Abstract
This article explains in some details the behaviour of thick, deep cylindrical sandwich panels subjected to compressive loads. In general, experimental results indicated that two different forms of failure have been observed – the first corresponds to the overall buckling and the second to the facesheet wrinkling. The obtained experimentally damages of shells are verified and validated with the use of the FE analysis, 2-D and 3-D both in the linear and non-linear approach. The unidirectional strain gauges were applied to detect the initiation of the overall buckling mode.
Highlights
Innovative high performance design of load bearing components/structures/machines is always sought in high tech applications
For the first pair of sandwich panels the experimental results are plotted in Fig. 7 together with the numerical predictions of deformations using linear and non-linear buckling analysis and with the results obtained from the middle strain gauge (Fig. 5)
Experimental and numerical results have been presented dealing with the failure analysis of curved, deep, thick cylindrical panels made of cellular honeycomb and composite faces
Summary
Innovative high performance design of load bearing components/structures/machines is always sought in high tech applications. These constructions should be as light as possible while having high stiffness, sufficient strength and some damage tolerance. Amongst all possible design concepts in composite structures the idea of sandwich construction has become increasingly popular because of the development of man made cellular materials as core materials. Classical sandwich (CS) structures consist of: a pair of thin stiff strong skins (faces, facings or covers), a thick, lightweight core
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