Showing papers in "Composite Structures in 1996"

TL;DR: In this paper, a theoretical model was developed for predicting the elastic constants of honeycombs based on the deformation of the honeycomb cells by flexure, stretching and hinging, which can be used to derive expressions for the tensile moduli, shear moduli and Poisson's ratios.

TL;DR: In this paper, an investigation was made into the feasibility of developing polymer matrix composites which have the ability to self-repair internal cracks due to mechanical loading, focusing on the cracking of hollow repair fibers dispersed in a matrix.

TL;DR: In this article, a two-dimensional finite element analysis involving the three-layer technique is introduced to investigate the repair of cracked metallic structures using an adhesively bonded composite patch.

TL;DR: In this paper, an end-loaded split (ELS) test for measuring the stable crack growth resistance of composites under mode II loading was used to determine the effective crack length in the range of large deflection.

TL;DR: In this article, a mathematical model based on a layerwise theory is developed for laminated composite beams with piezoelectric actuators, and a finite element model is developed.

TL;DR: In this paper, three-dimensional finite element analysis was used to simulate progressive failure of a plain weave composite subjected to in-plane extension, where the loading was parallel to one of the tow directions.

TL;DR: In this paper, a finite element model for the deflection control of plates with piezoelectric actuators is presented, which contains an actuator element, an adhesive interface element and an eight-node isoparametric plate element.

TL;DR: In this paper, an automotive frame rail of hourglass cross-section, made of a glass fibre/vinylester composite, was designed for use in the apron construction of the car in order to obtain a high degree of crashworthiness at this location of the body.

TL;DR: In this article, a general governing equation set is derived for [0 m, 90 n ] s laminates that involves only in-plane stresses in both layers, based on equilibrium, continuity and boundary conditions.

TL;DR: In this article, the optimal design of uniaxially loaded laminated plates subject to elastic in-plane restraints along the unloaded edges is given for a maximum combination of prebuckling stiffness, postbuckling stiffness and buckling load.

TL;DR: In this article, the impact damage in sandwich beams consisting of graphite/epoxy face sheets and Rohacell foam core was investigated and a finite element analysis was performed to predict the onset of matrix cracking composite laminate using the maximum principal stress failure criterion.

TL;DR: In this paper, the authors present finite element results and some experimental data on the free vibration of symmetric laminated composite plates containing a central hole, which are typically found in aircraft structural applications.

TL;DR: In this paper, a higher-order shell theory for symmetric laminated composites is presented, where the in-plane displacement fields are obtained by superimposing a globally cubic varying displacement field on a zigzag linearly varying one.

TL;DR: In this paper, an analysis of cracking evolution in cross-ply composite laminates under general in-plane mechanical loading has been presented, but this time under thermal loading, and the influence of temperature amplitude on damage is investigated throughout tests.

TL;DR: In this article, a numerical formulation is compared with an analytical solution of the response of a simply-supported composite plate subjected to an impact load, which utilizes the Newmark integration method to solve the non-linear integral equation.

TL;DR: In this article, the beam-line method and the frame analysis are used to predict the static behavior of linear elastic plane frames having real connections, second-order deflections and shear deformable members.

TL;DR: In this article, a method is developed to revise the elastic properties of a thin composite plate vibration model in an iterative manner such that its modified analytical responses eventually match those obtained experimentally.

TL;DR: In this paper, the authors investigated the applicability of scaled down models in designing laminated composite structures, and showed that distorted models with a different number of layers and geometries than those of the prototype can predict the behavior of a prototype with good accuracy.

TL;DR: In this article, a series of lateral buckling tests on a pultruded GRP I-section cantilever beam were described, and the results showed that significant vertical free end deflections develop before the cantilevers buckles laterally.

TL;DR: In this article, the authors presented the application of micro/macromechanics models and optimization techniques for the optimum design of pultruded glass fiber-reinforced plastic composite I-beams with respect to material architecture: fiber orientations and fiber percentages.

TL;DR: In this article, the impact performance of carbon-fibre composites made from carbon-composite panels was investigated for low-velocity impacts to the skin in the bay between stringers, over a stringer foot, and over the stringer centreline.

TL;DR: In this article, a theory for linearly elastic deformation of shells made of laminated composite materials, including shear deformation and rotary inertia effects, is presented. But this theory is not applicable to shells of arbitrary curvature, but constant thickness.

TL;DR: In this paper, a theory for hollow composite beams with arbitrary crosssection and thick walls is presented, which efficiently accounts for transverse shear, primary and secondary torsional warping, and threedimensional (3D) elastic effects in laminated beam walls which are accentuated as the wall thickness increases.

TL;DR: In this article, the results of an analysis effort that studied the mechanics of the interaction between the z-fiber reinforcement and the structure in which it is embedded were reported. Specific issues that were addressed in these analyses include thermal loadings, crack initiation, crack growth and load transfer.

TL;DR: In this paper, a geometrically non-linear composite shell element based on the updated Lagrangian method is presented to study the buckling behaviour of laminated plates and shells under axial compression.

TL;DR: In this article, a higher-order theory is used to develop a discrete finite element model for the linear buckling analysis of multilaminated composite plate-shell structures, which is based on an eight node isoparametric element with 10 degrees of freedom per node.

TL;DR: In this article, the effect of impact damage on residual compressive strength of thick glass-fibre reinforced woven fabric laminates has been investigated, and it is demonstrated that damage force and incident kinetic energy (IKE) maps can be used to identify damage initiation.

TL;DR: In this paper, the stresses and failure maps in a sandwich beam that consists of a transversely flexible compressible core between two laminated composite skins are determined using a general, systematic rigorous, and high-order analysis that is based on variational principles, and includes the flexibility effects of the core on the global and local bending behavior of the beam.

TL;DR: In this article, the fatigue failure functions are established on a laminate level and thus the calculated uniaxial properties, in this case with the Tsai-Hill failure criterion, will reflect the overall behaviour of the laminate.

TL;DR: A theoretical analysis for the free vibration of multilayered orthotropic circular cylindrical shells filled with non-viscous, incompressible fluid has been developed in this paper.