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Estimation of Young's and Shear Moduli of a Core in ISB Panel with Woven Metal as Inner Structures  

Ahn, Dong-Gyu (Department of Mechanical Engineering, Chosun Univ.)
Nam, Gyung-Heum (Department of Mechanical Engineering, Graduate School, Chosun Univ.)
Jung, Chang-Gyun (Automotive Steel Applications Research Group, Technical Research Lab. POSCO)
Yang, Dong-Yol (Department of Mechanical Engineering, KAIST)
Publication Information
Journal of the Korean Society for Precision Engineering / v.26, no.11, 2009 , pp. 116-123 More about this Journal
Abstract
The elastic properties of core affect mechanical properties and deformation behaviours of the lightweight sandwich panel. The objective of the present paper is to estimate experimentally Young's and shear moduli of a core in internally structured boned (ISB) panel with woven metal as inner structures using the deflection theory of sandwich beam considered core stiffness. Three points bending experiments were performed to obtain force-deflection curves of the designed ISB panel in each material direction. The elastic and shear moduli of the core in each material direction were estimated from slopes and intercepts of relationships between compliance per the span length and square of the span length, respectively. The results of the estimation showed that the fabric technology of the woven metal affects the variation of the elastic properties in the core. Through the comparison of shear moduli and force-deflection curves of the proposed method and those without considering the core stiffness, it was shown that the core stiffness should be considered to estimate properly the Young's and shear moduli of ISB panels. Finally, the contribution ratio of bending and shear deflections of ISB panels to the total deflection was quantitatively examined.
Keywords
ISB Panel; Woven Metal; Young's Modulus; Shear Modulus; Three-points Bending Test; Core Stiffness; Material Direction;
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Times Cited By KSCI : 4  (Citation Analysis)
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