1. College of Mechanical and Electrical Engineering, East China Jiaotong University, Nanchang 330013, China；
2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
Abstract：SPH method has many advantages and has been widely used in high-velocity impact simulation, but its practical applications are still restricted by its low computational efficiency, which mainly results from time-consuming neighboring particle search. To improve the efficiency, a modified Point-In-Box (PIB) search algorithm is employed to determine neighboring particles. Using the SPH with modified PIB search algorithm, we simulate a series of impact problems including Taylor tests and steel plate impacted by blunt projectile. Calculated results indicate that SPH can effectively simulate large deformations and adiabatic shear failure during the impact processes and gives results in good agreements with experiments. The results also show that using the modified PIB search algorithm make the SPH method achieve much better efficiency compared with using a traditional search algorithm.
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