Modeling of implosion mitigation strategies for submerged composite and sandwich structures
Abstract
Given (a) glass and carbon fiber-reinforced vinyl ester matrix plies and PVC foam core, (b) values of material parameters, (c) geometry constraints, (d) blast loads, and (e) uncertainties in values of material and geometric variables and boundary conditions, find optimal submerged cylindrical sandwich structures including the number of cores, PVC mass density, fiber material, fiber angle in each lamina, lamina thickness, and the confidence level of results to maximize the energy dissipated by considering the following strategies: functionally graded core; using polyurea layers and characterizing their optimal locations, thicknesses, and materials; surface modifications (e.g., using bio-inspired geometries of the surface facing impact pressure); and embedding viscoelastic material layers in the structureDuring the project, innovative mathematical models of the damage and failure in composites, and numerical techniques will be developed and verified for modeling and characterizing progressive damage till failure, and quantifying implosion mitigation in submerged composite structures. This effort will generate novel numerical tools and significant data for light-weighting implosion resistant and agile naval structures. These models will be validated against experimental data available in the literature.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 06, 2021
- Source ID
- N000142112283
Entities
People
- Romesh Batra
Organizations
- Office of Naval Research
- United States Navy
- Virginia Tech