Hygrothermally induced buckling analysis of elastically supported laminated composite plates with random system properties

Abstract

The article presents hygrothermally induced buckling of geometrically linear laminated composite plates resting on two parameters Pasternak elastic foundation subjected to moisture and temperature-independent and -dependent material properties with random system properties. System properties such as elastic moduli, shear moduli of the constituent materials, hygroscopic contraction coefficients, thermal expansion coefficients, and foundation stiffness parameters are modeled as independent basic random variables. A computationally efficient C 0 finite element method combined with Taylor series based mean-centered first-order perturbation technique via higher order shear deformation plate theory is used to solve the random eigenvalue problem. Typical numerical results for dimensional mean and coefficient of variance of hygrothermally induced buckling load of laminated composite plate subjected to uniform hygrothermal loadings are examined with uniform moisture concentration and temperature rise, plate thickness and aspect ratios, total number of plies, fiber orientations, elastic foundations, and different boundary conditions with random system properties. The numerical results obtained by the present solution approach are validated with those available in the literatures and independent Monte Carlo simulation.

Macro-mechanical analysis of tensile strength of glass/carbon fiber reinforced plastics hybrid composites under hydrothermal environment

“…Reference [22], in this study, the lamina elastic parameters (E 11 , E 22 , G 12 , G 23 ), coefficient of damp thermal expansion (β 11 , β 21 , α 11 , α 21 ), in the hydrothermal environment has a linear relationship with the temperature change (T 1 ) and the moisture absorption rate (C 1 ). as follows According to the positive axis stiffness matrix, the off-axis stiffness matrix of any layer (assuming the kth layer) of the fiber-reinforced composite lamina can be calculated as follows:…”

“…The material's hydrothermal performance degradation constant [25] is shown in table 4. The hydrothermal constant coefficient in the lamina performance degradation model under hydrothermal environment [22] is shown in table 5.…”

Thermal buckling response and fracture analysis for delaminated fiber reinforced composite plates under thermo-mechanical coupling

“…However, these structures are often subjected to severe thermal environments and thermo-mechanical loads as a primary design factor in specific cases. 1–4 The fiber reinforced composite structures are far from being perfect and frequently lead to a geometrical or material imperfection, reducing the stiffness and strength of the designed composite structure. In particular, delamination is one of the major limiting factors for the lifetime of these structures.…”

Large Amplitude Vibration Analysis of Laminated Composite Spherical Panels Under Hygrothermal Environment

“…Hygrothermally induced nonlinear postbuckling response of elastically supported laminated composite plate with random system properties was studied by Kumar and Patil. 22 They used a stochastic nite element macromechanical model based on the HSDT in von-Karman nonlinear kinematics. The e®ects of temperature, moisture, delamination size and di®erent boundary conditions on the natural frequencies of woven¯ber glass/epoxy delaminated composite plates were analyzed through combined numerical (FEM) and experimental investigation by Panda et al 23 They modeled the composite plate model based on the FSDT considering the changes in thermo-mechanical properties due to combined temperature and moisture e®ect.…”