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Blast Performance of Sandwich Composites with In-Plane Compressive Loading

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Abstract

An experimental investigation was conducted to evaluate the dynamic performance of E-glass Vinyl Ester composite face sheet / foam core sandwich panels when subjected to pre-compression and subsequent blast loading. The sandwich panels were subjected to 0 kN, 15 kN and 25 kN of in plane compression respectively, prior to transverse blast wave loading with peak incident pressure of 1 MPa and velocity of 3 Mach. The blast loading was generated using a shock tube facility. During the experiments, a high-speed photographic system utilizing three digital cameras was used to acquire the real-time 3-D deformation of the sandwich panels. The 3D Digital Image Correlation (DIC) technique was used to quantify the back face out-of-plane deflection and in-plane strain. The results showed that in-plane compressive loading facilitated buckling and failure in the front face sheet. This mechanism greatly reduced the blast resistance of sandwich composites.

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Acknowledgement

The authors acknowledge the financial support provided by Dr. Yapa D. S. Rajapakse, under Office of Naval Research Grant No. N00014-04-1-0268and the support provided by the Department of Homeland Security under Cooperative Agreement No. 2008-ST-061-ED0002. The authors also thank Dr. Stephen Nolet and TPI Composites for providing their facility to fabricate the sandwich materials. Thanks to Gurit SP Technology and Speciality Products Incorporated for providing the core material used in this study.

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Authors and Affiliations

  1. Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA

    E. Wang (SEM member)

  2. Department of Mechanical, Industrial and Systems Engineering, University of Rhode Island, Kingston, RI, 02881, USA

    A. Shukla (SEM Fellow)

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  1. E. Wang
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  2. A. Shukla
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Correspondence to A. Shukla.

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Wang, E., Shukla, A. Blast Performance of Sandwich Composites with In-Plane Compressive Loading. Exp Mech 52, 49–58 (2012). https://doi.org/10.1007/s11340-011-9500-5

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  • DOI: https://doi.org/10.1007/s11340-011-9500-5

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