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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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 |
_version_ |
1724385976502976512 |