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Bending Effect of Laminated Plates with a Circular Hole Repaired by Single-Sided Patch Based on p-Convergent Full Layerwise Model  

Woo, Kwang-Sung (영남대학교 건설시스템공학과)
Yang, Seung-Ho (영남대학교 건설시스템공학과)
Ahn, Jae-Seok (영남대학교 공업기술연구소)
Shin, Young-Sik (영남대학교 건설시스템공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.22, no.5, 2009 , pp. 463-474 More about this Journal
Abstract
Double symmetric patch repair of existing structures always causes membrane action only, however, in many cases this technique is not practical. On the other hand, the bending stiffness of the patch and the skin increases as tensile loading is increased and affects the bending deformation significantly in the case of single-sided patch repair. In this study, the p-convergent full layerwise model has been proposed to determine the stress concentration factor in the vicinity of a circular hole as well as across the thickness of plates with single-sided patch repair. In assumed displacement field, the strain-displacement relations and 3-D constitutive equations of a layer are obtained by the combination of 2-D and 3-D hierarchical shape functions. The transfinite mapping technique has been used to represent a circular boundary and Gauss-Lobatto numerical integration is implemented in order to directly obtain stresses occurred at the nodal points of each layer without other extrapolation techniques. The accuracy and simplicity of the present model are verified with comparison of the previous results in literatures using experiment and conventional 3-D finite element. Also, the bending effect has been investigated with various patch types like square, circular and annular shape.
Keywords
p-convergent full layerwise model; single patch repair; circular hole; transfinite mapping; Gauss-Lobatto integration; out-of-plane bending effect;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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