Underwater Impulsive Loading-Induced Dynamic Failures of Monolithic Composite Panel

Abstract:

Designing light-weight high-performance materials which can sustain high impulsive loadings is of great interest to marine applications. In this study, a finite element fluid-structure interaction model is developed to understand the deformation and failure mechanisms of both monolithic and sandwich composite panels. Fiber (E-glass fiber) and matrix (vinylester resin) damage and degradation in individual unidirectional composite laminas are modeled with Hashin’s model. The delamination between laminas is modeled by developing a strain rate sensitive cohesive law. The deformation of the core (H250 PVC foam) in sandwich panels is modelled as a crushable foam plasticity model with volumetric hardening and strain rate sensitivity as well. The deformation history, fiber/matrix damage patterns in laminas, and inter-lamina delamination in both monolithic and sandwich composite panels are identified and compared with the experimental observations. The model suggests that the foam plays an important role in improving the performance of the sandwich panels by suppressing the transmitted impulsive acting on the back-sheets.

• Periodical: Applied Mechanics and Materials (Volume 553)
• Pages: 539-544
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.553.539
• Online since: May 2014
• Authors: Phuong Tran*, Tuan D. Ngo, Priyan Mendis
• Keywords: Composite Damage, Composite Laminate, Fluid Structure Interaction (FSI), Impulsive Loading

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