• Title/Summary/Keyword: Aluminum honeycomb shock absorber

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Prediction to Shock Absorption Energy of an Aluminum Honeycomb (알루미늄 허니콤의 충격 에너지 흡수 특성 예측)

  • Kim, Hyun-Duk;Lee, Hyuk-Hee;Hwang, Do-Soon;Park, Jung-Sun
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.39 no.5
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    • pp.391-399
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    • 2011
  • The purpose of this paper is to predict the shock absorbing characteristics of the aluminum honeycomb in a lunar lander. Aluminum honeycomb has been used for shock absorbers of lunar lander due to its characteristics such as light weight, high energy absorption efficiency and applicability under severe space environments. Crush strength of the honeycomb should have strength to endure during shock energy absorbing process. In this paper, the crush strength, which depends on the shape of honeycomb and impact velocity, is estimated using FEM. Ls-dyna is used for finite element analysis of the honeycomb shock absorber. The unit cells of the honeycomb shape are modeled and used for the finite element analysis. Energy absorption characteristics are decided considering several conditions such as impact velocity, foil thickness and branch angle of the honeycomb.

Study of Crush Strength of Aluminum Honeycomb for Shock Absorber of Lunar Lander (달착륙선 충격흡수장치용 알루미늄 허니콤의 Crush Strength에 관한 연구)

  • Kim, Shin;Lee, Hyuk-Hee;Kim, Hyun-Duk;Park, Jung-Sun;Im, Jae-Hyuk;Hwang, Do-Soon
    • Journal of Aerospace System Engineering
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    • v.4 no.3
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    • pp.1-5
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    • 2010
  • Understanding the crushing behaviour of aluminum honeycombs under dynamic loading is useful for crash simulations of vehicles and for design of impacting energy absorbers. In the study of honeycomb crushing under quasi-static, dynamic loading, the most important parameter is crush strength. Crush strength is indicated to energy absorption characteristic of aluminum honeycomb. In this study, Using Finite Element Analysis carried out crush strength of hexagonal aluminum honeycomb then the results was compared with Quasi-static test. Consequently, Crush strength is different in quasi-static loading and dynamic loading about 16%.

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