Engineering Transactions, 60, 3, pp. 187–203, 2012

2D FE Micromechanics Modelling of Honeycomb Core Sandwich Panels

Charles BETTS
Head of Mechanics of Materials Division Department of Mechanical Engineering, Imperial College

Jianguo LIN
Head of Mechanics of Materials Division Department of Mechanical Engineering, Imperial College

Daniel BALINT
Head of Mechanics of Materials Division Department of Mechanical Engineering, Imperial College

Anthony ATKINS
Head of Mechanics of Materials Division Department of Mechanical Engineering, Imperial College

A repeating unit cell 2D finite element modelling procedure has been established to model
the mechanical behaviour of honeycomb core sandwich panels (e.g. Young’s modulus, energy
absorbed, etc.). Periodic boundary conditions have been implemented within the model to
simulate an infinitely long sandwich panel. An analytical solution using Timoshenko beam
theory has been developed to predict the Young’s modulus of the honeycomb core, and this
has been compared with the FE model results; it is found that there is good agreement between
the two values. The FE model can shed light on the mechanics of more complex 3D metal foams.
Keywords: micromechanical modelling, sandwich panel, metal foam, honeycomb, finite elements, periodic boundary conditions
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