Experimental Study and Computational Simulation for Shock Characteristics Estimation of Okinawa’s Soils “Jahgaru”


  • Y Higa
  • H Iyama
  • K Shimojima
  • M Nishi
  • S Itoh




To clarify the shock characteristics of Okinawa’s unique soils “Jahgaru” that is widely distributed in southern part of Okinawa Main Island, an experimental investigation of dynamics properties such as shockwave propagation, pressure and particle velocity have been performed using impedance matching method. Therefore, we have also obtained the Hugoniot date of “Jahgaru”. And then, to reveal a validity of the material characteristics, a computational model for the experimental procedure using ALE simulation have been developed. A comparison between numerical results and experimental ones, the capability of proposed method through the numerical simulations have been confirmed.


S.S. Bakari, S.A. Vuai and A. Tokuyama: Forest soil fertility in Okinawa Island, subtropical region in Japan, Bulletin of the College of Science. Univ. Ryukyus: No.78, (2004), pp.267-284.

H. Hornberg: Determination of Fume State Parameters from Expansion Measurements of Metal Tubes, Propellants, Explosives, Pyrotechnics Vol.11, Issue 1 (1986), pp.23-31. https://doi.org/10.1002/prep.19860110106

I.F. Lan, S.C. Hung, W.M. Lin, C.Y. Chen, Y.M. Niu and J.H. Shiuan: A simple method of deducing JWL parameters from cylinder expansion test, Sci. Tech. Ener. Mat. Vol.53, No.3 (1992), pp149-157. https://doi.org/10.1002/prep.19930180104

S. Itoh, Z. Liu and Y. Nadamitsu: An investigation on the properties of underwater shock wave generated in underwater explosive of high explosive, ASME J. Pressure Vessel Technol. Vol.119 (1997), pp.498-502. https://doi.org/10.1115/1.2842336

A. Osada, H. Hamashima, Y. Kato and S. Itoh: Study on low velocity detonation phenomena in nitromethane, Int. J. Multiphysics Vol.3, No.1 (2009), pp.1-10. https://doi.org/10.1260/175095409787924517

M. Otsuka, H. Maehara, M. Souli and S. Itoh: Study on development of vessel for shock pressure treatment for food, Int. J. Multiphysics Vol.1, No.1 (2007), pp.69-84. https://doi.org/10.1260/175095407780130490

S. Irie, K. Greg, Z. Ren and S. Itoh: Dynamic property of aluminum foam, Int. J. Multiphysics, Vol.4, No.2 (2010), pp.103-111. https://doi.org/10.1260/1750-9548.4.2.103

O. Higa, R. Matsubara, K. Higa, et al.: Mechanism of the shock wave generation and energy efficiency by underwater discharge, Int. J. Multiphysics Vol.6, No.2 (2012), pp.89-97. https://doi.org/10.1260/1750-9548.6.2.89

O. Higa, A. Yasuda, Y. Higa, K. Shimojima, K. Hokamoto and S. Itoh: Optical examination of shockwave propagation induced by an underwater wire explosion, Int. J Multiphysics Vol.10, No.4 (2016), pp.343-353. https://doi.org/10.21152/1750-9548.10.4.343

C.W. Hirt, A.A. Amsden and J.L. Cook: An Arbitrary Lagrangian Eulerian Computing Method for All Flow Speeds, J. Computational Physics Vol.14, No.3 (1974), pp.227-253. https://doi.org/10.1016/0021-9991(74)90051-5

C.L. Mader: Numerical Modeling of Detonations, University of California Press (1979). [12] S.P. Marsh: LASL Shock Hugoniot Data, University of California Press, Berkeley (1980). https://doi.org/10.1177/058310248101300606

S.P. Marsh: LASL Shock Hugoniot Data, University of California Press, Berkeley (1980).



How to Cite

Higa, Y., Iyama, H., Shimojima, K., Nishi, M. and Itoh, S. (2017) “Experimental Study and Computational Simulation for Shock Characteristics Estimation of Okinawa’s Soils ‘Jahgaru’”, The International Journal of Multiphysics, 11(3), pp. 245-254. doi: 10.21152/1750-9548.11.3.245.




Most read articles by the same author(s)

1 2 3 4 > >>