Experimental investigation of shock and detonation propagation through two dimensional arrays of metal inclusions
Abstract
Experiments will be performed to develop an understanding of shock and detonation wave motion through complex geometries. The primary goals of the experiments are to develop quantitative measurements of shock wave characteristics, material properties, stress states, and shock to detonation transition throughout test articles made of surrogate and energetic material systems containing high explosives and metal inclusions. The experiments will measure physical behaviors at the mesoscale (~1 10 mm) and provide relevant computational validation data. The experiments will investigate complex two dimensional interactions between multiple interfaces in samples with varied obstacles to determine the resulting overall shock or detonation wave speed, broadening, and the ability to tune detonation output characteristics using structured inclusion geometries. The research will develop experimental techniques to measure material response and stress state in surrogate and energetic materials under shock loading. The diagnostics include ultra high speed refractive imaging, coherent gradient sensing, digital gradient sensing, and photon Doppler velocimetry (PDV). These techniques will allow direct quantification of the shock speed (Us) and particle velocity (Up) of the material, as well as local variations near inclusions, for direct comparison with computational models. The diagnostic suite will be applied to study shock propagation, reflection, and focusing in surrogate and energetic materials with metal inclusions in varied two dimensional geometries. The research will enhance US Department of Defense (DOD) capabilities through an improved understanding of mechanisms to control and tune detonation and explosive output characteristics using embedded materials, which applies to development of modern munitions with enhanced blast or multi mode, scalable effects. The research program will educate graduate students in detonation science to expand the future DOD workforce.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 14, 2022
- Source ID
- FA95501910379
Entities
People
- Michael Hargather
Organizations
- Air Force Office of Scientific Research
- New Mexico Institute of Mining and Technology
- United States Air Force