Showing papers in "Composite Structures in 2002"

TL;DR: In this article, principal component thermography (PCT) is applied to the non-destructive inspection of composite structures, and a simple analytical expression is derived that relates a characteristic time furnished by the decomposition to the flaw depth, providing a basis for flaw depth estimation.

TL;DR: In this paper, an analytical formulation and solutions to the static analysis of simply supported composite and sandwich plates based on a higher-order refined theory developed by the first author and already reported in the literature are presented.

TL;DR: In this paper, a mathematical model for fatigue damage evolution in composite materials is developed and compared with those of damage growth in homogeneous materials, which is found to be more accurate than existing models, both in modelling the rapid damage growth early in life and near the end of fatigue life.

TL;DR: In this article, a parametric study was carried out to study the effect of concrete cover, fire exposure time on the FRP temperatures and shear and flexural capacities of reinforced beams.

TL;DR: In this paper, the static and dynamic characteristics of thick composite laminates exposed to hygrothermal environment are studied using a realistic higher-order theory developed recently, which accounts for the nonlinear variation of the in-plane and transverse displacements through the thickness, and abrupt discontinuity in slope of inplane displacements at any interface.

TL;DR: In this article, an MTS machine is employed to apply a compressive load at strain rates of 10 −3 −10 +1 s −1 to these closed-cell aluminium foams.

TL;DR: In this paper, the authors investigated the energy absorption capability of axial crush and bending collapse of aluminum/GFRP hybrid tubes, and two suggested models for the hybrid tube showed a good agreement with the experimental results.

TL;DR: In this article, an analytical procedure is developed to design and predict the behavior of fiber reinforced composite pressure vessels, where the classical lamination theory and generalized plane strain model are used in the formulation of the elasticity problem.

TL;DR: In this article, the authors present a methodology for designing any two-dimensional array of laminated composite panels with varying loads such that continuity of some or all of the plies is maintained across adjacent panels.

TL;DR: In this paper, a zigzag model for symmetric laminated beam is developed, which uses a sine term to represent the non-linear displacement field across the thickness as compared to a third order polynomial term in conventional theories.

TL;DR: In this article, the authors used the finite element method to analyse the behavior of repaired cracks with bonded composite patches in mode I and mixed mode by computing the stress intensity factors at the crack tip.

TL;DR: In this paper, the authors examined the damage mechanisms and reductions to the tensile properties of E-glass yarns during weaving of three-dimensional (3D) fabrics for polymer-based composites.

TL;DR: In this paper, the authors proposed a method for online detection of initial damage in composite structures based on energy variation of structural dynamic responses decomposed using wavelet analysis, which can detect extremely small cracks in composite plates.

TL;DR: In this paper, a post-buckling optimisation procedure for composite stiffened panels subjected to compression loads is presented, based on a global approximation strategy, where the structure response is given by a system of neural networks trained by means of finite element analyses, and on genetic algorithms.

TL;DR: In this paper, the authors describe the development of simple approaches in estimating the deflection of FRP reinforced concrete members subjected to flexural stresses and compare the predictions of these approaches with the experimental results obtained by testing seven prototype concrete beams reinforced with glass fibre reinforced polymer, GFRP, and carbon fiber reinforced polymer (CFRP), bars.

TL;DR: In this article, the optimal design of deep submarine exploration housings and autonomous underwater vehicles was investigated for thin-walled laminated composite unstiffened vessels, where the search of fiber orientations of the composite cylinders that maximize the stability limits was investigated.

TL;DR: In this article, a locking free first-order shear deformable finite element is presented, and its utility in solving free vibration and wave propagation problems in laminated composite beam structures with symmetric and asymmetric ply stacking is demonstrated.

TL;DR: In this paper, filament winding patterns were calculated using a semi-geodesic fiber path equation for an arbitrary surface, where the fiber path depends on the surface where fibers are wound, the winding angle varies in the longitudinal and thickness directions of a wound structure.

TL;DR: In this article, the authors validate a class of refined thin-walled beam model that has been extensively used towards the study, among others, of dynamic response, static aeroelasticity and structural/aero-elastic feedback control.

TL;DR: Kim et al. as discussed by the authors studied the effect of debonding on the flexural stiffness and on the natural frequency of honeycomb sandwich beams with carbon/epoxy laminated composite faces and Nomex-aramid honeycomb core.

TL;DR: In this article, an exact solution for multi-layered filament-wound composite pipes under pure bending was presented, and detailed stress-strain responses and deflection was investigated using the present analytical method.

TL;DR: In this paper, the effects of transverse shear and normal stresses on cross-ply laminated composite and sandwich plates subjected to lateral pressures are analyzed by a global higher-order plate theory.

TL;DR: In this article, a damage identification approach was developed for carbon fiber/epoxy composite laminates with localized internal delamination, which uses distributed piezoelectric transducers to generate and monitor the ultrasonic Lamb wave with narrowband frequency.

TL;DR: In this paper, the authors investigated the fatigue crack growth behavior of cracked aluminum plate repaired with bonded composite patch especially in thick plate and determined the stress intensity factor of patched crack from experimental result by comparing the crack growth behaviour of specimens with and without repair.

TL;DR: In this article, a comparative study of jetting techniques and laser machining technologies for composite materials has been conducted, focusing on the machining of composite materials like epoxy pre-impregnated graphite woven fabric and fibre reinforced plastic materials that are used in aerospace industries.

TL;DR: In this paper, a micro-mechanics model is established to evaluate the effective properties of a layered composite with piezoelectric and piezomagnetic components, where the mechanical and electromagnetic continuity conditions across an interface of two dissimilar media is incorporated, decomposing those quantities such as the stress/strain, electric displacement, electric field intensity, magnetic induction and magnetic field intensity into two orthogonal complementary parts.

TL;DR: In this paper, the authors used the finite element method to determine the strain-energy release rate of a fatigue crack growing along the first ply of a double-lap composite and showed that fatigue failure is mainly driven by tensile mode loading due to the peel stress.

TL;DR: In this article, a geometrically non-linear analysis of thin plate/shell laminated structures with embedded integrated piezoelectric actuators or sensors layers and/or patches is presented.

TL;DR: In this article, a comprehensive finite element (FE) analytical tool to predict the effect of defects and damage in composite structures was developed for rapid and accurate damage assessment, focusing on skin-to-stiffener debonding, a common defect that can critically reduce the performance of composite structures with integral or secondary bonded stiffeners.

TL;DR: A collaborative research program between the Australian Defence Science and Technology Organisation and the DSTO Centre of Expertise in Structural Mechanics at Monash University into the use of optical fibre sensors to monitor the structural health of composite repairs and composite joints is summarized.