Computational Investigation of Crack-Induced Hot-Spot Generation in Energetic Composites
Abstract
The sensitivity of polymer-bonded explosives (PBXs) can be tuned through adjusting binder material and its volume fraction, crystal composition and morphology. To obtain a better understanding of the correlation between grain-level failure and hot-spot generation in this kind of energetic composites as they undergo mechanical and thermal processes subsequent to impact, a recently developed interfacial cohesive zone model (ICZM) was used to study the dynamic response of polymer-bonded explosives. The ICZM can capture the contributions of deformation and fracture of the binder phase as well as interfacial debonding and subsequent friction on hot-spot generation. In this study, a two-dimensional (2D) finite element (FE) computational model of energetic composite was developed. The proposed computational model has been applied to simulate hot-spot generation in polymer-bonded explosives with different grain volume fraction under dynamic loading. Our simulation showed that the increase of binder phase material volume fraction will decrease the local heat generation, resulting in a lower temperature in the specimen.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 10, 2021
- Source ID
- 10.3390/jcs5080210
Entities
People
- Justin W. Wilkerson
- Liqiang Lin
- Xiaowei Zeng
- Xingzi Yang
Organizations
- Air Force Office of Scientific Research