Impact analysis of a dropped object using static finite element software

Abstract

The purpose ofthis study was to develop a method to solve impact problems using a static finite element analysis software package. This allows an engineer to approximate the stresses in a body when it is dropped and strikes the ground or supports. This is intended mainly for use when an advanced finite element package that solves dynamic problems is not available. The FEA package is utilized in two aspects. First, deflection information is found to evaluate a static load distribution equivalent to the loads experienced due to the impact. Second, this static equivalent load is placed on the FEA model, and the impact stresses and deflections are calculated. The problem of a simply supported beam was used to illustrate and verify the method. First, the method developed in this work was used to predict stresses and strains in a test beam. Second, the test beam was dropped in the laboratory and experimental strains were recorded. The results of these two methods were then compared, which indicates the validity ofthis work. This method can be easily applied to more complicated structures.