Detection and Characterization of Long-Pulse Low-Velocity Impact Damage in Plastic Bonded Explosives

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	Detection and Characterization of Long-Pulse Low-Velocity Impact Damage in Plastic Bonded Explosives
	Chen PW; Huang FL; Dai KD; Ding YS(丁雁生)
刊名	International Journal of Impact Engineering
	2005
通讯作者邮箱	pwchen@bit.edu.cn
卷号	31 期号:5 页码:497-508
ISSN号	0734-743X
通讯作者	Chen, PW (reprint author), Beijing Inst Technol, Natl Key Lab Explos & Safety Sci, Beijing 100081, Peoples R China.
中文摘要	Damage not only degrades the mechanical properties of explosives, but also influences the shock sensitivity, combustion and even detonation behavior of explosives. The study of impact damage is crucial in the vulnerability evaluation of explosives. A long-pulse low-velocity gas gun with a gas buffer was developed and used to induce impact damage in a hot pressed plastic bonded explosive. Various methods were used to detect and characterize the impact damage of the explosive. The microstructure was examined by use of polarized light microscopy. Fractal analysis of the micrographs was conducted by use of box counting method. The correlation between the fractal dimensions and microstructures was analyzed. Ultrasonic testing was conducted using a pulse through-transmission method to obtain the ultrasonic velocity and ultrasonic attenuation. Spectra analyses were carried out for recorded ultrasonic signals using fast Fourier transform. The correlations between the impact damage and ultrasonic parameters including ultrasonic velocities and attenuation coefficients were also analyzed. To quantitatively assess the impact induced explosive crystal fractures, particle size distribution analyses of explosive crystals were conducted by using a thorough etching technique, in which the explosives samples were soaked in a solution for enough time that the binder was totally removed. Impact induces a large extent of explosive crystal fractures and a large number of microcracks. The ultrasonic velocity decreases and attenuation coefficients increase with the presence of impact damage. Both ultrasonic parameters and fractal dimension can be used to quantitatively assess the impact damage of plastic bonded explosives.
学科主题	力学
类目[WOS]	Engineering, Mechanical ; Mechanics
研究领域[WOS]	Engineering ; Mechanics
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000226628800001
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/15888]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Chen PW,Huang FL,Dai KD,et al. Detection and Characterization of Long-Pulse Low-Velocity Impact Damage in Plastic Bonded Explosives[J]. International Journal of Impact Engineering,2005,31(5):497-508.
APA	Chen PW,Huang FL,Dai KD,&丁雁生.(2005).Detection and Characterization of Long-Pulse Low-Velocity Impact Damage in Plastic Bonded Explosives.International Journal of Impact Engineering,31(5),497-508.
MLA	Chen PW,et al."Detection and Characterization of Long-Pulse Low-Velocity Impact Damage in Plastic Bonded Explosives".International Journal of Impact Engineering 31.5(2005):497-508.