A cutout isogeometric analysis for thin laminated composite plates using level sets

Published on Sep 1, 2015in Composite Structures5.138
· DOI :10.1016/J.COMPSTRUCT.2015.03.016
Shuohui Yin18
Estimated H-index: 18
(Hohai University),
Tiantang Yu32
Estimated H-index: 32
(Hohai University)
+ 2 AuthorsSohichi Hirose15
Estimated H-index: 15
(TITech: Tokyo Institute of Technology)
Source
Abstract
Abstract Numerical modeling with treatment of trimmed objects such as internal cutouts in terms of NURBS-based isogeometric analysis presents several challenges, primarily due to the tensor product of the NURBS basis functions. In this paper we develop a new simple and effective isogeometric analysis for modeling buckling and free vibration problems of thin laminated composite plates with cutouts. We adopt the classical plate theory for the present formulation. The new approach can nicely overcome the drawbacks in modeling complex geometries with multiple-patches as the level sets are used to describe the internal cutouts; while the numerical integration is used only inside the physical domain. Numerical examples with complicated shapes are considered and analyzed to show the influences of cutout geometry, fiber orientation, boundary conditions, etc. on natural frequency and buckling behaviors of laminated plates. The results are compared with reference solutions showing a high accuracy of the proposed method.
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