Numerical Analysis of Coupled Finite Element with Meshfree in Bulging Process of Sheet Elastic Flexible-Die Forming

2011 ◽  
Vol 189-193 ◽  
pp. 2054-2057
Author(s):  
Zhong Jin Wang ◽  
Bin Xian Yuan ◽  
Jian Guang Liu
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Sheet Metal ◽  
Analysis Method ◽  
Element Free Galerkin Method ◽  
Element Free Galerkin ◽  
Flexible Die Forming ◽  
Element Free ◽  
Flexible Die ◽  
Die Forming

Sheet flexible-die forming processes have been playing a good application on sheet metal forming in the industry field. Because of the coupled deformation between sheet metal and flexible-die, it is necessary to utilize numerical simulation technology to analyze it. In this paper, a numerical analysis method for coupling the deformation of sheet metal and flexible-die is developed. The deformation of sheet metal is analyzed with finite element method (FEM) and the bulk deformation of flexible-die is analyzed with the Element free Galerkin method (EFGM). The sheet flexible-die bulging process is analyzed with the developed FEM-EFGM method. This paper proposes a suitable numerical method to analyze sheet flexible-die forming.

A Coupled Finite Element-Element Free Galerkin Method for Liquefiable Soil-Structure Interaction Analysis Under Earthquake Loading

2009 ◽  
Author(s):  
Xiaowei Tang ◽  
Ying Jie ◽  
Maotian Luan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Galerkin Method ◽  
Soil Structure ◽  
Soil Structure Interaction ◽  
Element Free Galerkin Method ◽  
Structure Interaction ◽  
Element Free Galerkin ◽  
Liquefiable Soil ◽  
Element Free

This study presents a numerical method for the seismic behavior assessment of liquefiable soil-structure interaction. In the method, the element-free Galerkin method (EFGM) is applied to simulate the behavior of the liquefiable sandy soil which will take place large permanent deformation under earthquake loading. The finite element method (FEM) is used to describe the behavior of the structure. Then, the EFGM and FEM are related by contact elements. The cyclic elasto-plastic constitutive model and updated Lagrangian large-deformation formulation are jointly adopted to establish the governing equations in order to take account for both physical and geometrical nonlinearities. The shape function is established by moving least squares method while hexahedral background cells are used. The essential boundary conditions are treated with the help of the penalty method. The coupled method can avoid the volumetric locking in the numerical computations using finite element method when non-uniform deformations happen. In order to assess the effectiveness and accuracy of the current procedure, numerical simulation of caisson-type quay wall subjected to earthquake motion is conducted.

Sign in / Sign up

Export Citation Format

Share Document