摘要:

AbstractRelatively stable equimolar adducts of 1,3,5‐trinitro‐1,3,5‐triazacyclohexane were prepared with 2,6‐lutidine‐N‐oxide, 4‐hydroxy‐1‐butanesulfonic acid δ‐sultone (1,4‐butane sultone), and 2,2,6,6‐tetramethyl‐4‐piperidone‐1‐oxyl. Only the last adduct is selective for RDX; the others also form adducts with 1,3,5,7‐tetranitro‐1,3,5,7‐tetrazacyclooctane. A very labile RDX adduct is formed with tetrahydrothiophene‐1‐oxide. Some p

ISSN:0721-3115    

DOI:10.1002/prep.19810060102

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractThe effect of the initial particle size on the deflagration to detonation transition (DDT) of pressed, confined explosives has been studied. The explosives examined were ground tetryl, RDX, picric acid, waxed RDX, and waxed HMX. The ground tetryl was studied over the range of 61%−90% theoretical maximum density (TMD); most of the rest of the comparisons were made at 70% TMD. It was found that the initial particle size (or particle size distribution)δaffected the predetonation column length ℓ, the relative time to detonation, and even the apparent mechanism of DDT. Available data in the literature in conjunction with the present results indicate that the curves ℓ versus %TMD at constantδ, and ℓ versusδat constant %TMD both exhibit

ISSN:0721-3115    

DOI:10.1002/prep.19810060103

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractIt was shown in a previous paper(1)that the break‐up time of homogenious ductile metals which elongate due to explosions, is equal to the sample's smallest initial dimension (thickness) divided by the velocity Vplwhich characterizes the metal. It is attempted to explain this rule by suggesting a break‐up mechanism where holes caused by a pile‐up of vacancies are formed at the metal surface and gradually increase until breaking it. This model also predicts the existence of a strain rate threshold below which other mechanisms dominate the break‐up process. Its validity is supported by experimental evidence which is also pr

ISSN:0721-3115    

DOI:10.1002/prep.19810060104

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractAn analogy can be drawn between the sonic barrier in transonic flight, the thermal barrier in supersonic or hypersonic flight, and the limiting of the detonation process in high explosives.

ISSN:0721-3115    

DOI:10.1002/prep.19810060105

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

摘要:

AbstractAn expression is developed for the friction coefficient of a material in terms of the parameters that control the friction shear. This expression in conjunction with the frictional heating equation describes the hot spot temperature produced in a friction event. Hot spot temperature increases with an increase in the particle size and shear strength of the explosive material, with an increase in the (shock) loading pressure and friction velocity, and with a decrease in material thermal conductivity. The equations are discussed in terms of their implications regarding the factors that control the sensitivity of an explosive or propellant to frictional heating under various conditions, and the results of experimental studies given in the literature.

ISSN:0721-3115    

DOI:10.1002/prep.19810060106

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY

ISSN:0721-3115    

DOI:10.1002/prep.19810060101

出版商:WILEY‐VCH Verlag GmbH    

年代:1981

数据来源: WILEY