Light-Weight, Damage-Tolerant, Intelligent, Multiscale Truss Lattices for Ballistic and Blast Protection
Abstract
Light-Weight, Damage-Tolerant, Intelligent, Multiscale Truss Lattices for Ballistic and Blast Protection The ultimate goal of this research is a fundamental understanding of the mechanical response of multiscale, multimaterial truss lattices to blast and ballistic impact. This will be achieved through new predictive, validated, physics-based computational tools which enable us to describe, understand, predict, and ultimately to optimize the nonlinear, inelastic, dynamic performance of next-generation light-weight cellular solids. Key to the proposed research are concepts borrowed from coarsegrained atomistic (speci cally, from the quasicontinuum method). Full resolution of individual truss members will be restricted adaptively to regions of interest (e.g., in the immediate vicinity of an impacting projectile) while the e ective performance of the remaining lattice is e ciently represented by a coarse-grained truss model. This requires the identi cation of e ective constitutive relations that describe individual truss members and truss junctions by a considerably reduced number of degrees of freedom. Thereby, time-dependent material behavior and hybrid material combinations are accounted for by detailed nite element calculations. Validation is achieved by in-situ micromechanical experiments. The new theory is implemented in a high-performance computational toolbox for scale-bridging simulations of blast and impact to understand the in uence of base materials, architecture, and hierarchy.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 23, 2016
- Source ID
- N000141612431
Entities
People
- Dennis Kochmann
Organizations
- California Institute of Technology
- Office of Naval Research
- United States Navy