A model for hot spot formation in shocked energetic materials

Akiki, Michel; Menon, Suresh

doi:10.1016/j.combustflame.2014.11.037

Cited by 52 publications

(9 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In essence, most pure explosives possess high sensitivity. Coating insensitive components on the explosive particles suppresses the formation of hot-spots and reduces the risk of accidental explosion [36][37][38]. Application of the core-shell strategy can achieve a complete surface coverage with minimal use of coating materials to ensure energy performance and can be extended to different types of EMs with simple and mild methods [39,40].…”

Section: Introductionmentioning

confidence: 99%

The Art of Framework Construction: Core–Shell Structured Micro-Energetic Materials

Duan¹,

Li²,

Hu³

et al. 2021

Molecules

View full text Add to dashboard Cite

Weak interfacial interactions remain a bottleneck for composite materials due to their weakened performance and restricted applications. The development of core–shell engineering shed light on the preparation of compact and intact composites with improved interfacial interactions. This review addresses how core–shell engineering has been applied to energetic materials, with emphasis upon how micro-energetic materials, the most widely used particles in the military field, can be generated in a rational way. The preparation methods of core–shell structured explosives (CSEs) developed in the past few decades are summarized herein. Case studies on polymer-, explosive- and novel materials-based CSEs are presented in terms of their compositions and physical properties (e.g., thermal stability, mechanical properties and sensitivity). The mechanisms behind the dramatic and divergent properties of CSEs are also clarified. A glimpse of the future in this area is given to show the potential for CSEs and some suggestions regarding the future research directions are proposed.

show abstract

Section: Introductionmentioning

confidence: 99%

The Art of Framework Construction: Core–Shell Structured Micro-Energetic Materials

Duan¹,

Li²,

Hu³

et al. 2021

Molecules

View full text Add to dashboard Cite

show abstract

“…In addition, mesoscopic reaction rate models based on the hotspots have also been investigated [30–46]. For example, Kim [30, 31] used a hollow sphere model to describe the deformation behavior around a pore in the explosive and obtained a reaction rate for the hotspot ignition.…”

Section: Introductionmentioning

confidence: 99%

“…Building on this work, Doolan [38] improved its computational efficiency to allow for two‐dimensional simulations by reducing the cost of computing induction times. Akiki and Menon [40] present a numerical model for the prediction of SDT in energetic materials using a hotspot model to introduce the effects of heterogeneities in a continuum formulation. The model bridges the gap between the meso‐scale and the homogeneous macro‐scale.…”

Section: Introductionmentioning

confidence: 99%

Ubiquitiform Hotspot Ignition Model of PBX for Shock Initiation

Chun

Duan

et al. 2021

Propellants Explo Pyrotec

View full text Add to dashboard Cite

In this study, a ubiquitiform hotspot ignition model with cross‐scale characteristics is proposed to describe the ignition stage of PBX, which can account for heterogeneous effects. Firstly, a ubiquitiform model of hotspot intensity is obtained. The model can describe the hotspot information after PBX is impacted. In which, a hotspot distribution model based on the nested ubiquitiform model of explosives is used to characterize geometric properties of hotspot, including the size and location of hotspot; and the Weibull statistical distribution function is used to describe the distribution of hotspot intensity. Then, combining the ubiquitiform model of hotspot intensity with Arrhenius model, the ubiquitiform hotspot ignition model is developed to characterize the ignition stage of PBX. Finally, it is found that the equivalent reaction rate constants calculated by our ignition model are in good agreement with the previous experimental data.

show abstract

“…A single variable is introduced to represent the reaction quantitatively. The second group [5][6][7][8] treats the solid reactants and gas products separately. They consist of the balance laws of mass, momentum, energy for each phase, and the equations that allow solid phase compression.…”

Section: Introductionmentioning

confidence: 99%

A Systematic Method to Determine and Test the Ignition and Growth Reactive Flow Model Parameters of a Newly Designed Polymer‐Bonded Explosive

Xiao

Sun

Zhao

et al. 2018

Propellants Explo Pyrotec

View full text Add to dashboard Cite

In this paper, a systematic method to determine and test the ignition and growth reactive flow model parameters of a new energetic material PBX 1314 (60 weight % RDX, 16 weight % aluminum and 24 weight % HTPB) is presented. Cylinder test and shock initiation experiments are performed to study the shock initiation property of the explosive. Ignition and growth parameters are determined based on the experimental data. Test of the obtained parameters is performed by the comparison of the reaction fraction in the impact initiation and energy release experiments and the corresponding numerical simulations. The simulation results reveal that the proceeding of reaction and energy release are unsteady and inhomogeneous. Pressure decline quenches the reaction in the impact layer of the specimen although the impact pressure is more than 7 GPa. Wave reflection and superposition strengthen the pressure in the top of the specimen and triggers detonation.

show abstract

A model for hot spot formation in shocked energetic materials

Cited by 52 publications

References 41 publications

The Art of Framework Construction: Core–Shell Structured Micro-Energetic Materials

The Art of Framework Construction: Core–Shell Structured Micro-Energetic Materials

Ubiquitiform Hotspot Ignition Model of PBX for Shock Initiation

A Systematic Method to Determine and Test the Ignition and Growth Reactive Flow Model Parameters of a Newly Designed Polymer‐Bonded Explosive

Contact Info

Product

Resources

About