Experimental and Analytical Study on Residual Stiffness/Strength of CFRP Tendons under Cyclic Loading

Based on tension–tension fatigue tests, this paper investigated the mechanical property degradation of carbon fiber reinforced polymer (CFRP) tendons from a macroscopic perspective. According to the degradation regularity, this paper proposed a normalized phenomenological fatigue model based on the...

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Main Authors: Chao Wang, Jiwen Zhang
Format: Article
Language:English
Published: MDPI AG 2020-12-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/13/24/5653
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spelling doaj-26ba4ecae8174dc2b37e68457e46f1552020-12-12T00:02:24ZengMDPI AGMaterials1996-19442020-12-01135653565310.3390/ma13245653Experimental and Analytical Study on Residual Stiffness/Strength of CFRP Tendons under Cyclic LoadingChao Wang0Jiwen Zhang1School of Civil Engineering, Southeast University, Nanjing 210096, ChinaSchool of Civil Engineering, Southeast University, Nanjing 210096, ChinaBased on tension–tension fatigue tests, this paper investigated the mechanical property degradation of carbon fiber reinforced polymer (CFRP) tendons from a macroscopic perspective. According to the degradation regularity, this paper proposed a normalized phenomenological fatigue model based on the residual stiffness/strength of CFRP tendons during the fatigue loading process. In this paper, the residual stiffness of CFRP tendons were tested at five stress ranges, while the residual strength was tested at four stress ranges. In order to validate the reliability and applicability of proposed fatigue damage model, the predictions of proposed model and cited models from the literature are discussed and compared. Furthermore, experimental results from literatures were adopted to verify the accuracy of the proposed model. The results showed that the proposed model is applicable to predict both residual stiffness and residual strength throughout fatigue life cycle and has a better accuracy than models from the literature. Moreover, the three-stage degradation can be observed from the degradation processes of stiffness and strength at each stress level.https://www.mdpi.com/1996-1944/13/24/5653Carbon Fiber Reinforced Polymer (CFRP) tendonfatigue damage modelresidual stiffnessresidual strengththree-stage degradation
collection DOAJ
language English
format Article
sources DOAJ
author Chao Wang
Jiwen Zhang
spellingShingle Chao Wang
Jiwen Zhang
Experimental and Analytical Study on Residual Stiffness/Strength of CFRP Tendons under Cyclic Loading
Materials
Carbon Fiber Reinforced Polymer (CFRP) tendon
fatigue damage model
residual stiffness
residual strength
three-stage degradation
author_facet Chao Wang
Jiwen Zhang
author_sort Chao Wang
title Experimental and Analytical Study on Residual Stiffness/Strength of CFRP Tendons under Cyclic Loading
title_short Experimental and Analytical Study on Residual Stiffness/Strength of CFRP Tendons under Cyclic Loading
title_full Experimental and Analytical Study on Residual Stiffness/Strength of CFRP Tendons under Cyclic Loading
title_fullStr Experimental and Analytical Study on Residual Stiffness/Strength of CFRP Tendons under Cyclic Loading
title_full_unstemmed Experimental and Analytical Study on Residual Stiffness/Strength of CFRP Tendons under Cyclic Loading
title_sort experimental and analytical study on residual stiffness/strength of cfrp tendons under cyclic loading
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2020-12-01
description Based on tension–tension fatigue tests, this paper investigated the mechanical property degradation of carbon fiber reinforced polymer (CFRP) tendons from a macroscopic perspective. According to the degradation regularity, this paper proposed a normalized phenomenological fatigue model based on the residual stiffness/strength of CFRP tendons during the fatigue loading process. In this paper, the residual stiffness of CFRP tendons were tested at five stress ranges, while the residual strength was tested at four stress ranges. In order to validate the reliability and applicability of proposed fatigue damage model, the predictions of proposed model and cited models from the literature are discussed and compared. Furthermore, experimental results from literatures were adopted to verify the accuracy of the proposed model. The results showed that the proposed model is applicable to predict both residual stiffness and residual strength throughout fatigue life cycle and has a better accuracy than models from the literature. Moreover, the three-stage degradation can be observed from the degradation processes of stiffness and strength at each stress level.
topic Carbon Fiber Reinforced Polymer (CFRP) tendon
fatigue damage model
residual stiffness
residual strength
three-stage degradation
url https://www.mdpi.com/1996-1944/13/24/5653
work_keys_str_mv AT chaowang experimentalandanalyticalstudyonresidualstiffnessstrengthofcfrptendonsundercyclicloading
AT jiwenzhang experimentalandanalyticalstudyonresidualstiffnessstrengthofcfrptendonsundercyclicloading
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