scholarly journals Fretting Fatigue Behaviour of Pin-Loaded Thermoset Carbon-Fibre-Reinforced Polymer (CFRP) Straps

Polymers ◽  
2016 ◽  
Vol 8 (4) ◽  
pp. 124 ◽  
Author(s):  
Fabio Baschnagel ◽  
Vanessa Rohr ◽  
Giovanni Terrasi
Keyword(s):  
Carbon Fibre ◽  
Fatigue Behaviour ◽  
Fretting Fatigue ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

Fatigue behaviour of cracked steel beams retrofitted with carbon fibre–reinforced polymer laminates

2017 ◽  
Vol 21 (8) ◽  
pp. 1148-1161 ◽  
Author(s):  
Qian-Qian Yu ◽  
Yu-Fei Wu
Keyword(s):  
Carbon Fibre ◽  
Fatigue Behaviour ◽  
Interfacial Debonding ◽  
Experimental Program ◽  
Steel Beams ◽  
Special Focus ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Polymer Laminates

In recent years, externally bonded carbon fibre–reinforced polymer has been considered an innovative way to strengthen steel structures attributed to its high strength-to-weight ratio, excellent corrosion resistance and fatigue performance. This article presents an experimental and numerical study on the fatigue behaviour of defected steel beams strengthened with carbon fibre–reinforced polymer laminates, with a special focus on the effect of interfacial debonding. Analytical modelling and numerical simulation confirmed that the interfacial debonding had a pronounced effect on carbon fibre–reinforced polymer strain and stress intensity factor at the crack front. After introducing interfacial debonding from experimental findings into the numerical analysis, the fatigue life and crack propagation versus cycle numbers of the specimens compared well with the test results. Based on the current experimental program, specimens with Sikadur 30 were more prone to debonding failure; therefore, Araldite 420 is suggested for strengthening schemes.

scholarly journals Fretting Fatigue Performance of Unidirectional, Laminated Carbon Fibre Reinforced Polymer Straps at Elevated Service Temperature

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3437
Author(s):  
Danijela Stankovic ◽  
Luke A. Bisby ◽  
Zafiris Triantafyllidis ◽  
Giovanni P. Terrasi
Keyword(s):  
Carbon Fibre ◽  
Ambient Temperature ◽  
Fretting Fatigue ◽  
Fatigue Performance ◽  
Service Temperature ◽  
Thermal Tests ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Static Tensile ◽  
Fibre Reinforced Polymer

The fretting fatigue performance of laminated, unidirectional (UD), pin-loaded, carbon fibre-reinforced polymer (CFRP) straps that can be used as bridge hanger cables was investigated at a sustained service temperature of 60 °C. The aim of this paper is to elucidate the influence of the slightly elevated service temperature on the tensile fatigue performance of CFRP straps. First, steady state thermal tests at ambient temperature and at 60 °C are presented, in order to establish the behaviour of the straps at these temperatures. These results indicated that the static tensile performance of the straps is not affected by the increase in temperature. Subsequently, nine upper stress levels (USLs) between 650 and 1400 MPa were chosen in order to establish the S–N curve at 60 °C (frequency 10 Hz; R = 0.1) and a comparison with an existing S–N curve at ambient temperature was made. In general, the straps fatigue limit was slightly decreased by temperature, up to 750 MPa USL, while, for the higher USLs, the straps performed slightly better as compared with the S–N curve at ambient temperature.

Fatigue behaviour of concrete beams post-tensioned with unbonded carbon fibre reinforced polymer tendons

2006 ◽  
Vol 33 (9) ◽  
pp. 1140-1155 ◽  
Author(s):  
Abass Braimah ◽  
Mark F Green ◽  
T Ivan Campbell
Keyword(s):  
Carbon Fibre ◽  
Concrete Beams ◽  
Fatigue Behaviour ◽  
Reinforced Concrete Beams ◽  
Premature Failure ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Prestressing Strands ◽  
Post Tensioned

Much research has been conducted in the past decade to evaluate the suitability of fibre reinforced polymer (FRP) reinforcement in concrete structures. Most of the research has concentrated on the short-term performance of FRP prestressed and reinforced concrete beams. Only a limited amount of research has considered the fatigue behaviour of FRP prestressed beams. This paper presents an experimental research program designed to examine the fatigue behaviour of unbonded carbon fibre reinforced polymer (CFRP) post-tensioned concrete beams. The fatigue test program consisted of five large-scale (4.0 m span) concrete T-beams. Three of the beams were post-tensioned with CFRP tendons, and the remaining two beams were post-tensioned with steel prestressing strands. The fatigue load limits were chosen to produce an additional stress range of about 100 MPa in the lower prestressing reinforcement. During fatigue testing, some of the prestressing strands fractured at the anchor location. In the steel post-tensioned beams, fracture of wires in the seven-wire prestressing strands did not result in total failure of the steel post-tensioned beams, as the unbroken wires continued to carry prestress force. In the CFRP post-tensioned beams, however, fracture led to splintering of the tendon between the anchors and total loss of prestress force. In general, the CFRP post-tensioned beams performed satisfactorily in fatigue, in comparison with the steel post-tensioned beams, as long as premature failure of the tendons near the anchor location was prevented.Key words: fibre reinforced polymer (FRP), anchorage, tendon, fatigue, post-tension, concrete, beam, dynamic, testing.

Influence of Ply Stacking Sequences on the Impact Response of Carbon Fibre Reinforced Polymer Composite Laminates

2019 ◽  
Author(s):  
Kristian Gjerrestad Andersen ◽  
Gbanaibolou Jombo ◽  
Sikiru Oluwarotimi Ismail ◽  
Segun Adeyemi ◽  
Rajini N ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Polymer Composite ◽  
Composite Laminates ◽  
Impact Response ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
The Impact
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