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http://dx.doi.org/10.5139/JKSAS.2011.39.5.391

Prediction to Shock Absorption Energy of an Aluminum Honeycomb  

Kim, Hyun-Duk (한국항공대학교 대학원)
Lee, Hyuk-Hee (한국항공대학교 대학원)
Hwang, Do-Soon (한국항공우주연구원)
Park, Jung-Sun (한국항공대학교 항공우주 및 기계공학부)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.39, no.5, 2011 , pp. 391-399 More about this Journal
Abstract
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.
Keywords
Aluminum honeycomb shock absorber; Crush strength; Finite element method; Ls-dyna;
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