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Study on dynamic compression properties of egg-box sandwich structure
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Affiliation:

University of Science and Technology Beijing

Clc Number:

TG306

Fund Project:

Basic and Applied Basic Research Fund for Guangdong province

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    Abstract:

    Egg-box structure is a new type of periodic single cell lightweight structure, which has the characteristics of low density, high specific strength and high energy absorption capacity.Was established based on finite element method in this paper, surface with a plane egg box type sandwich board egg carton drop hammer impact model of sandwich panels, a comparative analysis of its impact resistant properties, and the different egg box type structure under the condition of dynamic compression mechanical properties were analyzed, the results show that the impact of sandwich board goes through three stages, including the compression stage as the main stage of energy absorption, through the impact kinetic energy is transformed into the sandwich board plastic dissipation can to achieve the goal of buffer energy absorption.At the same time, these characteristics depend on the forming height and the thickness of upper and lower panels and other structural parameters. When the forming height of single-cell structure is 6mm,the period of single cell is 20mm ,the thickness of upper and lower panels is 0.5mm, and the radius of curvature is 400mm, the composite egg-box sandwich panel has better mechanical properties.

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[Qin Qin, Jianwei Wang, Xingyan Liu, Lin Zheng. Study on dynamic compression properties of egg-box sandwich structure[J]. Rare Metal Materials and Engineering,2021,50(11):4103~4112.]
DOI:10.12442/j. issn.1002-185X.20200908

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History
  • Received:November 24,2020
  • Revised:January 05,2021
  • Adopted:February 04,2021
  • Online: November 30,2021
  • Published: November 24,2021