| Computational Simulation of Hypervelocity Penetration Using Adaptive SPH Method |
| |
| 引用本文： | QIANG Hongfu,MENG Lijun (No.201 Faculty,Xi'an Hi-Tech Institute,Xi'an 710025,China, No. 803 Faculty,Northwestern Polytechnical University,Xi'an 710072,China). Computational Simulation of Hypervelocity Penetration Using Adaptive SPH Method[J]. 天津大学学报(英文版), 2006, 12(Z1) |
| |
| 作者姓名： | QIANG Hongfu MENG Lijun (No.201 Faculty Xi'an Hi-Tech Institute Xi'an 710025 China No. 803 Faculty Northwestern Polytechnical University Xi'an 710072 China) |
| |
| 作者单位： | No.201 Faculty，Xi'an Hi-Tech Institute，Xi'an 710025，China; No. 803 Faculty，Northwestern Polytechnical University，Xi'an 710072，China |
| |
| 摘 要： | The normal hypervelocity impact of an Al-thin plate by an Al-sphere was numerically simulated by using the adaptive smoothed particle hydrodynamics (ASPH) method. In this method, the isotropic smoothing algorithm of standard SPH is replaced with anisotropic smoothing involving ellipsoidal kernels whose axes evolve automatically to follow the mean particle spacing as it varies in time, space, and direction around each particle. Using the ASPH, the anisotropic volume changes under strong shock condition are captured more accurately and clearly. The sophisticated features of meshless and Lagrangian nature inherent in the SPH method are kept for treating large deformations, large inhomogeneities and tracing free surfaces in the extremely transient impact process. A two-dimensional ASPH program is coded with C . The developed hydrocode is examined for example problems of hypervelocity impacts of solid materials. The results obtained from the numerical simulation are compared with available experimental ones. Good agreement is observed.
|
Computational Simulation of Hypervelocity Penetration Using Adaptive SPH Method |
| |
| QIANG Hongfu,MENG Lijun. Computational Simulation of Hypervelocity Penetration Using Adaptive SPH Method[J]. Transactions of Tianjin University, 2006, 12(Z1) |
| |
| Authors: | QIANG Hongfu MENG Lijun |
| |
| Abstract: | The normal hypervelocity impact of an Al-thin plate by an Al-sphere was numerically simulated by using the adaptive smoothed particle hydrodynamics (ASPH) method. In this method, the isotropic smoothing algorithm of standard SPH is replaced with anisotropic smoothing involving ellipsoidal kernels whose axes evolve automatically to follow the mean particle spacing as it varies in time, space, and direction around each particle. Using the ASPH, the anisotropic volume changes under strong shock condition are captured more accurately and clearly. The sophisticated features of meshless and Lagrangian nature inherent in the SPH method are kept for treating large deformations, large inhomogeneities and tracing free surfaces in the extremely transient impact process. A two-dimensional ASPH program is coded with C . The developed hydrocode is examined for example problems of hypervelocity impacts of solid materials. The results obtained from the numerical simulation are compared with available experimental ones. Good agreement is observed. |
| |
| Keywords: | adaptive SPH hypervelocity penetration meshfree method numerical simulation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
