This paper investigates the nonlinear dynamic response of a shallow sandwich shell subject to blast loading with consideration of core compressibility. The shallow shell consists of two laminated composite or metallic face sheets and an orthotropic compressible core. Experimental results and finite element simulations in literature have shown that the core exhibits considerable compressibility when a sandwich panel is subjected to impulse loading. To address this issue properly in the analysis, a new nonlinear compressible core model is proposed in the current work. The system of governing equations is derived by means of Hamilton’s principle in combination with the Reissner–Hellinger’s variational principle. The analytical solution for the simply supported shallow shell is formulated using an extended Galerkin procedure combined with the Laplace transform. Numerical results are presented. These results demonstrate that this advanced sandwich model can capture the transient responses such as the stress shock wave effect and the differences in the transient behaviors of the face sheets and the core when a sandwich shadow shell is subjected to a blast loading. However, in the steady state dynamic stage, all the displacements of the face sheets and the core tend to be identical. This model can be further used to study the energy absorption ability of the core and the effects of different material and geometrical parameters on the behaviors of sandwich structures subject to blast loading.
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November 2008
Research Papers
Nonlinear Response of a Shallow Sandwich Shell With Compressible Core to Blast Loading
Renfu Li,
Renfu Li
Postdoctoral Fellow
Georgia Institute of Technology
, Atlanta, GA 30332-0150
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George A. Kardomateas,
George A. Kardomateas
Professor of Aerospace Engineering
Fellow ASME
Georgia Institute of Technology
, Atlanta, GA 30332-0150
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George J. Simitses
George J. Simitses
Professor Emeritus of Aerospace Engineering
Fellow ASME
Georgia Institute of Technology
, Atlanta, GA 30332-0150
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Renfu Li
Postdoctoral Fellow
Georgia Institute of Technology
, Atlanta, GA 30332-0150
George A. Kardomateas
Professor of Aerospace Engineering
Fellow ASME
Georgia Institute of Technology
, Atlanta, GA 30332-0150
George J. Simitses
Professor Emeritus of Aerospace Engineering
Fellow ASME
Georgia Institute of Technology
, Atlanta, GA 30332-0150J. Appl. Mech. Nov 2008, 75(6): 061023 (10 pages)
Published Online: August 22, 2008
Article history
Received:
September 21, 2007
Revised:
March 9, 2008
Published:
August 22, 2008
Citation
Li, R., Kardomateas, G. A., and Simitses, G. J. (August 22, 2008). "Nonlinear Response of a Shallow Sandwich Shell With Compressible Core to Blast Loading." ASME. J. Appl. Mech. November 2008; 75(6): 061023. https://doi.org/10.1115/1.2937154
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