JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Hourglass Control in Rigid-Plastic Finite Element Analysis
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Hourglass Control in Rigid-Plastic Finite Element Analysis
Gang, Jeong-Jin; O, Su-Ik;
  PDF(new window)
 Abstract
The finite element method, based on rigid-plastic formulation, is widely used to simulate metal forming processes. In order to improve the computational efficiency of the rigid-plastic FEM, one-point integration is used to evaluate the stiffness matrix with four-node rectangular elements and eight-node brick elements. In order to control the hourglass modes, hourglass strain rate components were introduced and included in the effective strain rate definition, Numerical tests have shown that the proposed one-point integration scheme reduces the stiffness matrix evaluation time without deteriorating the convergence behavior of Newton-Raphson method. Simulations of a ring compression, a plane-strain closed-die forging and the three-dimensional spike forging processes were carried out by using the proposed integration method. The simulation results are compared to those obtained by applying the conventional integraiton method in terms of the solution accuracy and computational efficiency.
 Keywords
Rigid-Plastic FEM;One-Point Integration;Hourglass Modes;
 Language
Korean
 Cited by