Penalty-based surface-to-surface contact algorithm for SPH method
Penalty-based surface-to-surface contact algorithm for SPH method
复制标题
SPH 方法中基于惩罚的面接触算法
DOI：
10.1016/j.apm.2022.12.038
复制
发表时间：
2022-12
影响因子：
5
通讯作者：
Kun Liu
中科院分区：
文献类型：
--
作者：
Yihua Xiao;Kun Liu
由于粒子之间缺乏连通性，接触处理是SPH方法的一个挑战性问题。目前，粒子间接触算法常用于SPH模拟中的接触处理。然而，这种接触算法需要估计边界粒子的尺寸和法向量，这可能会显着影响计算精度和稳定性。本文提出了一种新的基于罚函数的面-面SPH接触算法。该算法采用α-shape方法重建物体表面。通过盒测试和交叉测试检测物体之间的接触。接触边界条件通过罚函数法施加。将所提出的接触算法应用于一系列固体力学问题的计算。分析了参数对接触算法精度的影响。将该接触算法的计算结果与粒子间接触算法的计算结果进行了比较。数值结果表明，该接触算法对无摩擦和有摩擦问题都能达到较好的计算精度，能够处理涉及极大变形和材料破碎的高速碰撞问题，且性能上级粒子间接触算法.
Contact treatment is a challenging problem for SPH method due to the lack of connectivity between particles. Currently, particle-to-particle contact algorithms are often used to treat contacts in SPH simulation. However, such contact algorithms need to estimate sizes and normal vectors of boundary particles, which may significantly affect computational accuracy and stability. In this paper, a new penalty-based surface-to-surface SPH contact algorithm is proposed. In the algorithm,α-shape method is employed to reconstruct object surfaces. Contacts between objects are detected through box test and crossover test. Contact boundary conditions are imposed by a penalty method. The proposed contact algorithm is applied to calculating a series of solid mechanics problems. Parameter influence on the accuracy of the contact algorithm is analyzed. The results of the proposed contact algorithm are compared with those of particle-to-particle contact algorithm. Numerical results show that the proposed contact algorithm can achieve good accuracy for frictionless and frictional problems and is capable of handling high-velocity impact problems which involve extremely large deformation and material fragmentation, and it shows superior performance than particle-to-particle contact algorithm.
登录
查看更多内容
DOI：
10.1016/j.cpc.2006.06.015
发表时间：
2006-11
期刊：
Comput. Phys. Commun.
影响因子：
--
作者：
Songwon Seo;O. Min
通讯作者：
Songwon Seo;O. Min
影响因子：
3.3
作者：
R. Vacondio;C. Altomare;M. de Leffe;Xiangyu Y. Hu;D. Le Touzé;S. Lind;J. Marongiu;S. Marrone;B. Rogers;A. Souto-Iglesias
通讯作者：
R. Vacondio;C. Altomare;M. de Leffe;Xiangyu Y. Hu;D. Le Touzé;S. Lind;J. Marongiu;S. Marrone;B. Rogers;A. Souto-Iglesias
影响因子：
2.5
作者：
EDELSBRUNNER, H;KIRKPATRICK, DG;SEIDEL, R
通讯作者：
SEIDEL, R
DOI：
10.1201/9781315373140-19
发表时间：
2016-11
期刊：
Simulation of Additive Manufacturing using Meshfree Methods
影响因子：
--
作者：
Donald H. House;John Keyser
通讯作者：
Donald H. House;John Keyser
影响因子：
7.3
作者：
J. Young;F. Teixeira-Dias;A. Azevedo;F. Mill
通讯作者：
J. Young;F. Teixeira-Dias;A. Azevedo;F. Mill