SHAPE OPTIMISATION OF AN INTERNAL METAL DOUBLER FOR LOAD INTRODUCTION IN SANDWICH STRUCTURES

摘要

This paper deals with numerical shape optimisation of "pre-fitted" internal metal doublers (IMD), potentially suitable for serial production of sandwich structural components. The shape of an IMD is optimised by using the structural optimisation code OASIS-ALADDIN in order to obtain a more even stress distribution in the core and to minimise its weight. Numerical shape optimisation is performed for sandwich panels subjected to a transverse tension loading. Bi- and trimaterial corners, causing singular stress fields, are treated using a point stress criterion.