Abstract
The effect of loading core material beyond its yield limit on sandwich panel behavior is investigated. Different core materials of different stiffness are studied. The panel modeled using a finite element analysis package. Simply supported boundary conditions are applied on all sides of the panel. The effect of core stiffness is investigated parametrically by utilizing univariate search optimization technique. The load has been increased in quasi–static steps till face sheets reach the yield point. The model has been validated analytically and experimentally for selected cases. The finite element model results show very good agreement with the analytical and the experimental results investigation. It is proved in this study that the load carrying capacity of the panel increases as the core material goes beyond the yield point. Load transmitted to the face sheets increases as the core stiffness gets softer. As core material is getting stiffer face sheets of sandwich panel yield before the core.
Highlights
New materials typically bring new challenges to designer who utilizes these new materials
The face skins act like the flanges of an I-beam whereas the core works like web by spacing the facing skins and transfers shear between them to make the composite panel work as a homogeneous structure
The analysis show how close the experimental results to the FEM
Summary
New materials typically bring new challenges to designer who utilizes these new materials. In the past decades various sandwich panels have been implemented in aerospace, marine, architectural and transportation industry. Light-weight, excellent corrosion characteristics and rapid installation capabilities created tremendous opportunities for these sandwich panels in industry. The face skins act like the flanges of an I-beam whereas the core works like web by spacing the facing skins and transfers shear between them to make the composite panel work as a homogeneous structure. The faces are typically bonded to the core to achieve the composite action and to transfer the forces between the components
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