Failure Modes of Composite Sandwich Beams

A Theoretical and Experimental Study of Failure Maps of Sandwich Beams with Composite Skins and Honeycomb Core

Failure maps of sandwich panels such as beam, plate and shell are of great importance in designing such structures. In this paper, failure maps of sandwich beams with composite skin and honeycomb core are obtained. The effect of transverse shear in skins and core and the effect of double walls of honeycomb core have been taken into account. Shear deformation of skins and core are assumed to be ...

Quasistatic Deformation and Failure Modes of Composite Square Honeycombs

Carbon fibre epoxy matrix composite honeycombs have been fabricated by slotting, assembling and adhesively bonding composite laminate sheets with various fibre architectures. Their out-of-plane compressive and in-plane shear responses were measured as a function of relative density, ratio of the cell height to width and the number of cells in the specimen. The measurements indicate that the res...

Growth of Interfacial Cracks in Sandwich Beams

Debonding between core and facings is a common failure mode of sandwich structures that can severely damage the load-carrying capacity of the structure. The objective of this work is to study the effect of debonding in double cantilever beam specimens made of aluminum facings and PVC foam cores. The configuration follows the standard ASTM D5528-94a peel test. Four PVC foam core materials under ...

Simulation of Characteristic of Linear Degradation with Failure Modes

The effect of temperature on the failure modes of polymer foam cored sandwich structures

The influence of elevated temperature on the stability of sandwich structures is investigated. A new analytical solution is proposed that enables the calculation of the critical wrinkling stress in sandwich beams subjected to load and elevated temperatures. The effect of a through thickness temperature gradient is accounted for by imposing different stiffnesses of the core for the different tem...