Applying Acoustic Emission Technique for Detecting Various Damages Occurred in PCL Nanomodified Composite Laminates
Interleaving composite laminates by nanofibers is a well-known method of increasing interlaminar fracture toughness. Among many possibilities, polycaprolactone (PCL) nanofibers is one of the best choices for toughening composite laminates. The influence of PCL on delamination mode of failure is cons...
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MDPI AG
2021
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oai:doaj.org-article:02c1683aa6e743d18d6e9a37b923a15a2021-11-11T18:43:44ZApplying Acoustic Emission Technique for Detecting Various Damages Occurred in PCL Nanomodified Composite Laminates10.3390/polym132136802073-4360https://doaj.org/article/02c1683aa6e743d18d6e9a37b923a15a2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3680https://doaj.org/toc/2073-4360Interleaving composite laminates by nanofibers is a well-known method of increasing interlaminar fracture toughness. Among many possibilities, polycaprolactone (PCL) nanofibers is one of the best choices for toughening composite laminates. The influence of PCL on delamination mode of failure is considered before. However, the effect of PCL on other damage modes, such as fiber breakage and matrix cracking, is yet to be studied. In this study, the acoustic emission (AE) technique is applied to determine the effect of toughening composite laminates by PCL nanofibers on matrix cracking, fiber/matrix debonding, and fiber breakage failure mechanisms. For this purpose, mode I and mode II fracture tests are conducted on modified and non-modified glass/epoxy laminates. Three different methods, i.e., peak frequency, wavelet transform, and sentry function, are utilized for analyzing the recorded AE data from mode I test. The results show that applying PCL nanofibers not only increases the mode I critical strain energy release rate by about 38%, but also decreases different failure mechanisms by between 75 and 94%.Ali GholizadehHasan MansouriAli NikbakhtHamed SaghafiMohamad FotouhiMDPI AGarticlecomposite laminatesPCL nanofibersfracture testacoustic emission techniqueOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3680, p 3680 (2021) |
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composite laminates PCL nanofibers fracture test acoustic emission technique Organic chemistry QD241-441 |
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composite laminates PCL nanofibers fracture test acoustic emission technique Organic chemistry QD241-441 Ali Gholizadeh Hasan Mansouri Ali Nikbakht Hamed Saghafi Mohamad Fotouhi Applying Acoustic Emission Technique for Detecting Various Damages Occurred in PCL Nanomodified Composite Laminates |
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Interleaving composite laminates by nanofibers is a well-known method of increasing interlaminar fracture toughness. Among many possibilities, polycaprolactone (PCL) nanofibers is one of the best choices for toughening composite laminates. The influence of PCL on delamination mode of failure is considered before. However, the effect of PCL on other damage modes, such as fiber breakage and matrix cracking, is yet to be studied. In this study, the acoustic emission (AE) technique is applied to determine the effect of toughening composite laminates by PCL nanofibers on matrix cracking, fiber/matrix debonding, and fiber breakage failure mechanisms. For this purpose, mode I and mode II fracture tests are conducted on modified and non-modified glass/epoxy laminates. Three different methods, i.e., peak frequency, wavelet transform, and sentry function, are utilized for analyzing the recorded AE data from mode I test. The results show that applying PCL nanofibers not only increases the mode I critical strain energy release rate by about 38%, but also decreases different failure mechanisms by between 75 and 94%. |
format |
article |
author |
Ali Gholizadeh Hasan Mansouri Ali Nikbakht Hamed Saghafi Mohamad Fotouhi |
author_facet |
Ali Gholizadeh Hasan Mansouri Ali Nikbakht Hamed Saghafi Mohamad Fotouhi |
author_sort |
Ali Gholizadeh |
title |
Applying Acoustic Emission Technique for Detecting Various Damages Occurred in PCL Nanomodified Composite Laminates |
title_short |
Applying Acoustic Emission Technique for Detecting Various Damages Occurred in PCL Nanomodified Composite Laminates |
title_full |
Applying Acoustic Emission Technique for Detecting Various Damages Occurred in PCL Nanomodified Composite Laminates |
title_fullStr |
Applying Acoustic Emission Technique for Detecting Various Damages Occurred in PCL Nanomodified Composite Laminates |
title_full_unstemmed |
Applying Acoustic Emission Technique for Detecting Various Damages Occurred in PCL Nanomodified Composite Laminates |
title_sort |
applying acoustic emission technique for detecting various damages occurred in pcl nanomodified composite laminates |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doaj.org/article/02c1683aa6e743d18d6e9a37b923a15a |
work_keys_str_mv |
AT aligholizadeh applyingacousticemissiontechniquefordetectingvariousdamagesoccurredinpclnanomodifiedcompositelaminates AT hasanmansouri applyingacousticemissiontechniquefordetectingvariousdamagesoccurredinpclnanomodifiedcompositelaminates AT alinikbakht applyingacousticemissiontechniquefordetectingvariousdamagesoccurredinpclnanomodifiedcompositelaminates AT hamedsaghafi applyingacousticemissiontechniquefordetectingvariousdamagesoccurredinpclnanomodifiedcompositelaminates AT mohamadfotouhi applyingacousticemissiontechniquefordetectingvariousdamagesoccurredinpclnanomodifiedcompositelaminates |
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