Showing papers in "Composites Science and Technology in 2000"

TL;DR: Sisal fiber is a promising reinforcement for use in composites on account of its low cost, low density, high specific strength and modulus, no health risk, easy availability in some countries and renewability as discussed by the authors.

TL;DR: In this paper, surface modifications of two varieties of jute fabrics, i.e. hessian cloth (HC) and carpet backing cloth (CBC), involving dewaxing, alkali treatment, cyanoethylation and grafting, have been made with a view to their use as reinforcing agents in composites based on a biodegradable polymeric matrix, Biopol.

TL;DR: In this paper, the authors implemented improved failure criteria for laminated composite structures into LS-DYNA3D and suggested that delamination is constrained by through-thickness compression stress.

TL;DR: In this paper, an overview of the fracture behavior and failure mechanisms of composite laminates containing woven fabrics in mode I and mode II delamination and under impact loading is presented, where potential advantages of using woven fabrics as opposed to cross-ply unidirectional prepreg tapes are discussed from the viewpoint of the microstructure/property relationship.

TL;DR: In this paper, a fluidized bed combustion process was developed for the treatment of thermoset composites in the form of process scrap or end-of-life components, which was shown to be robust, coping with contaminated scrap of variable composition and providing useful outputs, such as recovered fibres, particulate materials and heat.

TL;DR: In this paper, the authors developed a simple model for calculating the energy absorption by polymer composites upon ballistic impact, where three major components were identified as contributing to the energy lost by the projectile during ballistic impact.

TL;DR: In this article, tossa jute fibres were treated with corona discharge and ultraviolet (UV) to improve the mechanical properties of natural-fibre/epoxy composites.

TL;DR: In this paper, a review of the progress made toward realizing an integrated approach in the design and manufacture of three-dimensional textile preforms is presented, with particular attention paid to new developments in textile manufacturing, such as multaxial weaving, multi-axial warp knitting, stitching and braiding.

TL;DR: In this paper, the tribological behavior of self-lubricated aluminium/SiC/graphite hybrid composites with various amount of graphite addition synthesized by the semi-solid powder densification (SSPD) method has been studied.

TL;DR: In this paper, the quasi-static and impact properties of a novel fiber/metal laminate system based on a tough glass-fibre-reinforced polypropylene (GFPP) are investigated.

TL;DR: In this article, a mathematical model of the internal geometry of 2D and 3D woven fabrics is used as a unit-cell geometry preprocessor for meso-mechanical models of composite materials.

TL;DR: In this paper, the tensile, flexural, and impact behaviour of jute roving reinforced polyester composites were investigated as a function of fibre loading and fibre surface wettability.

TL;DR: In this article, it has been demonstrated that cobalt could be plated onto the surfaces of carbon nanotubes by electroless plating, in this manner a layer of cobalt is formed as nanoparticles on the suface of the nanotube.

TL;DR: In this article, the in-plane failure behavior of woven-fabric laminated composite plates has been studied under transverse central low-velocity point impact by using a modified Hertz law and a 3D transient finite element analysis code.

TL;DR: In this paper, a bridging model is used to simulate the mechanical properties of composites reinforced with woven and braided fabrics, which can be used to characterize the elastic, elasto-plastic and ultimate strength behavior of the fabric composites under any arbitrary load condition.

TL;DR: In this paper, a review of the use of modal vibration response measurements to characterize, quickly and accurately the mechanical properties of fiber-reinforced composite materials and structures is presented.

TL;DR: In this article, the acoustic emission characteristics of micro-failure processes in HDPE/PP blends with and without compatibilizer, single-fibre composites (glass/epoxy, carbon/EPoxy, glass/polycarbonate) and unidirectionally reinforced multi-fiberre composite (glass polypropylene) were studied.

TL;DR: In this paper, the effect of maleic anhydride on the swelling and mechanical properties of plant fiber polymer composites has been assessed and the impact strength and Shore-D hardness have been found to be higher in maleic-anhydride-treated fiber composites than the untreated-fiber composites.

TL;DR: In this paper, a Monte Carlo procedure was employed to generate periodic computer models with unit cells comprising of random dispersion of a hundred non-overlapping parallel fibers of different diameter.

TL;DR: In this paper, composite sandwich beams were fabricated by bonding unidirectional carbon/epoxy face sheets (laminates) to aluminum honeycomb cores with an adhesive film, and they were tested under four-point and three-point bending.

TL;DR: Soutis et al. as mentioned in this paper examined the compressive behavior of bonded external patch repairs and showed that compressive loading mode is more severe than tensile mode owing to the instability of delaminated plies, instability of the patch and skin strength reductions occurring under elevated temperatures and absorbed moisture conditions.

TL;DR: In this article, a microbond pull-out test was conducted to evaluate the interlaminar shear strength and T-peel strength of the Kevlar-fiber/Bismaleimide composites.

TL;DR: In this paper, an experimental study was conducted to investigate the accuracy of the four-point bend end-notched flexure (4ENF) test for the determination of mode II delamination toughness.

TL;DR: An analytical model based on the unit cell was developed for the prediction of the geometric characteristics and three-dimensional (3D) engineering constants of 2-D braided textile composites as mentioned in this paper.

TL;DR: The thermal conductivity and thermal diffusivity of sisal-reinforced polyethylene (SRP), GRP and sisal/glass hybrid fiber-reined polyethylenes (GSRP) has been evaluated at cryogenic to high temperature (120-350 K) as mentioned in this paper.

TL;DR: A nonlinear multiscale computational procedure based on the philosophy of multileVEL methods and which exploits the similarity between the classical engineering global–local design practice and multilevel methods is presented.

TL;DR: In this article, the authors proposed a mathematical model to describe the mechanisms of void formation in one-dimensional resin-transfer molding (RTM) experiments, which was then used to analyze new data from one dimensional RTM experiments.

TL;DR: In this paper, the main results of an experimental and numerical investigation on the mechanical behaviour of a composite sandwich primarily designed for naval engineering applications are presented; the skeleton of the sandwich is made of glass-fibre/polymer-matrix composites; their interior layers are connected with interwoven threads called piles which cross the sandwich core.

TL;DR: In this paper, the effects of residual stresses arising from thermal expansion mismatch are taken into account, and a series of very useful inter-relationships between thermo-elastic constants for damaged and corresponding undamaged laminates are derived.

TL;DR: A review of recent developments in the analysis of tapered laminated composite structures with an emphasis on interlaminar stress analysis, delamination analysis and parametric study is presented in this article.