Contract W911NF-09-1-0111 (University of Colorado-Boulder)
Abstract
Using solely grain-scale physics-based simulation methods, it is too computationally intensive to account for both (I) global initial boundary value problem (IBVP) conditions, and (II) grain-scale material behavior, to understand fundamentally the mechanics of dynamic failure in bound particulate materials. The objective of the proposed research is to achieve this understanding by accounting simultaneously for grain-scale physics and macro-scale continuum IBVP conditions. To achieve the proposed objective, a concurrent computational multi-scale modeling approach will be developed that involves the following 3 features: (1) coupling regions of micromorphic continuum finite element to an `open window' on the particulate micro-structure where localized deformation nucleates and an interface with a deformable solid body could exist; (2) converting to discrete element fragmentation modeling in micro-structural regions; and (3) adapting numerically grain-scale resolution over the material domain. The desired result is to enable a more complete understanding of the role of grain-scale physics on the thermo-mechanical properties and performance of heterogeneous bound particulate materials of interest to the Army. The contribution will be demonstrated by working with Army researchers in the Impact Physics Branch during onsite visits and through an open-source research code Tahoe where the concurrent multi-scale model will be implemented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 2012
- Accession Number
- ADA584725
Entities
People
- Richard A Regueiro
Organizations
- University of Colorado Boulder