Numerical simulation of dynamic fracture of concrete through uniaxial tension and L-specimen
Numerical simulation of dynamic fracture of concrete through uniaxial tension and L-specimen
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DOI：
10.1016/j.engfracmech.2012.02.013
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发表时间：
2012-05-01
影响因子：
5.4
通讯作者：
Sharma, Akanshu
中科院分区：
文献类型：
--
作者：
Ozbolt, Josko;Sharma, Akanshu
采用单轴拉伸和L试件，对混凝土的动态断裂进行了数值模拟。作者以前的工作展示了一些有趣的方面，如裂纹分支超过阈值裂纹速度。由于加载点附近的局部问题，混凝土在动态荷载作用下的单轴拉伸行为即使在数值上也很难研究。试件的设计是为了对动态拉伸行为进行数值评估，这种行为似乎足够实用，也可以进行实验研究。结果表明，存在裂纹分叉、截断和再分叉等多种现象。L试件的动态行为表明，裂纹扩展方向强烈地依赖于位移速率。(C)2012爱思唯尔有限公司。保留所有权利。
Dynamic fracture of concrete is numerically evaluated using uniaxial tension and L-specimen. Previous work by authors demonstrated interesting aspects such as crack branching beyond threshold crack speed. Uniaxial tensile behaviour of concrete under dynamic loads is difficult to study even numerically due to local problems near loading points. A specimen is designed to numerically assess the dynamic tensile behaviour that seems to be practical enough for carrying out experimental studies as well. The results demonstrate various phenomena such as crack branching, intercepting and re-branching. Dynamic behaviour of L-specimen shows that the direction of crack propagation strongly depends on displacement rate. (C) 2012 Elsevier Ltd. All rights reserved.