High Energy Density Metallic Mechanical Alloys for New Explosives and Incendiary Devices with Controllable Explosion Parameters

The overall objective of the Phase I is to demonstrate and validate the concept of a Hierarchically-based, Solution Adaptive Mesh Refinement (HAMR) gasdynamics solver to predict unsteady blast wave propagation within a dense urban environment. This veryunique type of gasdynamics equations solver is based upon Godunovs' scheme, and is particularly well suited for rapid and highly-accurate predictions of the unsteady, strong shock dominated environment immediately after an explosive event in geometricallycomplex cityscapes. The difficulty of generating an accurate geometric model of the cityscapes is alleviated by using a unique image and voxel-based approach, which generates a computational mesh that is unique to the HAMR approach. By accuratelypredicting the transient pressure waves within the environment, post-event analysis of collateral damage, such as window breakage and stored weapons material release, may be simulated. Phase II will improve the fidelity and speed of the HAMR approach bysuch improvements as real gas effects and explosives equations of state, will account for structural deformation via a coupled CFD/CSD approach, and will implement distributed parallel processing upon inexpensive clusters of PC components.The Urban AreaBlast Wave Analysis package may be used to accurately predict the transient pressure loadings upon very complex building configurations and landscapes. This has direct application to weapons effect analysis and mission planning by providing the predictionof damage, both primary and collateral, to targets located in a dense urban environment. The developed tool may be used by Government personnel and related contractors, as well as by the Civil Defense, Emergency Management and Builders to determine theblast effects upon buildings located within urban environments.