Wasatch Molecular: Multiscale Computationally-Guided Design of Ballistic and Blast Resistant Layered Materials Navy SBIR FY2012.2 Sol No.: Navy SBIR FY2012.2 Topic No.: N122-143 Topic Title: Wasatch Molecular: Multiscale Computationally-Guided Design of Ballistic and Blast Resistant Layered Materials Proposal No.: N122-143-0353 Firm: Wasatch Molecular Inc. 825 North, 300 West Suite W003 Salt Lake City, Utah 84103 Contact: Grant Smith Phone: (801) 746-9258 Web Site: www.wasatchmolecular.com Abstract: A multiscale modeling approach is proposed for the development and implementation of physics-based EOS and constitutive models within a multimaterials continuum modeling framework. Accurate EOS and rate-dependent constitutive (flow, yield stress, damage) models for plate glass, PMMA and segmented elastomers will be developed based upon equilibrium and non-equilibrium molecular dynamics simulations and will be validated through direct comparison of predicted impact behavior with experimental measurements. MD simulations will also facilitate development of improved interfacial models needed for prediction of wave propagation in multilayered materials. The material point method (MPM) will implement these models as well as improved 2- and 3-D crack propagation, fracture, failure and materials interface models, allowing for accurate numerical assessment and optimization of layered structures of various materials and geometries to resist ballistic and blast impact. Benefits: The proposed, validated multiscale modeling tools will greatly facilitate evaluation of the efficacy of existing ballistic/blast shielding designs and will allow for rapid design/optimization of new shielding configurations (materials, geometry, layer thickness and arrangement) for wide variety of scenarios. Potential commercial applications include use of the developed tools to design shielding for the DOD and other governmental agencies, selling of the software to DOD supplies, and the development of patentable shielding designs by our firm. Return