Showing papers in "Composites Science and Technology in 2001"

TL;DR: A review of recent advances in carbon nanotubes and their composites can be found in this article, where the authors examine the research work reported in the literature on the structure and processing of carbon Nanotubes.

TL;DR: An overview of various biomedical applications of polymer-composite materials reported in the literature over the last 30 years is presented in this paper, where the critical issues and scientific challenges that require further research and development of polymer composite materials for their increased acceptance in the biomedical industry are also highlighted.

TL;DR: In this article, the effect of fiber treatment on the mechanical properties of unidirectional sisal-reinforced epoxy composites was investigated, and the relationship between optimized fiber treatment and performance improvement of sisal composites is proposed.

TL;DR: In this article, the vibrational potential energy of a nano-structured material with the strain energy of representative truss and continuum models has been used to determine the effective continuum geometry of a graphene sheet.

TL;DR: In this article, an elasticity solution for a functionally graded beam subjected to transverse loads is obtained, where Young's modulus of the beam is assumed to vary exponentially through the thickness, and the Poisson ratio is held constant.

TL;DR: In this paper, surface modifications of coir fibres involving alkali treatment, bleaching, and vinyl grafting are made in view of their use as reinforcing agents in general-purpose polyester resin matrix.

TL;DR: In this paper, the thermal behavior of polystyrene composites reinforced with short sisal fibres was studied by means of thermogravimetric and dynamic mechanical thermal analysis.

TL;DR: In this article, the parabolic Mohr failure criterion was applied to experimental results under different loading conditions and the results of the mechanical tests and a fractographic study of the fracture surfaces were correlated with the stress-state-dependent strength and fracture stress of the epoxy resin.

TL;DR: In this article, a new hybrid approach is developed by incorporating the geometrically necessary dislocation strengthening effect into the incremental micromechanical scheme, and the particle-size-dependent inelastic deformation behavior of MMCp is given.

TL;DR: In this paper, the effect of voids on carbon/epoxy and carbon/bismaleimide fabric laminates is compared in terms of the corresponding fracture parameters and the shape and the location of the voids.

TL;DR: In this paper, the authors presented a method of extracting the damage size and position for highly orthotropic (unidirectional) carbon fiber-reinforced polymer (CFRP) composites.

TL;DR: A continuum damage-mechanics (CDM) model for fabric-reinforced composites is developed as a framework within which both in-ply and delamination failure may be modelled during impact loading.

TL;DR: In this paper, both fully soluble and phase-separating epoxy-functionalised hyperbranched polymers were used, the latter showing more efficient toughening properties, but a close control of the phase separation mechanism was required, in order to avoid filtering effects before or during fibre impregnation.

TL;DR: In this paper, the post-fabrication FBG spectra were studied to examine the influence of manufacturing variables (such as composite stacking sequence and resin flow during processing) on the final profile of the spectrum and the functionality of the sensor.

TL;DR: In this article, the possibility of detecting in-situ damage in carbon-fibre-reinforced polymers (CFRP) by the use of DC or AC electrical property measurements is discussed.

TL;DR: In this article, the effects of volume fraction, Al 2 O 3 particle size and porosity in the composites on the abrasive wear resistance of compo-casting Al alloy MMCs have been studied for different abrasive conditions.

TL;DR: In this article, an overview on investigations and possible applications of electrical methods for in situ stress and strain detection, together with health monitoring, would give improved durability and safety of composite structures.

TL;DR: A digital-element model developed to simulate textile processes and determine the micro-geometry of textile fabrics is established, which is advantageous for other textile processes, such as twisting, weaving and knitting and for the investigation of textile preform deformation during the consolidation process.

TL;DR: In this paper, the authors present eddy-current methods for non-destructive testing and characterisation of CFRP, which can be used to evaluate both the structure and the flaws.

TL;DR: In this paper, the authors investigated the mechanical properties of a three-phase viscoelastic composite by using two micromechanical models: the original Mori-Tanaka (MT) method and an extension of the MT solution to treat fibers with interphase regions.

TL;DR: In this paper, the rate-dependent non-linear behavior of two polymeric composite material systems, the unidirectional S2-glass/8553-40 and the woven 7781/Fl55 E-glass fabric in the range of 0.0001 to 1/s under monotonic and proportional loading situations was investigated.

TL;DR: In this article, the damage mesomodel for laminates is revisited, considering the numerous pieces of work, both experimental and theoretical, that have been carried out in micromechanics.

TL;DR: In this paper, the authors present a model of fracture statistics for brittle-matrix composites and the resulting model of mechanical behavior requires a limited number of parameters which consist in intrinsic constituent properties including elastic properties and flaw strength parameters.

TL;DR: In this article, the electrical conductivity of carbon-fibre-reinforced polypropylene/polyaniline-complex blends was investigated. And a correlation between electrical conductivities and the microstructure of both the blends and the composites was found; the fibre concentration, orientation and average length affected the conductivity.

TL;DR: In this article, a mixture of polyimide/montmorillonite nanocomposites were prepared from solution of poly(amic acid) precursors and the dodecyl-montmoroniite (DMONT) using N-methyl-2-pyrrolidone as a solvent.

TL;DR: In this article, a 3D shear-lag model was proposed to simulate the mechanical behavior of unidirectional composites based on a three-dimensional (3D) shearlag model.

TL;DR: In this paper, the interrelationship between the permeability and capillary pressure in in-plane infiltration of assemblies of woven fabrics was investigated and it was shown that the higher the injection pressure, the lower the associated error of not including Pc into the estimation of permeability calculation.

TL;DR: In this article, an improved method for obtaining the micromechanical parameters, interfacial shear strength, fibre orientation factor, and fibre stress at composite failure using input data from macromachanical tests is presented.

TL;DR: In this paper, two series of zirconia-hydroxyapatite composites, Z4H6 and Z6H4 with 40 and 60 vol.% of the ZIRconia content respectively, were prepared by powder uniaxial pressing at 700 MPa and sintering in air at 1200-1500°C for 3 h.

TL;DR: In this article, an almost linear dependence of the Vickers hardness on the SiC volume content in the broad range from 7 to 45% was found, and it was shown that the elastic modulus derived from the universal hardness measurements can be successfully used for studying the trend of the elastic properties in functionally graded materials.