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Blast Mitigation Strategies in Marine Composite and Sandwich Structures pp 97–117Cite as

Concentrated Load Impulse Response of a Sandwich Beam/Wide Plate: Dynamic Elasticity and Extended High Order Sandwich Panel Theory Solutions

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Abstract

The linear dynamic response of a simply supported orthotropic sandwich beam/wide panel subjected to a concentrated blast load is studied. The point-wise load is expressed as a Fourier sinusoidal series, i.e., a summation of distributed loads over the beam span, for which closed-form elasticity solutions can be derived. For the elasticity, the Laplace transform is used on the dynamic elasticity equations, and as a result, a closed-form solution is obtained in the Laplace domain. Then the numerical inverse Laplace transform and, in particular, the Euler method, is applied to obtain the time domain solution. The simply supported solution of the dynamic Extended High order Sandwich Panel Theory (EHSAPT) is also obtained for the terms of the load Fourier series and on the basis of the superposition principle, and the results are compared with the dynamic elasticity solution. Results are presented on both the deformation and stress fields at the transient phase of blast. The dynamic EHSAPT shows very good agreement with the dynamic elasticity and provides useful insight on the sandwich core failure mechanisms.

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Acknowledgements

The financial support of the Office of Naval Research, Grant N00014-16-1-2831, and the interest and encouragement of the Grant Monitor, Dr. Y.D.S. Rajapakse, are both gratefully acknowledged.

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Authors and Affiliations

  1. School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0150, USA

    Nunthadech Rodcheuy & George A. Kardomateas

Authors
  1. Nunthadech Rodcheuy
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  2. George A. Kardomateas
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Correspondence to George A. Kardomateas .

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Editors and Affiliations

  1. Department of Aerospace Engineering, Indian Institute of Science, Bangalore, Karnataka, India

    Srinivasan Gopalakrishnan

  2. Programme Manager, Solid Mechanics Program, Office of Naval Research, Arlington, Virginia, USA

    Yapa Rajapakse

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Rodcheuy, N., Kardomateas, G.A. (2018). Concentrated Load Impulse Response of a Sandwich Beam/Wide Plate: Dynamic Elasticity and Extended High Order Sandwich Panel Theory Solutions. In: Gopalakrishnan, S., Rajapakse, Y. (eds) Blast Mitigation Strategies in Marine Composite and Sandwich Structures. Springer Transactions in Civil and Environmental Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-10-7170-6_5

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  • DOI: https://doi.org/10.1007/978-981-10-7170-6_5

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-10-7169-0

  • Online ISBN: 978-981-10-7170-6

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