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Structural Analysis of the Aluminum Extrusion Plate with Truss-Core  

장창두 (서울대학교 조선해양공학과)
이병삼 (삼성중공업 연구소)
하윤석 (서울대학교 조선해양공학과)
김호경 (서울대학교 조선해양공학과)
송하철 (서울대학교 조선해양공학과)
문형석 (한국철도기술연구원)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.16, no.2, 2003 , pp. 133-140 More about this Journal
Abstract
The sandwich plate has been widely used as an efficient structural member because it has high strength-to-weight and high stiffness-to-weight ratios. To properly design the aluminum extrusion plate , it is necessary to analyze structural behaviors of the extrusions, however, the aluminum extrusions have been rarely studied until now. In the optimization process through numerous iterative calculations, finite element analysis of the sandwich plate with hollow core section requires a considerable amount of computation time and cost. In this paper, the aluminum extrusion plate with truss-core is transformed into an equivalent homogeneous orthotropic plate with appropriate elastic constants. The procedure to evaluate accurate equivalent elastic constants is also established. Using these elastic constants, simple theoretical formulas of the stresses and deflection are proposed in case of the simply-supported orthotropic thick plate under uniform pressure. Through the comparison with the results by commercial FEM code(ANSYS), it is verified that the proposed simpified formula has a good efficiency and accuracy.
Keywords
aluminum extrusion plate; equivalent stiffness; orthotropic plate; hollow section; sandwitch plate;
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