Browse > Article
http://dx.doi.org/10.7734/COSEIK.2019.32.5.279

A Numerical Investigation for Prediction of Shock Deceleration of Conical Impactor in Gas-Gun Tests  

Yoon, Hee (Agency for Defense Development)
Oh, Jong Soo (Agency for Defense Development)
Jung, Myung-Suk (Agency for Defense Development)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.32, no.5, 2019 , pp. 279-286 More about this Journal
Abstract
In this study, a numerical investigation is conducted for the shock deceleration prediction of a conical impactor in gas-gun tests. With the development of weapon systems, gas-gun tests are required to validate the survivability and structural reliability of devices under test (DUT) in high-G shock environments, such as those over ten thousand Gs or more. As shock endurance is highly influenced by various bird parameters, such as mass, velocity, and pressure, it is important to determine the appropriate test conditions to generate a high-G shock environment. However, experimental repetitive studies are inefficient to validate test conditions in terms of economic aspects. Therefore, a numerical technique is required to replace experimental gas-gun tests. Here, a numerical investigation is conducted with ANSYS AUTODYN using explicit code. Through this investigation, the dynamic behavior of DUT is presented. In addition, the results of numerical studies are verified through a comparison with the experimental results of a gas-gun test.
Keywords
gas-gun; high-G shock; ANSYS AUTODYN;
Citations & Related Records
연도 인용수 순위
  • Reference
1 ANSYS AUTDOYN (2014) Theory Manual Revision 4.3, ANSYS Inc.
2 Cooper, P.W. (1996) Explosive Engineering, Wiley-VCH, Inc., New York, p.480.
3 Cordes, J.A., Vo, P., Lee, J.R., Geissler, D.W., Metz, J.D., Troast, D.C., Totten, A.L. (2013) Comparison of Shock Response Spectrum for Different Gun Tests, Shock & Vib.,20(3), pp.481-491.   DOI
4 Folwes, G.R., Duvall, G.E., Asay, J., Bellamy, P., Feistmann, F., Grady, D., Michaels, T., Mitchell, R. (1970) Gas Gun for Impact Studies, Rev. Sci. Instrum., 41(7), pp.984-996.   DOI
5 Kang, K.H. (1998) Numerical Analysis of Dynamic Impact Between Rigid Honeycomb, Membrane Ductile Material, Doctoral Thesis of Chungnam National University.
6 Steinberg, D.J. (1991) Equation of State and Strength Properties of Selected Materials, LLNL.
7 Yoon, H., Jang, J.Y. (2018) Numerical Study on Gas Gun for High-G Characteristics of Compact Electronic Safety and Arming Device, 2018 The Korea Institute Military Science and Technology