摘要
在当前弹体侵彻混凝土介质的空腔膨胀模型的基础上,引入了Darwin-Pechnold本构模型,将混凝土的等效单轴应力-应变关系取为Saenz的单轴受压压力-应变关系,采用Kupfe破坏准则来描述混凝土材料弹塑性区的力学行为,发展了正交异性空腔膨胀模型。通过试验验证该模型,其预测侵彻深度的结果与试验结果有较好的一致性。该模型能够有效地反映侵彻过程中混凝土材料的力学现象,使得空腔膨胀模型在侵彻问题中的应用更为明确与简化。
Based on the extensive using spherical cavity expansion model in the penetration concrete subjected to projectile, with the Darwin-Pechnold constitutive model, taking Saenz uniaxial compression stress strain relationship instead of equivalent uniaxial stress-strain relationship of concrete,the orthogonal anisotropic cavity expansion model is developed by using Kupfe failure criterion to describe the mechanical behavior of concrete. The predicated model of penetration depth is in reasonable agreement with the experimental results. The model can reflect the real physical phenomenon of concrete material, so the use of spherical cavity expansion model is expanded and simplified in the problem of penetration.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2016年第4期381-385,共5页
Journal of Nanjing University of Science and Technology
关键词
本构模型
破坏准则
正交异性空腔膨胀
弹体
混凝土
侵彻深度
开坑深度
开坑直径
constitutive models
failure criterion
orthotropic cavity explosion
projectiles
concretes
penetration depth
crater depth
crater diameters
