In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension
In this study, conductive carbon nanofibers (CNFs) were dispersed into epoxy resin and then infused into glass fiber fabric to fabricate CNF/glass fiber-reinforced polymer (GFRP) laminates. The electrical resistance and strain of CNF/GFRP laminates were measured simultaneously during tensile loading...
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MDPI AG
2018-07-01
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Series: | Polymers |
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Online Access: | http://www.mdpi.com/2073-4360/10/7/777 |
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author | Yanlei Wang Yongshuai Wang Baoguo Han Baolin Wan Gaochuang Cai Ruijuan Chang |
author_facet | Yanlei Wang Yongshuai Wang Baoguo Han Baolin Wan Gaochuang Cai Ruijuan Chang |
author_sort | Yanlei Wang |
collection | DOAJ |
description | In this study, conductive carbon nanofibers (CNFs) were dispersed into epoxy resin and then infused into glass fiber fabric to fabricate CNF/glass fiber-reinforced polymer (GFRP) laminates. The electrical resistance and strain of CNF/GFRP laminates were measured simultaneously during tensile loadings to investigate the in situ strain and damage monitoring capability of CNF/GFRP laminates. The damage evolution and conduction mechanisms of the laminates were also presented. The results indicated that the percolation threshold of CNFs content for CNF/GFRP laminates was 0.86 wt % based on a typical power law. The resistance response during monotonic tensile loading could be classified into three stages corresponding to different damage mechanisms, which demonstrated a good ability of in situ damage monitoring of the CNF/GFRP laminates. In addition, the capacity of in situ strain monitoring of the laminates during small strain stages was also confirmed according to the synchronous and reversible resistance responses to strain under constant cyclic tensile loading. Moreover, the analysis of the resistance responses during incremental amplitude cyclic tensile loading with the maximum strain of 1.5% suggested that in situ strain and damage monitoring of the CNF/GFRP laminates were feasible and stable. |
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institution | Directory Open Access Journal |
issn | 2073-4360 |
language | English |
last_indexed | 2024-04-13T02:13:28Z |
publishDate | 2018-07-01 |
publisher | MDPI AG |
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series | Polymers |
spelling | doaj.art-3d67e1744b6c47eaaa22ccfa82a924ac2022-12-22T03:07:13ZengMDPI AGPolymers2073-43602018-07-0110777710.3390/polym10070777polym10070777In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under TensionYanlei Wang0Yongshuai Wang1Baoguo Han2Baolin Wan3Gaochuang Cai4Ruijuan Chang5State Key Laboratory of Coastal and Offshore Engineering, School of Civil Engineering, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of Coastal and Offshore Engineering, School of Civil Engineering, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of Coastal and Offshore Engineering, School of Civil Engineering, Dalian University of Technology, Dalian 116024, ChinaDepartment of Civil, Construction and Environmental Engineering, Marquette University, Milwaukee, WI 53201, USALaboratory of Solid Structures, University of Luxembourg, L1359 Luxembourg, LuxembourgState Key Laboratory of Coastal and Offshore Engineering, School of Civil Engineering, Dalian University of Technology, Dalian 116024, ChinaIn this study, conductive carbon nanofibers (CNFs) were dispersed into epoxy resin and then infused into glass fiber fabric to fabricate CNF/glass fiber-reinforced polymer (GFRP) laminates. The electrical resistance and strain of CNF/GFRP laminates were measured simultaneously during tensile loadings to investigate the in situ strain and damage monitoring capability of CNF/GFRP laminates. The damage evolution and conduction mechanisms of the laminates were also presented. The results indicated that the percolation threshold of CNFs content for CNF/GFRP laminates was 0.86 wt % based on a typical power law. The resistance response during monotonic tensile loading could be classified into three stages corresponding to different damage mechanisms, which demonstrated a good ability of in situ damage monitoring of the CNF/GFRP laminates. In addition, the capacity of in situ strain monitoring of the laminates during small strain stages was also confirmed according to the synchronous and reversible resistance responses to strain under constant cyclic tensile loading. Moreover, the analysis of the resistance responses during incremental amplitude cyclic tensile loading with the maximum strain of 1.5% suggested that in situ strain and damage monitoring of the CNF/GFRP laminates were feasible and stable.http://www.mdpi.com/2073-4360/10/7/777glass fiber-reinforced polymer (GFRP)carbon nanofibers (CNFs)damagestrainmonitoring |
spellingShingle | Yanlei Wang Yongshuai Wang Baoguo Han Baolin Wan Gaochuang Cai Ruijuan Chang In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension Polymers glass fiber-reinforced polymer (GFRP) carbon nanofibers (CNFs) damage strain monitoring |
title | In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension |
title_full | In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension |
title_fullStr | In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension |
title_full_unstemmed | In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension |
title_short | In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension |
title_sort | in situ strain and damage monitoring of gfrp laminates incorporating carbon nanofibers under tension |
topic | glass fiber-reinforced polymer (GFRP) carbon nanofibers (CNFs) damage strain monitoring |
url | http://www.mdpi.com/2073-4360/10/7/777 |
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