Knowledge Management System of Institue of Mechanics, CAS
| 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); Chen, PW (reprint author), Beijing Inst Technol, Natl Key Lab Explos & Safety Sci, Beijing 100081, Peoples R China.
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| Source Publication | International Journal of Impact Engineering
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| 2005 | |
| Volume | 31Issue:5Pages:497-508 |
| ISSN | 0734-743X |
| Abstract | 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. |
| Subject Area | 力学 |
| DOI | 10.1016/j.ijmpeng.2004.01.008 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000226628800001 |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/15888 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Chen, PW (reprint author), Beijing Inst Technol, Natl Key Lab Explos & Safety Sci, Beijing 100081, Peoples R China. |
| Recommended Citation 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,&Chen, PW .(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. |
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