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Applicability limits of the DAX test in plastic bonded explosives

Defence Technology（防务技术） 2024年第6期36卷 64-70页

作者： Martin Künzel Jindrich Kucera Jiri Pachman OZM Research Bliznovice 32Hrochuv Tynec 53862Czech Republic Institute of Energetic Materials Faculty of Chemical TechnologyUniversity of PardubiceStudentska 95Pardubice 53210Czech Republic

The Disc Acceleration e Xperiment(DAX)is one of the most recent experimental methods of performance characterization of new energetic materials.A cylindrical explosive charge accelerates a thin metallic disc and its velocity is measured continuously using photonic Doppler *** detonation velocity is measured *** DAX test can be used to obtain the Chapman-Jouguet(CJ)detonation pressure and to describe detonation products expansion using reduced amount of explosive.A series of DAX tests was performed at various charge diameters and disc thicknesses with Semtex 1 A plastic bonded explosive and sensitized *** DAX-like evaluation was also applied to previously measured data of Semtex 1A and A-IX-1 *** optimum disc thickness is determined by the disc to explosive mass ratio of *** repeatability of the Semtex 1 A detonation pressure results is about four times lower compared to the pressed and liquid explosives.

关键词： Flyer plate detonation pressure Photonic Doppler velocimetry Semtex

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维普期刊数据库

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High Velocity Forming of Aluminum Cylindrical Cups-Experiments and Numerical Simulations

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Journal of Materials Science & Technology 2007年第2期23卷 230-236页

作者： Mustafa YASAR Faculty of Technical Education ZKU/Zonguldak Karaelmas UniversityKarabukTurkey

A new two stage detonation forming machine was developed and cylindrical aluminum cups were formed by using gas detonation forming technology. The forming process was analyzed with the explicit finite element method with various parameters and ANSYS/LS-DYNA software. Defects of wrinkling and rupture were predicted for some forming conditions. The strain and the thickness distribution results were in good agreement with the experimental results. It was seen that thinning and forming mainly take place during the one fourth of the time. The effects of detonation pressure and blank holding force on the deformation of the work pieces were discussed. The numerical results were compared with those obtained in the experiments.

关键词： detonation forming Explicit finite element detonation pressure

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Study on energy output rule on attenuation of small diameter charge detonation wave passing by air-gap

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Journal of Measurement Science and Instrumentation 2012年第3期3卷 215-218页

作者：赵海霞王涑波胡双启焦清介徐新春 Key Laboratory of Instrumentation Science & Dynamic Measurement(North University of China) Ministry of Education State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology

In order to study energy output rule on attenuation of small diameter charge detonation wave passing by air-gap,the detonation shock wave pressures of different charge diameters and confinements,which are attenuated in air-gap,are measured by using the manganin piezoresistance *** the experiential attenuation rule of X booster explosive is obtained with confinement of 45# steel and polymethyl methacrylate(PMMA),the experiential relational expressions in charge diameter and air-gap thickness are *** results indicate that exponential rule is obtained in accordance with attenuation of small diameter charge detonation wave passing by air-gap,and the bigger charge diameter,the smaller modulus *** changing air-gap thickness,the detonation pressure is also *** detonation performance can be controlled by adjusting charge dimension,confinement and air-gap thickness.

关键词： small diameter charge detonation pressure confinement condition attenuation

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Theoretical Studies of oxetane,azetidine and cyclobutane derivatives

Theoretical Studies of oxetane,azetidine and cyclobutane der...

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第九届全国计算（机）化学学术会议

作者： XIAO-WEI FAN XUE-HAI JU (Department of Chemistry,Nanjing University of Science and Technology,Nanjing 210094,

Oxetane,azetidine and cyclobutane derivations are important four-membered ring *** obtain novel high-density and high-energy materials,scientists have managed to attach groups that are essentially needed for the combustion(so-called energetic groups),such as NO,NF,ONO and N groups,to the strained heterocyclic or homocyclic ring to form its derivatives with good explosive *** functional theory(DFT)method has been employed to study the geometric and electronic structures of a scries of four-membered ring compounds at the B3LYP/6-311Gand the B3P86/*** the isedesmic reactions designed for the computation of heats of formation(HOFs),the 3,3-dimethyl-oxetane,azetidine and cyclobutane were chosen as reference *** HOFs for N substituted derivations are larger than that of oxetane compounds with -ONO and/or-NF substituent *** HOFs for oxetane with -ONO and/or -NF substituent groups are negative,while the HOFs for N substituted derivations are *** azetidine compounds,the substituent groups on the azetidine ring affect the HOFs,which increase as the difluoroamino group being replaced by the nitro *** magnitudes of intramolecular group interactions were predicted through the disproportionation *** cyclobutane derivations have the geminal groups,which have larger repulsion *** strain energy(SE)for the title compounds has been calculated using hornodesmotic *** azetidine compounds,the NF group connecting N atom on the ring decrease the SE of title *** stability were evaluated via bond dissociation energies(BDE)at the UB3LYP/*** the oxetane compounds,the O-NO bond is easier to break than that of the C-C bond on the *** the azetidine and cyclobutane compounds,the homolysises of C-NX and/or N-NX(X=O,F)bonds are primal,step for bond *** properties of the title compounds were evaluated by using the Karnlet-Jacobs equation based on the calcul

关键词： oxetane azetidine and cyclobutane derivatives heats of formation density functional theory isodesmic reaction homodesmotic reaction intramolccular group interaction strain energy bond dissociation energy detonation velocity detonation pressure

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1,1'-二氨基-5,5'-偶氮四唑的理论研究（英文）

1,1'-二氨基-5,5'-偶氮四唑的理论研究（英文）

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第六届全国强动载效应及防护学术会议暨2014年复杂介质/结构的动态力学行为创新研究群体学术研讨会

作者：韩志跃赵志华杜志明丛晓民赵林双北京理工大学爆炸科学与技术国家重点实验室

本文运用Gaussian 03程序中的密度泛函(DFT)理论,分别在DFT/6-31G+g(d)、DFT/6-31G++g(d,p)、DFT/6-311G+g(d)、DFT/6-311G++g(d,p)水平下,对1,1’-二氨基-5,5’-偶氮四唑(DAZT)进行几何构型优化。计算结果表明,DFT/6-3 1G水平下优化的结构数据和实验测得的最为吻合。并在此基础上对其静电势能、反应焓、爆速和爆压进行了计算,爆速和爆压分别达到25.44 GPa和7767 m/s,有望在炸药领域得到应用。

关键词： density functional theory optimization electrostatic potential detonation pressure detonation velocit

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