scholarly journals Fatigue life prediction of unidirectional carbon fiber/epoxy composite on Mars

2017 ◽  
Vol 8 (8) ◽  
pp. 74-100 ◽  
Author(s):  
Anvari A.
Keyword(s):  
Fatigue Life ◽  
Carbon Fiber ◽  
Life Prediction ◽  
Epoxy Composite ◽  
Fatigue Life Prediction ◽  
Carbon Fiber Epoxy

scholarly journals Fatigue Life Prediction of Reinforced Concrete Beams Strengthened with CFRP: Study Based on an Accumulative Damage Model

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 130 ◽  
Author(s):  
Xin-Yan Guo ◽  
Yi-Lin Wang ◽  
Pei-Yan Huang ◽  
Xiao-Hong Zheng ◽  
Yi Yang
Keyword(s):  
Reinforced Concrete ◽  
Fatigue Life ◽  
Carbon Fiber ◽  
Prediction Model ◽  
Life Prediction ◽  
Damage Model ◽  
Fatigue Life Prediction ◽  
Rc Beams ◽  
Rc Structures ◽  
Life Prediction Model

With the prestressed carbon fiber reinforced polymer (CFRP) strengthening technique widely used in reinforced concrete (RC) structures, it is more and more important to study the fatigue performance of RC structures. Since the fracture of a tensile steel bar at the main cracked section is the leading reason for the failure of RC beams reinforced by prestressed CFRP, a fatigue life prediction model of RC beams reinforced by prestressed CFRP was developed based on an accumulative damage model. Moreover, gradual degradation of the performance of the concrete was considered in the fatigue life prediction model. An experimental study was also conducted to research the fatigue behavior of RC beams reinforced by prestressed or non-prestressed carbon fiber laminate (CFL). During the tests, fatigue crack patterns were captured using a digital image correlation (DIC) technique, and the fatigue lives of a total of 30 beams were recorded. The results showed that the predicted main crack propagation curves and the fatigue lives were close to the experimental data. This study also exhibited that the prestressed CFRP could reduce the stress of main steel bars in RC beams and effectively improve the fatigue performance of the RC beams.

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