Performance of metallic honeycomb-core sandwich beams under shock loading

Stainless steel square honeycomb core sandwich and solid monolithic beams have been subjected to high-pressure, short-duration impulses using a shock simulation technique involving high-speed impact of Al foam projectiles. The experiments have been designed to achieve two objectives: (i) to demonstr...

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Bibliographic Details
Published in:International journal of solids and structures 2006-03, Vol.43 (6), p.1746-1763
Main Authors: Rathbun, H.J., Radford, D.D., Xue, Z., He, M.Y., Yang, J., Deshpande, V., Fleck, N.A., Hutchinson, J.W., Zok, F.W., Evans, A.G.
Format: Article
Language:English
Subjects:
Dynamic simulations
Sandwich beams
Shock loading
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Summary:Stainless steel square honeycomb core sandwich and solid monolithic beams have been subjected to high-pressure, short-duration impulses using a shock simulation technique involving high-speed impact of Al foam projectiles. The experiments have been designed to achieve two objectives: (i) to demonstrate the benefits of sandwich construction, and (ii) to assess the fidelity of dynamic finite element calculations in simulating the structural response. The results affirm that, when subjected to impulse levels representative of those associated with nearby explosions, the sandwich beams exhibit smaller displacements than the solid beams at equivalent weight. The benefit is especially large at lower impulses where the effective dynamic strength of the honeycomb core prevents crushing. The measurements and finite element simulations having greatest relevance to the shock resistance are found to correspond closely, particularly the displacements and the core crushing strains. One implication is that the dynamic finite element model has the requisite fidelity at impulse levels of interest.
ISSN:0020-7683
1879-2146
DOI:10.1016/j.ijsolstr.2005.06.079