Modeling of interactive buckling in sandwich struts with functionally graded cores
Journal
Journal of Engineering Mechanics
Date Issued
August 2013
DOI
10.1061/(ASCE)EM.1943-7889.0000470
Abstract
An analytical pilot model for interactive buckling in sandwich struts with cores made from a functionally graded material based on total potential energy principles is presented. Using a Timoshenko beam approach, a system of nonlinear differential and integral equations is derived that predicts critical and secondary instabilities. These are validated against numerical simulations performed within the commercial finite-element package Abaqus. Good agreement is found, and this offers encouragement for more elaborate models to be devised that can account for face-core delamination—a feature where functionally graded materials are known to offer distinct advantages.