Journal article
Multi-scale shock-to-detonation simulation of pressed energetic material: A meso-informed ignition and growth model
Journal of applied physics, Vol.124(8), p.85110
08/28/2018
DOI: 10.1063/1.5046185
Abstract
This work presents a multiscale modeling framework for predictive simulations of shock-to-detonation transition (SDT) in pressed energetic (HMX) materials. The macro-scale computations of SDT are performed using an ignition and growth (IG) model. However, unlike in the traditional semi-empirical ignition-and-growth model, which relies on empirical fits, in this work meso-scale void collapse simulations are used to supply the ignition and growth rates. This results in a macro-scale model which is sensitive to the meso-structure of the energetic material. Energy localization at the meso-scale due to hotspot ignition and growth is reflected in the shock response of the energetic material via surrogate models for ignition and growth rates. Ensembles of meso-scale reactive void collapse simulations are used to train the surrogate model using a Bayesian Kriging approach. This meso-informed Ignition and Growth (MES-IG) model is applied to perform SDT simulations of pressed HMXs with different porosity and void diameters. The computations are successfully validated against experimental pop-plots. Additionally, the critical energy for SDT is computed and the experimentally observed
P
s
2
τ
s
=
constant relations are recovered using the MES-IG model. While the multiscale framework in this paper is applied in the context of an ignition-and-growth model, the overall surrogate model-based multiscale approach can be adapted to any macro-scale model for predicting SDT in heterogeneous energetic materials.
Details
- Title: Subtitle
- Multi-scale shock-to-detonation simulation of pressed energetic material: A meso-informed ignition and growth model
- Creators
- O Sen - Mechanical and Industrial Engineering, The University of IowaN. K Rai - Mechanical and Industrial Engineering, The University of IowaA. S Diggs - Air Force Research Laboratory, Munitions Directorate (AFRL/RW), Eglin AFBD. B Hardin - Air Force Research Laboratory, Munitions Directorate (AFRL/RW), Eglin AFBH. S Udaykumar - Mechanical and Industrial Engineering, The University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of applied physics, Vol.124(8), p.85110
- DOI
- 10.1063/1.5046185
- ISSN
- 0021-8979
- eISSN
- 1089-7550
- Number of pages
- 21
- Grant note
- FA9550-15-1-0332; SA0000506 / Air Force Office of Scientific Research (http://dx.doi.org/10.13039/100000181)
- Language
- English
- Date published
- 08/28/2018
- Academic Unit
- IIHR--Hydroscience and Engineering; Injury Prevention Research Center; Mechanical Engineering
- Record Identifier
- 9984121869202771
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