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Title of Journal: J Mech Sci Technol

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Abbravation: Journal of Mechanical Science and Technology

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Korean Society of Mechanical Engineers

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DOI

10.1002/adsc.201601131

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1976-3824

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Optimal design of spaced plates under hypervelocit

Authors: Younghoon Kim Jeonghoon Yoo Minhyung Lee
Publish Date: 2012/05/20
Volume: 26, Issue: 5, Pages: 1567-1575
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Abstract

This paper presents a bumper shield design for protection of a satellite structure system subjected to hypervelocity impact above 6 km/s from space debris Especially this study is focused on the optimization of the spaced plates the socalled Whipple shield design using the coupled SPH and Lagrangian FEM methods This is because the SPH is a meshless method and it is efficient in hypervelocity impact analysis involving debris caused by fragmentation and penetration under hypervelocity impact The Whipple shield is composed of multiple spaced plates where the first bumper plate is modeled as particles for SPH simulation while the rear wall is modeled as elements for FEM The appropriate smoothing length and mesh size were determined taking into account computational cost and accuracy and the erosion scheme is adopted to avoid numerical error due to large deformation After verification for the comparison with previous experimental works the optimal plate structure is proposed considering multi design objectives based on parameter optimizationYounghoon Kim received his BS degrees in Aerospace and Mechanical Engineering from Korea Aerospace University Korea in 2009 During his studying for Master’s degree at Yonsei University Mr Kim has studied hypervelocity impact analysis He is working at Samsung Techwin at the present

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