THREE-DIMENSIONAL FOAM ANALYSIS METHOD, PRODUCT DESIGN AIDING METHOD USING THE ANALYSIS METHOD, AND RECORDING MEDIUM RECORDING THESE METHODS

摘要

A finite element method to analyze a foaming flow behavior of the foaming material (5) by obtaining a flow velocity and a pressure by inputting the density as a function including a term of the elapsed time from the passage through an injection port to the foaming die (4) and the thickness term and substituting a density calculated at a time in an equation of continuity and an equation of motion. In the analysis method, the viscosity of the foaming material (5) is used as a function including a time term. The boundary and molding conditions are corrected when the calculation does not converge. The density and pressure distributions of the foaming material (5) are determined when the calculation converges. When the density and pressure distributions depart from design tolerances, the foaming passage structure and foaming material (5) injected amount can be regulated by using an analysis program that corrects a model form, physical property value or molding condition of the foaming material (5).