Blast Performance of Sandwich Composites with In-Plane Compressive Loading
Date of Original Version
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. © 2011 Society for Experimental Mechanics.
Wang, E., and A. Shukla. "Blast Performance of Sandwich Composites with In-Plane Compressive Loading." Experimental Mechanics 52, 1 (2012): 49-58. doi:10.1007/s11340-011-9500-5.