Coupling of smoothed particle hydrodynamics with finite element method using attachment algorithm
The difficulties of finite element method (FEM) are especially evident when simulating problems with large deformation. Smoothed particle hydrodynamics (SPH) can handle severe distortions, but it has the inherent difficulties like tensile instability, essential boundary condition and high computational cost. This paper presents an attachment algorithm for the coupling of SPH and FEM. In the interface between SPH and FEM, SPH particles are attached to finite element grids in 3D. On the FE node side of the interface, every node is assigned a background particle, and the calculating results of FE nodes are transferred to the corresponding background particles at the start of each time step. On the SPH particle side of the interface, FE nodes are added to SPH neighbor search algorithm by way of background particles. Any FE node or SPH particle that is in the effective region will be added to the neighbor list, and the continuity of the interface is guaranteed. The attachment algorithm offers advantages in modeling problems with extreme deformations within a Lagrangian framework. Some numerical examples demonstrate the performance of the attachment algorithm.
SPH FEM attachment algorithm background particle continuity
Zhichun Zhang Hongfu Qiang Weiran Gao
Xi’an Hi-Tech Institute, Xi’an 710025, China
国际会议
南京
英文
146-154
2009-10-12（万方平台首次上网日期，不代表论文的发表时间）