Crack propagation could be catastrophic, and it needs the urgent attention of user. A cracked structure to repaired or replaced at earliest. Costs associated with complete replacement part paves way for former option, especially in aircraft industry. Composite materials have good directional properties strength toughness compared conventional like metals, alloys plastics. In this study carbon f...

In this study, experimental work was carried out on reinforced concrete (RC) beams strengthened with carbon fiber polymers (CFRP) plates. This study aims to examine the effect of reinforcement ratio flexural behavior these and propose a new model for predicting debonding moment. Six RC consisting three control CFRP plates were tested. The simply supported loaded four-point bending. test variabl...

This paper presents results of testing eccentrically loaded columns externally wrapped with two types of materials. Six cylindrical (205 mm diameter and 925 mm height) plain columns were cast and tested. Half of the columns were wrapped with GFRP and the other half with CFRP. All columns were tested by applying an axial load at 50 mm eccentricity. In each group (GFRP or CFRP wrapped) of columns...

Carbon fibre reinforced polymer (CFRP) structures are widely used in the aerospace industry for their low weight and strong mechanical properties. However, they prone to impact damage due brittle nature. Edge Illumination X-ray Phase Contrast imaging (EI XPCi), a novel, phase-based technique, was compared against two established non-destructive evaluation methods detection CFRP plates. Planar E...

This research program is intended to verify the influence of using distributed external U-wrap CFRP anchorage to shift the failure mode from overall debonding to sectional flexural failure for concrete beams externally bonded with CFRP sheets. Premature cover delamination and FRP debonding are predominant failure modes in FRP flexural strengthening that may be delayed or prevented by using FRP ...

The paper presents the Lamb wave attenuation of Carbon Fiber Reinforced Plastic (CFRP) plates on the basis of an experimental transmitter-sensor scheme. We measured separately the S0 and A0 Lamb modes of CFRP plates with three different kind of laminate lay-ups; unidirectional [0]8s (and [90]8s), cross-ply [0, 90]4s, and quasi-isotropic [0,45,-45,90]2s. Several ultrasound transmitters were used...

The strengthening and repair of existing structures using bonded carbon fiber reinforced polymer, CFRP, laminates has attracted a great deal of attention in the past two decades. Investigations clearly indicate the great potential of this method for restoring the capacity of corroded steel beams and improving their fatigue life. One important issue regarding the use of this technique in strengt...

One issue to consider while designing and constructing steel girders reinforced with carbon fiber-reinforced polymer (CFRP) plates in bridges is debonding failure. Previous studies showed that the parameters such as characteristics of material, load, adhesive, CFRP have an effect on failure probability girder, which represented by reliability index. Therefore, this study analyzes indices streng...

Abstract Carbon fiber reinforced plastic (CFRP) laminates are often used in a quasi-isotropic manner, such as cross-ply lamination; thus, the mechanical properties of CFRP cannot be fully exploited. In this study, we proposed carbon design method, which uses orientation and thickness lamination parameters, where is determined using principal stress direction by iterative calculations maximum th...

The behavior of hollow-core columns composed reactive powder concrete (RPC) contained by a circular carbon fiber reinforced polymer (CFRP) tube is investigated numerically in this work. This research used hollow core column samples with an outside diameter 20.6 cm, interior 9cm, and height 80cm. These examples have been created utilizing 116 MPa concrete. Nine groupings specimens were created. ...