This paper presents both theoretical and experimental work on the heating of carbon fiber reinforced plastic (CFRP) by millimeter (mm)-waves. In contrary to the standard methods using autoclaves, samples are cured using a 30 GHz gyrotron furnace. Heating experiments, showing the strong influence of the fiber orientation in the samples on their heating behavior are performed with cured samples i...

The growing use of composite materials for aerospace applications has resulted in the need quantitative methods to analyze components. Ultrasonic guided waves constitute physical approach nondestructive evaluation (NDE) and structural health monitoring (SHM) solid materials, such as carbon fiber reinforced polymer (CFRP) laminates. Ultrasound based NDE are commonly used field, but ultrasonic wa...

A cost-effective approach to improve the physical and mechanical properties of carbon fiber reinforced polymer (CFRP) prepreg composites, where electrospun multiwalled nanotubes (MWCNTs)/epoxy nanofibers were synthesized incorporated in between layers conventional CFRP composite has been presented. MWCNT-aligned epoxy successfully produced by an optimized electrospinning process. Nanofibers dep...

Carbon Fiber Reinforced Polymer (CFRP) is Repair of reinforced concrete structures and both are used for reinforcement One the composite materials. with carbon fibres an advanced non-metal made resin compound, which high strength, Weight loss, itching excessive fatigue It has many excellent performances like resistance. fiber polymer best specific machine properties, so these products High such...

The use of carbon-fibre-reinforced polymers (CFRP) laminates in structural applications where high strength-to-weight and high stiffness-to-weight ratios are required is wellestablished. However, because of structural distortions induced by moisture absorption effects, polymer matrix composites are not yet definitely considered suitable candidate for ultra-high precision engineering application...

The present study examines the shear performance and modes of failure of rectangular simply supported reinforced concrete (RC) beams designed with shear deficiencies. These members were strengthened with externally bonded carbon fiber reinforced polymer (CFRP) sheets and evaluated in the laboratory. The experimental program consisted of twelve full-scale RC beams tested to fail in shear. The va...

This paper presents a fatigue assessment model that was developed for corroded reinforced concrete (RC) beams strengthened using prestressed carbon fiber-reinforced polymer (CFRP) sheets. The proposed model considers the fatigue properties of the constituent materials as well as the section equilibrium. The model provides a rational approach that can be used to explicitly assess the failure mod...

This study presents the shear performance and the modes of failure of reinforced concrete (RC) beams strengthened with externally bonded carbon fiber reinforced polymer (CFRP) wraps. The experimental program consisted of testing twenty-seven, full-scale, RC beams. The variables investigated in this research study included steel stirrups (i.e., beams with and without steel stirrups), shear span-...

This paper presents a data fusion method between the results of ultrasound using phased array at 5MHz frequency and those obtained through eddy current examination at 1-10MH frequency. The obtained results are compared with destructive tests, a very good correlation being obtained. The effects of delamination over the properties of CFRP are studied using dynamic mechanical analyzer, emphasizing...

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