Carbon fiber reinforced Composite structures posses‟ high strength and stiffness to weight ratios, also exhibits good fatigue resistance, and are less prone to deterioration caused by corrosion and cracking. Fabrication of these composite structures is highly process dependent. During curing process, the physical, mechanical and chemical properties are imparted to the components, and are genera...

The object of the present work is the development and application of a quite general approach to optimal design of composite laminates where elastic symmetries can also be explicitly expressed as criteria of the optimisation process. Our formulation is in the form of a highly non linear and non convex singleor multi-objective optimisation problem subject to equality and inequality constraints. ...

The effect of using thin plies to increase the bearing strength composite laminates has been investigated. A series 5 theoretically identical stiffness with varying proportions were manufactured a single material system. Four specimens from each plate tested for and damage was subsequently characterized an optical microscope. results show that performance in terms stiffness, at onset damage, ul...

The stiffness and reduced weight of polymer composites makes them unique from conventional manufacturing materials. failure modes can vary tension to compression dominated with the matrix interface. mechanical strength be improved stacking different laminates for development hybrid composites. This study highlights fabrication laminate composite flexural tests analysis sequences carbon (C) glas...

Externally bonded carbon fiber reinforced polymer (CFRP) laminates are a feasible and economical alternative to traditional methods for strengthening and stiffening deficient reinforced concrete and prestressed concrete girders as shown in Fig. (1). Although extensive research has already been undertaken to investigate the behavior of CFRP strengthened bridge girders, the majority of work condu...

A multi-scale method to predict the stiffness and stability properties of carbon nanotube-reinforced laminates has been developed. This method is used in the prediction of the buckling behavior of laminated carbon nanotube-polyethylene composites formed by stacking layers of carbon nanotube-reinforced polymer with the nanotube alignment axes of each layer oriented in different directions. Linki...

In recent years, ultrasonic methods have been developed that can be used to measure the mechanical stiffness of materials.1-5 In one such method, the velocity of a flexural plate wave, the lowest order antisymmetric Lamb mode, is measured as a function of frequency. Lamb waves arise from a coupling at the free boundaries between the shear waves and compressional waves in a plate structure.6 The...

This article features a large statistical database on the tensile properties of natural fibre reinforced composite laminates. The data presented here corresponds to a comprehensive experimental testing program of several composite systems including: different material constituents (epoxy and vinyl ester resins; flax, jute and carbon fibres), different fibre configurations (short-fibre mats, uni...

In this paper, a real-time composite fatigue life prognosis framework is proposed. The proposed methodology combines Bayesian inference, piezoelectric sensor measurements, and a mechanical stiffness degradation model for in-situ fatigue life prediction. First, the composites stiffness degradation is introduced to account for the composites fatigue damage accumulation under cyclic loadings and a...