Develop Advanced Cumulative Damage Models for Multi-Strike RC Bunkers

ABSTRACT:This proposal describes an approach to meeting AFRLs goals of upgrading MEVA to accurately assess the cumulative damage effects of Multi-Hit targeting scenarios. The approach makes use of WAIs coupled NLFlex/VCFD software for the HFPB computational component of this effort and leverages WAIs wide ranging experience in using HFPB modeling to simulate the response of the full range of structural construction types to threats of interest. It also relies on WAIs experience in developing innovative FRM tools for evaluating blast effects of concrete components including breach and secondary debris and familiarity with the MEVA software.BENEFIT:The primary benefit of this R&D will be the extension of MEVA to address multi-strike attacks on high strength RC bunkers. The primary market for the cumulative damage blast response modules developed under this project would be DOD organizations in the U.S. For example, DTRA develops and maintains the IMEA software for offensive targeting needs and VAPO for terrorist threats to civil construction. The new modules have potential application to both VAPO and IMEA. A previous example of this type of commercialization synergy was the Multi-hit Progressive Collapse (MPC) FRM developed by WAI under AFRL funding for inclusion within the MEVA software. At a later date, WAI received funding from DTRA to extend the steel connection modeling capabilities of MPC. Once this extension was completed, DTRA funded WAI to incorporate MPC within DTRAs VAPO software. And more recently, the Department of Homeland Security funded WAI to incorporate MPC capability within its UrbanBlast software. UrbanBlast is a FRM tool developed under funding from DHS for quantifying blast pressure fields and structural damage (including collapse) resulting from vehicle borne threats in urban settings.