Waterjet penetration simulation by hybrid code of SPH and FEA
Waterjet penetration simulation by hybrid code of SPH and FEA
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DOI：
10.1016/j.ijimpeng.2007.05.007
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发表时间：
2008-09-01
影响因子：
5.1
通讯作者：
Guo, Yi-mu
中科院分区：
文献类型：
--
作者：
Ma, Li;Bao, Rong-hao;Guo, Yi-mu
这项工作的创新之处在于将有限元分析（FEA）和光滑颗粒流体动力学（SPH）方法相结合，模拟了水射流（WJ）的穿透过程。在水射流侵彻过程中，水射流发生极大的变形，会引起有限元分析中网格的畸变。为了克服这一困难，提出了SPH与有限元耦合的方法，该方法采用SPH粒子模拟水射流，采用有限元模拟靶材。两部分通过“节点到曲面”的接触算法进行交互。利用该混合模型，计算了高速水射流穿透靶材的过程，并描述了冲蚀机理。计算结果给出了射流速度与冲蚀能力的关系，包括侵彻深度和冲蚀质量，并与实验数据进行了比较。(C) 2007年Elsevier Ltd.出版
The creativity of this work is combining finite element analysis (FEA) and smoothed particle hydrodynamics (SPH) methods to simulate the waterjet (WJ) penetration process. In WJ penetration, the waterjet undergoing extremely large deformation will introduce the distortion of mesh in FEA. To overcome this difficulty, the coupled method of SPH and FEA was developed, in which the waterjet was modeled by SPH particles and the target material was modeled by finite elements. The two parts interacted by contact algorithm of "nodes-to-surface". Utilizing this hybrid model, waterjet with high velocity penetrating the target materials was calculated and the mechanism of erosion was depicted. The computation result gives the relationship between the jet velocity and the erosion capacity, including the depth of penetration and mass removal, which was compared with the experimental data. (C) 2007 Published by Elsevier Ltd.