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http://dx.doi.org/10.7734/COSEIK.2014.27.2.71

Numerical Simulation based on SPH of Bullet Impact for Fuel Cell Group of Rotorcraft  

Kim, Hyun Gi (Korea Aerospace Research Institute)
Kim, Sung Chan (Korea Aerospace Research Institute)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.27, no.2, 2014 , pp. 71-78 More about this Journal
Abstract
There is a big risk of bullet impact because military rotorcraft is run in the battle environment. Due to the bullet impact, the rapid increase of the internal pressure can cause the internal explosion or fire of fuel cell. It can be a deadly damage on the survivability of crews. Then, fuel cell of military rotorcraft should be designed taking into account the extreme situation. As the design factor of fuel cell, the internal fluid pressure, structural stress and bullet kinetic energy can be considered. The verification test by real object is the best way to obtain these design data. But, it is a big burden due to huge cost and long-term preparation efforts and the failure of verification test can result in serious delay of a entire development plan. Thus, at the early design stage, the various numerical simulations test is needed to reduce the risk of trial-and-error together with prediction of the design data. In the present study, the bullet impact numerical simulation based on SPH(smoothed particle hydrodynamic) is conducted with the commercial package, LS-DYNA. Then, the resulting equivalent stress, internal pressure and bullet's kinetic energy are evaluated in detail to examine the possibility to obtain the configuration design data of the fuel cell.
Keywords
fuel cell; FSI(Fluid Structure Interaction); LS-DYNA; SPH(Smoothed Particle Hydrodynamic);
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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