Evaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods

It is widely known that damage induced by low-velocity impact events will significantly affect the damage tolerance and integrity of composite structures. This study investigates the damage evolution and failure mechanism of impacted laminates under fatigue loadings using the infrared thermography a...

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Autores principales:	Hongliang Tuo, Tao Wu, Zhixian Lu, Xiaoping Ma
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	A Polymer-matrix composites (PMCs) B Fatigue C Damage D Infrared thermography Ultrasonic Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/68ebbe333d9e4138b0c499eee2342fb9
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spelling	oai:doaj.org-article:68ebbe333d9e4138b0c499eee2342fb92021-11-24T04:23:32ZEvaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods0142-941810.1016/j.polymertesting.2020.106869https://doaj.org/article/68ebbe333d9e4138b0c499eee2342fb92021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0142941820320985https://doaj.org/toc/0142-9418It is widely known that damage induced by low-velocity impact events will significantly affect the damage tolerance and integrity of composite structures. This study investigates the damage evolution and failure mechanism of impacted laminates under fatigue loadings using the infrared thermography and ultrasonic methods. Low-velocity impact damage was introduced by a drop weight with a hemispherical impactor, and compression-after-impact (CAI) tests were conducted to determine the residual compressive strength. Four stress levels were selected to conduct compression-compression fatigue tests with a stress ratio R = 10 based on the static CAI strength. During fatigue tests, the surface temperature variations were monitored online by an infrared camera, and the delamination damage evolution was observed using ultrasonic C-scan methods. The thermal images, delamination contours and stiffness degradation were analyzed. The maximum temperature increase and the stiffness degradation show the characteristic with three stages “rapid-slow-rapid”. For evolution of damage area, two stages were observed. The damage area extends from the impact indentation to two outer free edges in the perpendicular direction until the final collapse of the specimen.Hongliang TuoTao WuZhixian LuXiaoping MaElsevierarticleA Polymer-matrix composites (PMCs)B FatigueC DamageD Infrared thermographyUltrasonicPolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 93, Iss , Pp 106869- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	A Polymer-matrix composites (PMCs) B Fatigue C Damage D Infrared thermography Ultrasonic Polymers and polymer manufacture TP1080-1185
spellingShingle	A Polymer-matrix composites (PMCs) B Fatigue C Damage D Infrared thermography Ultrasonic Polymers and polymer manufacture TP1080-1185 Hongliang Tuo Tao Wu Zhixian Lu Xiaoping Ma Evaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods
description	It is widely known that damage induced by low-velocity impact events will significantly affect the damage tolerance and integrity of composite structures. This study investigates the damage evolution and failure mechanism of impacted laminates under fatigue loadings using the infrared thermography and ultrasonic methods. Low-velocity impact damage was introduced by a drop weight with a hemispherical impactor, and compression-after-impact (CAI) tests were conducted to determine the residual compressive strength. Four stress levels were selected to conduct compression-compression fatigue tests with a stress ratio R = 10 based on the static CAI strength. During fatigue tests, the surface temperature variations were monitored online by an infrared camera, and the delamination damage evolution was observed using ultrasonic C-scan methods. The thermal images, delamination contours and stiffness degradation were analyzed. The maximum temperature increase and the stiffness degradation show the characteristic with three stages “rapid-slow-rapid”. For evolution of damage area, two stages were observed. The damage area extends from the impact indentation to two outer free edges in the perpendicular direction until the final collapse of the specimen.
format	article
author	Hongliang Tuo Tao Wu Zhixian Lu Xiaoping Ma
author_facet	Hongliang Tuo Tao Wu Zhixian Lu Xiaoping Ma
author_sort	Hongliang Tuo
title	Evaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods
title_short	Evaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods
title_full	Evaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods
title_fullStr	Evaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods
title_full_unstemmed	Evaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods
title_sort	evaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/68ebbe333d9e4138b0c499eee2342fb9
work_keys_str_mv	AT hongliangtuo evaluationofdamageevolutionofimpactedcompositelaminatesunderfatigueloadingsbyinfraredthermographyandultrasonicmethods AT taowu evaluationofdamageevolutionofimpactedcompositelaminatesunderfatigueloadingsbyinfraredthermographyandultrasonicmethods AT zhixianlu evaluationofdamageevolutionofimpactedcompositelaminatesunderfatigueloadingsbyinfraredthermographyandultrasonicmethods AT xiaopingma evaluationofdamageevolutionofimpactedcompositelaminatesunderfatigueloadingsbyinfraredthermographyandultrasonicmethods
_version_	1718416037667405824

Evaluation of damage evolution of impacted composite laminates under fatigue loadings by infrared thermography and ultrasonic methods

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