The blast resistance of sandwich composites with stepwise graded cores

By E. Wang, N. Gardner, A. Shukla. 2009

256 citations recorded by the source corpus.

Shock tube experiments were performed to study the dynamic response of sandwich panels with E-Glass Vinyl Ester (EVE) composite face sheets and stepwise graded styrene foam cores. Two types of core configurations, with identical areal density, were subjected to the shock wave loading. The core layers were arranged according to the density of the respective foam; configuration 1 consisted of low/middle/high density foams and configuration 2 consisted of middle/low/high density foams. The method to calculate the incident and reflected energies of the shock wave, as well as the deformation energy of the specimen, were proposed based on the shock wave pressure profiles and the high speed deflection images that were obtained. The experimental results showed that configuration 1 outperformed configuration 2 in regards to their blast resistance. Significant core material compression was observed in configuration 1, while in configuration 2 the core layers disintegrated and the front skin (blast side) fractured into two pieces along the midsection. The estimated energies were then calculated for both configurations. The total energy difference between the incident and reflected energies was almost identical, even though the deformation energy for configuration 2 was larger.

Subfields: Civil and Structural Engineering, Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/43f6f8903091e6b711d698e32aab57b4385907c7

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In Civil and Structural Engineering

In Mechanical Engineering

In Mechanics of Materials

Citations in the corpus

Blast Mitigation in a Sandwich Composite Using Graded Core and Polyurea Interlayer (2012, background): “In their previous work, the authors experimentally investigated the blast resistance of sandwich composites with stepwise graded foam cores [6].”
Analysis of Sandwich Beams With a Compliant Core and With In-Plane Rigidity—Extended High-Order Sandwich Panel Theory Versus Elasticity (2012, background): “However, recent studies [4] have shown significant core transverse deformation=strain in a sandwich structure subject to impulsive loading or localized loads or in the vicinity of abrupt changes in the layout of a sandwich panel.”
Experimental and numerical study of foam filled corrugated core steel sandwich structures subjected to blast loading (2014, background): “Based on these ideas, extensive research on blast mitigating layered sandwich structures has been performed in recent years, using foam cores with different wave impedances to minimize shock effect [27–29].”
The impact response of graded foam sandwich structures (2013, background): “Other studies have investigated functionally-graded foam sandwich beams subjected to various forms of dynamic loading [5–8].”
Dynamic crushing and energy absorption of regular, irregular and functionally graded cellular structures (2011, result): “Our study also complements recent studies on performance of sandwich panels with graded cores (Dharmasena et al., 2009; Wang et al., 2009) and could help develop a new class of energy absorbent cellular materials and impact resistant structures.”