶的状态方程系数；进行了球形杀伤元高速侵彻弹道明胶的实验，并建立了对应的有限元模型；两种不同本构模型得到的数值结果与实验数据的对比表明，在高应变率下流体弹塑性本构模型能更好地模拟弹道明胶响应。弹道明胶虽然是一种应变率敏感材料，但在高应变率下由高压导致的材料可压缩性占主导，其物理响应可以用一定形式的动载本构关系（流体弹塑性本构）予以近似。

关键词: 兵器科学与技术, 弹道明胶, 应变率, 流体弹塑性, 数值模拟

Abstract: In order to numerically simulate the terminal effect of bullet and fragment, the research status of ballistic gelatin physical properties is summarized firstly. The features of rate-dependent hyperelastic model and elastic-plastic hydrodynamic model are studied, respectively. The coefficients of equation of state of ballistic gelatin are concluded based on related experiments. The penetration of a steel sphere into a block of ballistic gelatin is studied experimentally, and is modeled using the finite element method. The comparison of the computed and experimental results shows that the elastic-plastic hydrodynamic model can simulate the experiment more accurately at high velocity impact. Ballistic gelatin is known as a rate-dependent sensitively material, but the thermal softening is dominant at high strain rate, the physical behavior can be modeled with a dynamical constitutive.

Key words: ordnance science and technology, ballistic gelatin, strain rate, elastic-plastic hydrodynamic, numerical simulation

中图分类号:

O347.3

温垚珂，徐诚，陈爱军. 高应变率下弹道明胶的本构模型研究[J]. 兵工学报, 2014, 35(1): 128-133.

WEN Yao-ke, XU Cheng , CHEN Ai-jun. Study of Constitutive Model of Ballistic Gelatin at High Strain Rate[J]. Acta Armamentarii, 2014, 35(1): 128-133.

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高应变率下弹道明胶的本构模型研究

Study of Constitutive Model of Ballistic Gelatin at High Strain Rate

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