以子弹穿甲钢板为例,提供两种模拟破片 碎片纷飞的方法:
1) 采用 *CONSTRAINED_TIED_NODES_FAILURE 建立单元之间的弱连接,当目标变量达到罚值,单元之间的连接失效,从而实现碎片分离的效果,动画如下:
lspp提供了*CONSTRAINED_TIED_NODES_FAILURE单元集合建立的快捷方式!很方便
2)采用*DEFINE_ADAPTIVE_SOLID_TO_SPH_ID
失效的单元会采用SPH颗粒的形式进行离散,但是part却不采用SPH建模
Adaptively transform a Lagrangian solid Part or Part Set to SPH particles, when the Lagrangian solid elements comprising those parts fail. One or more SPH particles (elements) will be generated for each failed element. The SPH particles replacing the failed element inherit all of the properties of the failed solid element, e.g. mass, kinematic variables, and constitutive properties.
结果如下:
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