With the increasing applications of laminated composites in all kinds of industries, it becomes imperative to detect delamination, a frequently occurring damage which causes substantial stiffness loss in composite structures. This paper presents an approach to assess delaminations (in terms of their size, in-plane location and interface) in fibre reinforced laminated composite plates using natu...

Abstract In dentistry, the use of dental fillings is a routine procedure. The cheap, simple and low-harm operation, however, filling deep cavities difficult task. During this research, three types were tested: composite bonded directly to cavity walls, walls with semi-direct method, lined polyethylene fibres. course our examinations, gaps between wall observed using scanning electron microscopy...

Within the last decades many approaches have been proposed to perform source identification in fibre reinforced composites. Some of them have been validated using skilled micromechanical experiments or by using reference specimens in combination with imaging methods, leaving strong evidence that these approaches are valid tools to perform source identification tasks. Lately, also numerical meth...

2010 KTH accounts for one-third of Sweden's technical research and engineering education capacity at university level. Education and research cover a broad spectrum – from natural sciences to all the branches of engineering. Part of this work was performed a Innventia AB. Innventia AB is a world leader in research and development relating to pulp, paper, graphic media, packaging and biorefining...

A model of fractional-order of thermoelasticity is applied to study a 2D problem of mode-I crack in a fibre-reinforced thermal environment. The crack is under prescribed distributions of heat and pressure. The normal mode analysis is applied to deduce exact formulae for displacements, stresses, and temperature. Variations of field quantities with the axial direction are illustrated graphically....

This paper in essence presents comparative experimental data on the mechanical performance of steel and synthetic fibre-reinforced concrete under compression, tensile split and flexure. URW1050 steel fibre and HPP45 synthetic fibre, both with the same concrete design mix, have been used to make cube specimens for a compression test, cylinders for a tensile split test and beam specimens for a fl...

In recent years, many studies have focused on the mix-design and characterization of cementitious composites reinforced with plant fibres. It appears that in fresh state, morphology hydrophilic nature these fibres significantly affect rheology material. hardened mechanical performances are lower than standard (glass, synthetic, etc.). These poor mainly due to weak neo-formed fibre/matrix interf...

This paper investigates the effects of unequal compressive and tensile moduli of carbon fibre reinforced plastic (CFRP) composites. The basic assumption is based on the statistics that the compressive modulus is a fraction lower than the tensile modulus. Data evaluated by Finite Element Analysis (FEA) model, Classical Laminate Theory (CLT) model, and experiment are used to investigate these eff...

Research reported in this paper was carried to study the water permeability of steel fibre reinforced concrete (SFRC) with varied aspect ratios of steel fibres. Corrugated steel fibres were used in the investigation at constant fibre content of 0.5%. Relationship of water permeability with compressive strength and split tensile strengths has been presented. The water permeability was observed t...