Singular Behavior of Laminated Skew Composite Materials with Cross-Ply Stacking

Abstract:

This study deals with effects depending on skew angles in skewed-laminated composite materials in macroscopic point of view. Based on higher-order approximation of displacements, subparametric layer-wise finite elements are used to analyze skewed-laminated composite systems. The elements have higher-order shape functions derived from the Lobatto shape functions. The modes of the elements are classified into three groups such as vertex, side, and internal modes. The vertex modes have physical meaning, while side and internal modes with respect to the increase of order of the Lobatto shape functions do not have physical meaning but improve accuracy of analysis. Therefore, fixing mesh arrangement of present analysis, the quality of the analysis can be enhanced without re-meshing work. The approach based on p-version of finite element method is implemented with three-dimensional elasticity theory, while shape functions are developed by combination of one- and two-dimensional shape functions, not using three-dimensional shape functions. Using the accurate and practical proposed technique, macroscopic behavior of skewed-laminated composite materials is investigated.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 1640-1645
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.1640
• Online since: June 2012
• Authors: Jae Seok Ahn, Kwang Ik Son, Kwang Sung Woo, Young Shik Shin
• Keywords: Laminated Composite, Layer-Wise Theory, Lobatto Shape Functions, p-Version of Finite Element Method (p-FEM), Skew Plate

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