Journal
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
Volume 350, Issue -, Pages 337-361Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2019.02.028
Keywords
Size-dependent; Thermal bending; Thermal buckling; New modified couple stress; Composite laminate microplate; Length scale ratio
Funding
- VLIR-OUS TEAM Project - Flemish Government [VN2017TEA454A103]
- Academy of Finland [304122]
- Academy of Finland (AKA) [304122, 304122] Funding Source: Academy of Finland (AKA)
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The use of modified couple stress theory to simulate the size-dependent phenomenon of composite laminate microplate is commonly limited to simple boundary conditions and mechanical bending load. The small-scale effects on bending and buckling on composite laminate microplate under complex boundary conditions in thermal environment have not been understood fully in the literature. Hence, this research develops, for the first time, a model to overcome the above limitation through the combination of a new modified couple stress theory and isogeometric analysis (IGA). By solving the governing equation using IGA, the thermal displacement, stress and thermal buckling load for various material length scale parameters are obtained. To satisfy the continuous shear stress condition at the layer interfaces, the equilibrium equations as integrated in-plane stress derivatives over the thickness are imposed. In addition, the non-uniform rational B-splines (NURBS) satisfy the higher-order derivative of shape function using the equilibrium equation. Furthermore, to show the effectiveness of presented model for capturing the size effect on thermal bending and thermal buckling of multi-ply laminate microplate, the influences of fiber orientation, thickness ratio, boundary condition and the variation in material length scale parameter are investigated. (C) 2019 Elsevier B.V. All rights reserved.
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