Title: Experiments and Mesoscale Modeling of Ballistic Impact on Plain Weave Glass/Epoxy Composite

Authors: Christopher S. Meyer, Daniel J. O’Brien, Bazle Z. (Gama) Haque, John W. Gillespie Jr

DOI: 10.33599/nasampe/s.22.0759

Abstract: It has been shown that the ballistic impact response of multi-layered fabric composites can be decoupled since the first thin layers behave as if they are not backed by additional layers. This observation motivated single-layer impact experiments with 17 grain (1.1 gram) 0.22 caliber fragment simulating projectiles. Experiments were conducted on a single-layer, plain weave S-2 glass fabric and epoxy composite. To avoid stress wave and boundary condition effects, targets were 0.6 m by 0.6 m. The experiments focused on determining the ballistic limit velocity, which was found to be 154 m/s. In this paper, ballistic impact experiments are reported and simulated with a continuum model and a mesoscale model. Continuum finite element models are typically used to simulate impact experiments. The continuum model includes rate-dependent, progressive damage effective plain weave properties, but lacks important damage mechanisms that occur at the mesoscale. The mesoscale model includes discrete plain weave architecture, rate-dependent material models and parameters, and rate-dependent cohesive interfaces for delamination between tows. The continuum model predicts a ballistic limit velocity of 144 m/s, 6% error. The mesoscale model predicts a ballistic limit velocity of 153 m/s, 1% error.

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Conference: SAMPE 2022

Publication Date: 2022/05/23

SKU: TP22-0000000759

Pages: 10

Price: $20.00