Development of Estimation Method of Support Reaction Distribution in Sandwich Panel by Inverse Analysis of Deformed Shape Data

(Experimental Verification Using Cylindrical Core)

Abstract

Sandwich panel is easily deformed by local compressive load. In order to evaluate the mechanical property of the sandwich panel subjected to local compression, it is important to estimate the support reaction of the cell wall. This paper describes a novel method to estimate the support reaction by inverse analysis of the deformed shape data of the face sheet. In this method, the finite element method which is based on incremental strain theory is applied to the face sheet using the measured deflection of the face sheet as the boundary condition. Then it estimates the load of the face sheet that is equivalent to the support reaction. In order to demonstrate the validity of the proposed method, the experiment using the specimen with the cylindrical core material have been conducted. Then the inverse analysis was applied on the experimental data. The results show that the estimated distributions of the support reaction have good agreement with the correct value measured in the experiment.