An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites

The behavior of impact damaged composite laminates under cyclic load is crucial to achieve a damage tolerant design of composite structures. A sufficient residual strength has to be ensured throughout the entire structural service life. In this study, a set of 27 impacted coupon specimens is subject...

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Autores principales:	Raffael Bogenfeld, Christopher Gorsky
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	damage tolerance delamination damage growth impact fatigue fatigue after impact Technology T Science Q
Acceso en línea:	https://doaj.org/article/903ac11546c942c091b96fbcb755b547
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spelling	oai:doaj.org-article:903ac11546c942c091b96fbcb755b5472021-11-25T18:03:14ZAn Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites10.3390/jcs51102962504-477Xhttps://doaj.org/article/903ac11546c942c091b96fbcb755b5472021-11-01T00:00:00Zhttps://www.mdpi.com/2504-477X/5/11/296https://doaj.org/toc/2504-477XThe behavior of impact damaged composite laminates under cyclic load is crucial to achieve a damage tolerant design of composite structures. A sufficient residual strength has to be ensured throughout the entire structural service life. In this study, a set of 27 impacted coupon specimens is subjected to quasi-static and cyclic compression load. After long intervals without detectable damage growth, the specimens fail through the sudden lateral propagation of delamination and fiber kink bands within few load cycles. Ultrasonic inspections were used to reveal the damage size after certain cycle intervals. Through continuous dent depth measurements during the cyclic tests, the evolution of the dent visibility was monitored. These measurements revealed a relaxation of the indentation of up to 90% before ultimate failure occurs. Due to the distinct relaxation and the short growth interval before ultimate failure, this study confirms the no-growth design approach as the preferred method to account for the damage tolerance of stiffened, compression-loaded composite laminates.Raffael BogenfeldChristopher GorskyMDPI AGarticledamage tolerancedelaminationdamage growthimpactfatiguefatigue after impactTechnologyTScienceQENJournal of Composites Science, Vol 5, Iss 296, p 296 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	damage tolerance delamination damage growth impact fatigue fatigue after impact Technology T Science Q
spellingShingle	damage tolerance delamination damage growth impact fatigue fatigue after impact Technology T Science Q Raffael Bogenfeld Christopher Gorsky An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites
description	The behavior of impact damaged composite laminates under cyclic load is crucial to achieve a damage tolerant design of composite structures. A sufficient residual strength has to be ensured throughout the entire structural service life. In this study, a set of 27 impacted coupon specimens is subjected to quasi-static and cyclic compression load. After long intervals without detectable damage growth, the specimens fail through the sudden lateral propagation of delamination and fiber kink bands within few load cycles. Ultrasonic inspections were used to reveal the damage size after certain cycle intervals. Through continuous dent depth measurements during the cyclic tests, the evolution of the dent visibility was monitored. These measurements revealed a relaxation of the indentation of up to 90% before ultimate failure occurs. Due to the distinct relaxation and the short growth interval before ultimate failure, this study confirms the no-growth design approach as the preferred method to account for the damage tolerance of stiffened, compression-loaded composite laminates.
format	article
author	Raffael Bogenfeld Christopher Gorsky
author_facet	Raffael Bogenfeld Christopher Gorsky
author_sort	Raffael Bogenfeld
title	An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites
title_short	An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites
title_full	An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites
title_fullStr	An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites
title_full_unstemmed	An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites
title_sort	experimental study of the cyclic compression after impact behavior of cfrp composites
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/903ac11546c942c091b96fbcb755b547
work_keys_str_mv	AT raffaelbogenfeld anexperimentalstudyofthecycliccompressionafterimpactbehaviorofcfrpcomposites AT christophergorsky anexperimentalstudyofthecycliccompressionafterimpactbehaviorofcfrpcomposites AT raffaelbogenfeld experimentalstudyofthecycliccompressionafterimpactbehaviorofcfrpcomposites AT christophergorsky experimentalstudyofthecycliccompressionafterimpactbehaviorofcfrpcomposites
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An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites

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