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http://dx.doi.org/10.5139/JKSAS.2020.48.4.269

Development of an Explosive Bolt for Sled Test Application  

Lee, Juho (Department of Aerospace Engineering, University of Ulsan)
An, Woo-Jin (The 4th Research and Development Institute, Agency for Defense Development)
Kim, Yong-Seok (The 4th Research and Development Institute, Agency for Defense Development)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.48, no.4, 2020 , pp. 269-275 More about this Journal
Abstract
An explosive bolt is one of many representative pyrotechnic release devices that separates two joined structures using explosives inside the bolt. In this study, a 1/2 inch ridge-cut explosive bolt with an EBW detonator was developed for usage in sled tests. The initial shape design was carried out based on the design method, and the performance test showed that the separation performance was outstanding but fragments occurred. Therefore, numerical analysis was performed to reduce the amount of debris by minimizing the amount of explosives. From the numerical analysis, the separation mechanism and characteristics of the ridge-cut explosive bolts were identified, and the minimum amount of explosives that does not generate debris was proposed. Verification tests revealed that the ridge-cut explosive bolts with the proposed explosive weight minimized fragments while maintaining the separation performance.
Keywords
Pyrotechnic Release Device; Ridge-cut Explosive Bolt; Sled Test; AUTODYN;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 Lee, J., "Numerical Analysis of MDF for Aluminum Plate Cutting", Journal of the Korean Society of Propulsion Engineers, Vol. 22, No. 6, 2016, pp. 134-141.   DOI
2 Lee, H.-N., Jang, S.-G., and Oh, J.-Y., "Reliability Prediction of a Pin Puller," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 41, No. 8, 2013, pp. 625-631.   DOI
3 Bement, L. J., and Schimmel, M. L., "A manual for pyrotechnic design, development and qualification," NASA Technical Memorandum, NASA TM 110172, 1995.
4 Lee, J., Han, J.-H., Lee, Y. J., and Lee, H. J., "Separation characteristics study of ridge-cut explosive bolts," Aerospace Science and Technology, Vol. 39, 2014, pp. 153-168.   DOI
5 Lee, J., Han, J.-H., Lee, Y. J., and Lee, H. J., "A Parametric Study of Ridge-cut Explosive Bolts using Hydrocodes," International Journal of Aeronautical and Space Sciences, Vol. 16, No. 1, 2015, pp. 50-63.   DOI
6 Poncelet, E.F., "Theory of Ridge-Cut," Stanford Research Institute Internal Report, 006-54, 1954.
7 Lee, J., Hwang, D.-H., Jang, J.-K., Kim, D.-J., Lee, Y., Lee, J.-R., and Han, J.-H., "Pyroshock Prediction of Ridge-cut Explosive Bolts Using Hydrocodes", Shock and Vibration, Vol. 2016, 2016, Article ID 1218767.
8 Lee, S.-E., Lee, J., and Moon, M.-A., "Study on Penetration Performance of Precision Linear Shaped Charge," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 47, No. 6, 2019, pp. 397-404.   DOI
9 Lee, E. L., Hornig, H. C., and Kury, J. W., "Adiabatic expansion of high explosive detonation products," Lawrence Radiation Laboratory, UCRL-50422, 1968.
10 Meyers, M. A., Dynamic Behavior of Materials, Wiley, New York, 1994.