Investigation for Deformation Analysis of Ground using Improved Smoothed Particle Hydrodynamics Method

Abstract

In order to solve large deformation problem of geomaterials, the SPH method is used which is a kind of particle method based on the meshless Lagrangian scheme. The method can solve large deformation problems without mesh distortion. Moreover, it can handle the governing equations and existing constitutive models for geomaterials based on a continuum mechanics. However, numerical inaccuracy is one of the disadvantages of this conventional SPH method. In this paper, the improved methods (CSPM and SSPH method) were introduced comparing them with the conventional method in terms of the numerical accuracy. Verification of discretization accuracy of spatial gradient and validation of a simulation of simple shear problem of elastic and elasto-plastic materials were carried out using these methods. As a results, it was confirmed that it is possible to significantly improve the numerical accuracy using SSPH method.