Showing papers in "Composite Structures in 2006"

TL;DR: In this paper, a series of [0/90]3s laminates with varying void contents were fabricated and a characterization of void distribution, size, and shape within the Laminates was obtained using ultrasonic c-scan and optical metallography techniques.

TL;DR: In this paper, the first and third-order shear deformation plate theories, the Mori-Tanaka technique, and approximate the trial solution with multiquadric radial basis functions to analyze free vibrations of functionally graded plates.

TL;DR: In this paper, the physical and mechanical properties of polyolefin bio-composites were evaluated as a function of filler loading and according to filler type as well as with respect to the thermoplastic polymer itself.

TL;DR: In this paper, composite-to-aluminum double lap joints were tested to obtain the failure loads and modes for three types of joints: adhesive bonding, bolt fastening and adhesive-bolt hybrid joining.

TL;DR: In this paper, the effect of nanoclay additives on the mechanical properties of bisphenol A (DGEBA) epoxy resins was investigated, and it was observed that while the addition of Nanoclay significantly increased the elastic modulus and fracture toughness of DGEBA epoxy resin, it also significantly reduced the failure strength and failure strain.

TL;DR: In this article, anisogrid composite lattice structures whose loadbearing shell is formed by systems of geodesic unidirectional composite ribs made by automatic wet winding process are discussed.

TL;DR: In this paper, the strength and fatigue life of hybrid joints with carbon-fibre reinforced plastic adherends have been investigated and the effect of adhesive material properties and laminate stacking sequence on the joint structural behavior and failure modes were determined experimentally.

TL;DR: In this paper, a full-scale 34m composite wind turbine blade was tested to failure under flap-wise loading and local displacement measurement equipment was developed and displacements were recorded throughout the loading history.

TL;DR: In this paper, the lifetime prediction of a horizontal axis wind turbine composite blade is considered and load cases are identified, calculated and evaluated using a full 3D finite element method and the critical zone where fatigue failure begins is extracted.

TL;DR: This work is an attempt to reflect on the work done in the mechanical modeling of fiber-reinforced composite materials using ANN during the last decade.

TL;DR: In this paper, the authors present results of testing six normal strength concrete columns under eccentric loading with different number of layers of fiber reinforced polymers (FRP) and show that wrapping a column with an adequate number of FRP layers will result in higher strength, ductility and energy absorption than a column reinforced with steel bars.

TL;DR: In this paper, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to investigate the quantity and the distribution of nanoclay inside the composites.

TL;DR: In this paper, a genetic algorithm and a theory of the reflection/transmission of electromagnetic waves in a multi-layered RAS were applied to design an optimal RAS composed of MWNT-filled composites.

TL;DR: The failure strength of composite bonded joint is not always proportionate to adhesion strength of adhesive due to the weakness of delamination in composite materials.

TL;DR: In this article, the behaviour of axially loaded flat steel plates strengthened using carbon fiber reinforced polymer sheets was investigated by using nonlinear finite element analysis to predict the failure modes and load capacity.

TL;DR: In this article, the LS-DYNA3D explicit finite element code is used to investigate the compressive properties and crushing response of square carbon FRP (fibre reinforced plastic) tubes subjected to static axial compression and impact testing.

TL;DR: In this paper, a parametric finite element (FE) model has been developed to allow a broad study into the effect of various parameters on the performance of a scarf joint, and the sensitivity of peak stresses determined with respect to changes in scarf angle, adhesive thickness, ply thickness, laminate thickness, over-laminate thickness and lay-up sequence.

TL;DR: In this paper, the influence of thermal environment on the supersonic flutter behavior of flat panels made of functionally graded materials is investigated using the finite element procedure, where the structural formulation is based on first-order shear theory and material properties are assumed to be temperature dependent and graded in the thickness direction according to power law distribution in terms of the volume fractions of the constituents.

TL;DR: In this article, the effect of exfoliated nanoparticles on the properties of epoxy matrix, titanium dioxide and cloisite®30B nanopowder were prepared with the filler content varied from 2 to 10 vol%.

TL;DR: In this paper, the authors investigated the influence of certain factors on the strength of bolted joints in [0/±45/90]s glass fiber reinforced epoxy (GFRE) composites.

TL;DR: Mitrevski et al. as mentioned in this paper investigated the post-impact damage properties of composite laminates impacted by various impactor shapes, including hemispherical, ogival and conical steel impactors.

TL;DR: In this article, a simplified method for determining the effects of bolt-hole clearance on the load distribution in composite multi-bolt joints is presented, which is applicable to joints with a single column of bolts and is an extension of a previous method which did not include clearance effects.

TL;DR: In this article, multi-walled carbon nanotubes (MWNTs) were used to prepare natural rubber (NR) nanocomposites, which achieved an increase in the initial modulus for up to 12 times in relation to pure NR.

TL;DR: In this paper, the buckling and postbuckling experiments on axially compressed, stiffened CFRP curved panels, performed by DLR within the POSICOSS project for validation purposes, and compared experimental results with computations.

TL;DR: In this paper, a 3D model was developed to predict the behavior of CFRP reinforced polymer (CFRP)-concrete composites under fire, and the model showed that the epoxy reached the failure point within a short time under standard fire.

TL;DR: In this paper, a low Earth orbit (LEO) space environment simulation facility, capable of simulating major LEO space environment constituents such as high vacuum, ultraviolet (UV) radiation, thermal cycling and atomic oxygen (AO) atmosphere, is introduced.

TL;DR: In this article, the simultaneous effect of impactor shape and biaxial preload on the impact response of thin glass fiber reinforced polyester laminates was investigated using a specially designed drop weight test rig, specimens were impacted at initial impact energies of 4 J and 6 J using steel flat, hemispherical, ogival and conical impactors.

TL;DR: In this article, a theory for the bending response of web-core sandwich plates is presented, which is evaluated by transforming an originally discrete core into an equivalent homogenous continuum giving a sandwich plate, which follows, thick-face-plate kinematics.

TL;DR: The 4-year running project COCOMAT contributes to this aim by reducing structural weight at safe design; it exploits considerable reserves in primary fiber composite fuselage structures by accurate and reliable simulation of collapse as discussed by the authors.

TL;DR: In this article, an effective model of surface-bounded flat PZT disks based on effective force, moment and displacement is developed for Lamb wave excitation, collection and propagation in isotropic plate and quasi-isotropic laminated composite.