Effects of Boundary Conditions in Laminated Composite Plates Using Higher Order Shear Deformation Theory |
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Authors: | Pervez Tasneem Al-Zebdeh Khalid Farooq K S Al-Jahwari |
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Affiliation: | (1) Department of Mechanical and Industrial Engineering, College of Engineering, Sultan Qaboos University, Muscat, Sultanate of Oman |
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Abstract: | This paper extends the applicability of a modified higher order shear deformation theory to accurately determine the in-plane
and transverse shear stress distributions in an orthotropic laminated composite plate subjected to different boundary conditions.
A simpler, two-dimensional, shear deformable, plate theory accompanied with an appropriate set of through-thickness variations,
is used to accurately predict transverse shear stresses. A finite element code was developed based on a higher order shear
deformation theory to study the effects of boundary conditions on the behavior of thin-to-thick anisotropic laminated composite
plates. The code was verified against three dimensional elasticity results. The study also compared the stresses and deformation
results of higher order theory with those obtained using commercial software such as LUSAS, ANSYS and ALGOR. The commercial
software are heavily used by designers to design various components/products made of composites. Various combinations of fixed,
clamped and simply supported boundary conditions were used to verify a large class of anticipated applications. Results obtained
from software are in good agreement for some cases and significantly differ for others. It was found that LUSAS and ANSYS
yield better results for transverse deflection and in-plane stresses. But for transverse shear stresses, it is highly dependent
on boundary conditions. |
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