基于SPH算法对混凝土裂纹扩展研究  

Crack propagation of concrete based on SPH algorithm

作　　者：李运禄 尹建平[1] 王志军[1] 王义鼎 

机构地区：[1]中北大学机电工程学院,山西太原030051

出　　处：《兵器材料科学与工程》2015年第5期19-22,共4页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(11402027);山西省高等学校科技创新项目(2013131)

摘　　要：为研究混凝土在冲击载荷作用下的裂纹扩展,用非线性动力学软件AUTODYN-2D、扩展性Drucker-Prager强度模型,采用SPH算法对混凝土在冲击载荷作用下的裂纹形成过程进行数值模拟。分析混凝土在冲击载荷作用下的裂纹扩展情况,研究弹体不同速度对裂纹扩展的影响。结果表明,采用扩展性模型Drucker-Prager能够合理地描述混凝土裂纹的扩展现象。在本研究条件下,当速度小于650 m/s,混凝土裂纹扩展的最大直径随着速度的增加而增大;当速度大于650 m/s,混凝土裂纹扩展的最大直径呈先增大后不变的现象。In order to study the crack propagation of concrete under impact load, the nonlinear dynamics software AUTODYN-2D was used to simulate the process of penetration with the expanded Drucker-Prager strength model and the algorithm of SPH for the concrete. The cracks propagation of concrete Under impact load, as well as the influence of different projectile velocity on the crack propagation were analyzed. The analysis results show that the extended Drucker-Prager model can reasonably describe the propagation phenomenon of concrete crack. When the velocity is less than 650 m/s, the largest diameter of concrete crack propagation increases with the increase of velocity. When the velocity is more than 650 m/s, the largest diameter of concrete crack propagation increases at first and then basically remains unchanged.

关 键 词：SPH算法 混凝土 裂纹扩展 本构模型 

分 类 号：TJ413[兵器科学与技术—火炮、自动武器与弹药工程]