期刊
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
卷 133, 期 -, 页码 863-882出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmecsci.2017.09.032
关键词
Polygonal finite element method; Laminated composite plates; Shear locking; Wachspress; Piecewise-linear shape function
资金
- Vietnam National Foundation for Science and Technology Development (NAFOSTED) [107.02-2016.19]
In this study, a polygonal finite element method (PFEM) is extended and combined with the C-type higher-order shear deformation theory (C-HSDT) for the static and free vibration analyses of laminated composite plates. Only the piecewise-linear shape function which is constructed based on sub-triangles of polygonal element is considered. By using the analogous technique which relies on the sub-triangles to calculate numerical integration over polygonal elements, the procedure becomes remarkably efficient. The assumption of strain field along sides of polygons being interpolated based on Timoshenko's beam leads to the fact that the shear locking phenomenon can be naturally avoided. In addition, the C-HSDT theory, in which two additional variables are included in the displacement field, significantly improves the accuracy of the displacements and transverse shear stresses. Numerical examples are provided to illustrate the efficiency and reliability of the proposed approach. (C) 2017 Elsevier Ltd. All rights reserved.
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