PREDICTION of NON LINEAR VISCO-ELASTIC DEFORMATIONS

摘要

Long term deformations of complex products can be predicted using Finite Element Method (FEM) calculations. To demonstrate the possibilities of computer simulation of the long term behavior in the design stage an air inlet has been taken as an example. A problem in this prediction was to obtain accurately measure relevant creep and recovery data. Before carrying out FEM calculations the non-linear material behavior must be modeled in an appropriate way for the FEM calculations. The long term deformation can be predicting using commercial FEM programs like MSC-MARC. User subroutines are required to carry out analyses accounting for the non-linear visco-elastic behavior. Experimental verification is required to obtain confidence in the material modeling and the non-linear visco-elastic FEM calculations.