Dynamic Cylindrical Cavity Expansion Model and Its Application to Penetration Problems
Dynamic Cylindrical Cavity Expansion Model and Its Application to Penetration Problems
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发表时间：
2006-03
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通讯作者：
H. Zhou;H. Wen
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作者：
H. Zhou;H. Wen
研究了动态圆柱空腔膨胀模型及其在侵彻问题中的应用。考虑了不可压缩和可压缩双线性应变硬化材料模型。首先，根据塑性波前速度、径向应力分布和腔表面应力获得动态圆柱腔膨胀（DCCE）的解。讨论了压缩性、弹塑性本构方程和塑性模量等材料特性的影响。基于 DCCE 模型，构建渗透方程。与实验渗透数据的比较显示理论与实验之间的合理吻合。它还表明，材料特性（例如塑性模量）对动态空腔膨胀及其抗穿透性有相当大的影响。
Dynamic cylindrical cavity expansion model and its application to penetration problems were studied. Both incompressible and compressible bilinear strain-hardening material models were considered. First, solutions for dynamic cylindrical cavity expansion (DCCE) are obtained in terms of the velocity of plastic wave front, radial stress distribution and stress on the cavity surface. The influence of material properties such as compressibility, elastic-plastic constitutive equations and plastic modulus is discussed. Based on the DCCE models, penetration equations are then constructed. Comparison with experimental penetration data shows reasonable agreement between theory and experiment. It also shows that material properties such as plastic modulus have considerable effects on the dynamics cavity expansion and its resistance to penetration.