Optimization of Damaged Composite Plates Under Buckling and Post buckling condition in Hygrothermal Environment employing an Inverse Hyperbolic Shear Deformation Theory

Abstract

This paper deals with the incorporation of Inverse Hyperbolic Shear Deformation Theory (IHSDT), optimization with Unified Particle Swarm Optimization (UPSO) method and damage incorporation in buckling analysis of composite structures which all has received no attention yet. In the present investigation, buckling and post buckling analysis under hygrothermal loads using IHSDT, optimization of the critical buckling temperature of laminated plates considering the fiber orientation as design variable by employing a UPSO algorithm, effect of damage in buckling behaviour using an anisotropic damage model, etc. of laminated composite plates are discussed. FEM formulation and programming in MATLAB environment have been done. Optimized critical buckling temperature of laminated plates with internal flaw is found out with the fiber orientation as design variable. The outcomes and remarks from this work will assist to address some key issues concerning composite structures. Nomenclature u 0 , v 0 , w 0 = midplane displacements θ x, θ y = rotations at the midplane [K], [K nl ], [K G ] = global linear, nonlinear, and geometric stiffness matrices {U} = global displacement field λ cr = inplane magnification factor h = thickness of the plate w = maximum out of plane displacement θ l = ply angles of n layers T= temperature x i (t), v i (t) = position and velocity of particles at t th iteration of optimization rand = random numbers lying between 0 and 1 R, u = constriction and unification factors pbest, gbest, lbest = previous best position of particle itself, global best, and local best parameters of UPSO Γ 1 , Γ 2 = anisotropic damage parameters

Passive control of damaged composite laminates with optimized location of piezoelectric fiber composite patches

“…Readers may also consult the detailed formulation of PSO given by Sreehari and Maiti [40]. Algorithm will lead to a converged solution after several iterations.…”

Review of composite – laminated material analysis in MATLAB using Piezo – electric sensor and actuator

“…Finally, the software Matlab has been analyzing a smart laminated plate based on the inverse hyperbolic shear deformation theory (IHSDT) to create a finite element approach text code in Matlab software used to analyze of bending and buckling of a smart composite plate. The approval of as of late created (IHSDT) demonstrated a smart composite structure by the examination in [40][41][42][43][44] and numerical problems indicating the varieties in the buckling behavior of a smart composite plate for different parametric varieties are introduced. Additionally, in this study, a numerical example of control on the deflection and buckling load capacity is introduced as an inner defect of stacking layers of composite plates.…”