Pore collapse and hot spots in hmx
WebJun 27, 2024 · Due to their upstream location in the HMX grain, the surface pores collapse sooner than interior pores; thus, the extent of reaction will generally favor these … WebAug 4, 2004 · Pore Collapse and Hot Spots in HMX. R. Menikoff. Published 4 August 2004. Engineering. Hot spots are critical for initation of explosives because reaction rates are …
Pore collapse and hot spots in hmx
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Web311j Pore Collapse and Hot Spots in HMX. Approved for public release; distribution i5 unlimited. May 1, 2003. c . Title: MENIKOFF Author(s): RALPH. Submitted to: APS Topical … WebJul 20, 2004 · A multiscale modeling strategy is used to quantify factors governing the temperature rise in hot spots formed by pore collapse from supported and unsupported …
WebMay 5, 2024 · It has been widely accepted that the pore collapse is a dominant mechanism of “hot-spot” ignition in pressed solid explosives [[22], [23], [24]], which, in general, includes the viscoplastic deformation, the hydrodynamic micro-jetting, the compression of gas in cavities and the shear bandings, and the explosive maybe enter the process of transition … WebJan 5, 2024 · The collapse of pores plays an essential role in the shock initiation of high energy ... simulations to study the formation of hot-spots during the collapse of an 80 nm size void in a ... and J. E. Reaugh, “ Modeling the effects of shock pressure and pore morphology on hot spot mechanisms in HMX,” Propellants Explos.
WebJun 27, 2024 · We investigate the effects of shock pressure and pore morphology on the formation and growth of hot spots in HMX (octahydro‐1,3,5,7‐tetranitro‐1,3,5,7‐tetrazocine). WebThis paper offers a new method for calculating the reaction rate based on the pore collapse “hot-spot” ignition mechanism in multi-component polymer bonded explosives (PBXs), and proposes a mesoscopic reaction rate model that allows us to predict the shock initiation and detonation behaviors of multi-component PBXs with any explosive component proportion …
WebJan 13, 2024 · The Lindemann Law model is used for shock melting in HMX. In contrast to previous pore collapse studies at lower shock pressures (≤10 GPa) in HMX and shorter …
WebJan 17, 2024 · A multi-step thermal-decomposition model is employed to simulate the chemical reaction of the HMX. Firstly, numerical simulations were implemented for a few plane shock experiments and it is demonstrated that the material model of HMX have reasonable accuracy. Then, the pore collapse in a HMX crystal under a shock at 500 m/s … gps navigation for trucksWebMay 7, 2024 · @article{osti_1643769, title = {Hotspot formation due to shock-induced pore collapse in 1,3,5,7-tetranitro-1,3,5,7-tetrazoctane (HMX): Role of pore shape and shock … gps navigation message has how many subframesWebJun 27, 2024 · Due to their upstream location in the HMX grain, the surface pores collapse sooner than interior pores; thus, the extent of reaction will generally favor these morphologies because they have more time to grow. In general, multiple smaller hot spots tend to react faster than a single larger hot spot because they accelerate one another's … gps navigation free downloadWebAug 2, 2024 · This work presents our attempt to examine a single hot spot mode (void collapse) in single-crystal octahydro-l,3,5,7-tetranitro-l,3,5,7-tetrazocine (HMX) embedded in Sylgard. The hot spot heating mechanisms involved with pore collapse include adiabatic heating, jetting, and viscoplastic dissipation. Quantifying the dynamics of a pore collapse ... chili pepper food 123456WebMar 1, 1994 · A spherical pore collapses into an ellipsoid shape giving rise to high temperature regions of hot spots. For micro-pores of diameters below a few hundred … gps navigation online freeWebMay 7, 2014 · The collapse of microscopic pores contained within a crystal is one such process that localizes energy and generates hot spots. Given the difficulty of resolving the details of pore collapse in shock compression experiments, it is useful to study the problem using direct numerical simulation. chili pepper food bogra bangWebAn inea material (with the constibtive properties of HMX) is used to better focus on the mechanics of pore collapse. ' h o important findings resulted from this study. Eust, too … gps navigation housing for hyundai sonata i45