Showing papers in "Composite Structures in 2009"

TL;DR: In this article, the nonlinear bending of simply supported, functionally graded nanocomposite plates reinforced by single-walled carbon nanotubes (SWCNTs) subjected to a transverse uniform or sinusoidal load in thermal environments is investigated.

TL;DR: In this paper, a new higher-order deformable laminated composite plate theory is proposed, which is constructed from 3-D elasticity bending solutions by using an inverse method, and exactly satisfies stress boundary conditions on the top and the bottom of the plate.

TL;DR: A review of the recent development of the finite element analysis for laminated composite plates from 1990 is presented in this paper, where a literature review is devoted to the recently developed finite elements based on the various laminated plate theories for the free vibration and dynamics, buckling and postbuckling analysis, geometric nonlinearity and large deformation analysis, and failure and damage analysis of composite laminated plates.

TL;DR: In this article, free vibration characteristics and the dynamic behavior of a simply-supported beam under a concentrated moving harmonic load are investigated under the assumption of the Euler-Bernoulli beam theory.

TL;DR: In this paper, the main optimization methods for composite laminate with uniform stacking sequence through their entire structure are described, their characteristic features are contrasted, and the potential areas requiring more investigation are highlighted.

TL;DR: In this article, the first-order shear deformation plate theory, in conjunction with the element-free kp-Ritz method, is employed in the current formulation, assuming that the material property of each plate varies exponentially through the thickness.

TL;DR: In this paper, a generalized reciprocal approximation is presented for the design of variable-stiffness laminated composite panels for maximum buckling load, which allows the maximization to be carried out at each discrete node separate from the others.

TL;DR: In this paper, the impact of a rigid sphere onto a high-strength plain-weave Kevlar KM2 ® fabric was modeled using LS-DYNA focusing on the influence of friction and material properties on ballistic performance.

TL;DR: In this paper, a representative volume cell (RVC) is chosen to analyze the progressive damage behavior of 3D four-directional braided composites with large braid angle subjected to uniaxial tension.

TL;DR: In this paper, the impact response of unidirectional glass/epoxy laminates has been investigated by considering energy profile diagrams and associated load-deflection curves, and the penetration threshold for stacking sequence [0/90/+45/−−45] s is found to be smaller than that of [ 0/90/0/ 90] s.

TL;DR: In this paper, the peridynamic theory is employed to predict the damage in center-cracked laminates with different fiber orientations, and the predictions from the analysis agree with the experimental observations published in the literature.

TL;DR: In this article, a servo-hydraulic test jig and a fixture were designed and manufactured for testing composites under uni-axial loading at quasi-static and intermediate strain rates of 0.001−100−1.

TL;DR: In this article, the design problem of maximizing the buckling load factor of laminated multi-material composite shell structures is investigated using the so-called Discrete Material Optimization (DMO) approach.

TL;DR: In this paper, a series of experiments were performed to investigate the effectiveness of the composites on preventing fatigue crack propagation and extending the fatigue life of steel plates, and both single-sided and double-sided repairs were adopted.

TL;DR: In this article, the authors investigated the possibility of using carbon fibre-reinforced polymer (CFRP) rods to strengthen concrete structural members with the near-surface mounted reinforcement (NSM) technique.

TL;DR: In this article, a three-dimensional elasticity analysis of sandwich panels with a functionally graded core subjected to transverse loading is performed, where the Young's modulus of the core is assumed to vary exponentially through the thickness.

TL;DR: In this paper, the optimal angle-ply orientations of symmetric and antisymmetric shells designed for maximum burst pressure were examined, and the Tsai-Wu failure criterion, maximum strain and stress theories were applied for verifying the burst failure pressure of tubes.

TL;DR: In this article, a new NDT approach is presented, based on the monitoring of the nonlinear elastic material behaviour of damaged material, and two methods were investigated: a singlemode nonlinear resonance ultrasound (NRUS) and a nonlinear wave modulation spectroscopy (NWMS).

TL;DR: In this paper, an exact elastic solution for thermal stresses and deformations of the pipes under internal pressure and a temperature gradient has been studied, based on the three-dimensional anisotropic elasticity, and the influence of temperature field in the governing equations of thermoelasticity was considered via a constitutive law.

TL;DR: In this paper, an exact solution for the postbuckling configurations of composite beams is presented, and the equations governing the axial and transverse deformations of a composite laminated beam accounting for the midplane stretching are derived.

TL;DR: In this paper, the viability of carbon reinforced polymeric (FRP) composite materials for use as EMI shielding structures, specifically for aerospace applications, has been discussed, and it was found that carbon fibre could suffice this purpose, but likely required filler materials to enhance electrical conductivity and shielding effectiveness.

TL;DR: In this article, a technique for the design optimization of composite laminated structures is presented, where the optimization process is performed using a GA associated with the finite element method (FEM) for the structural analysis.

TL;DR: In this paper, a semi-analytical approach composed of differential quadrature method (DQM) and series solution is adopted to solve the equations of motions of functionally graded (FG) plates.

TL;DR: In this paper, a 2D higher-order deformation theory is presented for vibration and buckling problems of circular cylindrical shells made of functionally graded materials (FGMs) by using the method of power series expansion of continuous displacement components.

TL;DR: The generalized unified formulation (GUF) as mentioned in this paper is a formal technique which was introduced in the framework of displacement-based theories and has been extended for the first time to the case in which a mixed variational statement is used.

TL;DR: The use of fiber-reinforced polymer (FRP) bars in reinforced concrete (RC) structures has emerged as an alternative to traditional RC due to the corrosion of steel in aggressive environments.

TL;DR: In this article, the inelastic response of blast-loaded sandwich structures, comprising mild steel plates and aluminium alloy honeycomb cores, was investigated and three phases of interaction were identified for each sandwich structure, based upon deformation, contact, crushing and tearing responses of the sandwich components.

TL;DR: In this article, the vibration and stability of freely supported FGM truncated and complete conical shells subjected to uniform lateral and hydrostatic pressures are investigated, where the functionally graded material properties are assumed to vary continuously through the thickness of the conical shell.

TL;DR: In this paper, the static and fatigue properties of honeycomb sandwich composites, made of aramide fibres and aluminium cores, are investigated through four-point bending tests. Damage and failure modes are reported and discussed.

TL;DR: In this article, a study of static deformations and free vibrations of shear flexible isotropic and laminated composite plates with a first-order shear deformation theory is presented.