| Title |
Elasto-Plastic Dynamic Analysis of Solids by Using SPH without Tensile Instability |
| Keywords |
SPH;tensile instability;impact;fracture;elasto-plastic;인장불안정;충돌;절단;탄소성 |
| Abstract |
In this paper elasto-plastic dynamic behavior of solid is analyzed by using smoothed particle hydrodynamics (SPH) without tensile instability which caused by a clustering of SPH particles. In solid body computations, the instability may corrupt physical behavior by numerical fragmentation which, in some cases of elastic or brittle solids, is so severe that the dynamics of the system is completely wrong. The instability removed by using an artificial stress which introduces negligible errors in long-wavelength modes. Applications to several test problems show that the artificial stress works effectively. These problems include the collision of rubber cylinders, fracture and crack of plate. |