Pore collapse and hot spots in hmx
WebAug 4, 2004 · An inert material (with the constitutive properties of HMX) is used to better focus on the mechanics of pore collapse. Two important findings result from this study. First, insufficient resolution can significantly overpredict the hot‐spot mass. Second, up to … 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 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 …
Pore collapse and hot spots in hmx
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WebAn 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 … 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 …
Webhigh hot-spot temperatures, even for a strong shock at the high end of the measured Pop plot. Other dissipative mechanisms applicable to pore collapse are viscous heating and … WebJan 28, 2024 · A multiscale modeling strategy is used to quantify factors governing the temperature rise in hot spots formed by pore collapse from supported and unsupported shock waves in the high explosive HMX ...
WebNov 1, 2024 · Pore collapse thermal-mechanical-chemical responses and underlying physics of (011) and (110) oriented HMX were investigated under the shock velocities of 500 m/s, … WebApr 13, 2024 · The main reason for friction ignition of HMX-based cast PBX is the friction hot spot generated by microcracks formed after interface damage of the tablet mesoscopic …
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 …
WebMar 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 … cshp checklist 2021WebDec 4, 2014 · This paper is devoted to the building of a numerical pore collapse model with “hot-spots” formation for the impacted damage explosives. According to damage mechanical evolution of brittle material, the one-dimensional elastic-viscoplastic collapse model was improved to incorporate the impact damage during the dynamic collapse of … cshp checklist 2022eagle balti griffithstownWebHot spots are critical for initation of explosives because reaction rates are very temperature sensitive. For a plastic-bonded explosive, shock desensitization experiments imply that … eagle banana bread beer near meWebMar 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 microns, the strain rate in localized regions is in the range of 10 6 to 10 9 per second. Without conductivity, the temperature increases with decreasing diameter. eagle balm wikiWebJun 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 … cshp checklistWebNov 1, 2024 · Springer et al. (2024) analyzed the effect of shock pressure and pore morphology on hot spot mechanisms in HMX. Under these high shock strength conditions, ... Pore collapse and hot spots in HMX. AIP Conf. Proc. (2004), pp. 393-396. View in Scopus Google Scholar. Menikoff and Sewell, 2002. cshp bc