Low velocity impact response of sandwich beams with composite face-sheets and foam or honeycomb core: analytical modeling and finite element simulation

Document Type : Research Article

Authors

Razi university

Abstract

In this paper, an analytical solution for the static indentation and low velocity impact response of composite sandwich beams with an orthotropic symmetric composite face-sheets and foam or honeycomb core is presented. The indentation force during impact loading consists of two regimes, one for small indentations of top face-sheet due to bending moments and the other for larger deformation due to membrane forces. Also, the crushable core is considered as a rigid-plastic foundation and the elastic aspect is neglected. To obtain a more accurate approximation of the static indentation of the beam, both the local and global deformation of sandwich beam are considered. The minimum potential energy method is applied for extraction of governing equations. Furthermore, by developing a 3D finite-element model (FEM) through ABAQUS code, the low velocity impact on composite sandwich beams with foam core is simulated. The contact force history, maximum contact force, and upper face-sheet displacement results computed by analytical model are compared with experimental and ABAQUS simulations. A good agreement between the analytical model, FE simulation and experimental results, is observed.

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