Multiscale modeling of shock-induced detonation initiation and failure
Abstract
The shock-to-detonation transition in an energetic material involves run-to-detonation lengths of millimeters and involves the formation and deflagration of hotspots within the reaction zone that form due to the coupling of the leading shock with the microstructure and defects of the material. Detonation initiation and propagation involve processes and materials features ranging in scale from Angstroms (bonds and molecules) and few nanometers (pores and interfaces) to hundreds of microns (grain size). A predictive understanding of the response of HE composites to strong insults requires identifying, characterizing, and modeling coupled processes at the microstructural level (interfacial friction, cracks, void collapse), crystal level (dislocations and shear bands), and the molecular-electronic level (inter- and intra-molecular energy transfer and chemical reactions). Importantly, all these processes occur at extreme conditions of temperature and pressure, under ultra-fast strain rates and tri-axial loading conditions.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 14, 2024
- Source ID
- FA95502310674
Entities
People
- Alejandro Strachan
Organizations
- Air Force Office of Scientific Research
- Purdue University
- United States Air Force