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

Bogenfeld, Raffael Marius and Gorsky, Christopher (2021) An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites. Journal of Composites Science, 5 (11), p. 296. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/jcs5110296. ISSN 2504-477X.

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Official URL: https://www.mdpi.com/2504-477X/5/11/296

Abstract

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.

Item URL in elib:https://elib.dlr.de/145464/
Document Type:Article
Title:An Experimental Study of the Cyclic Compression after Impact Behavior of CFRP Composites
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bogenfeld, Raffael MariusRaffael.Bogenfeld (at) dlr.dehttps://orcid.org/0000-0003-3883-269X
Gorsky, ChristopherChristopher.Gorsky (at) dlr.deUNSPECIFIED
Date:10 November 2021
Journal or Publication Title:Journal of Composites Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:5
DOI :10.3390/jcs5110296
Page Range:p. 296
Editors:
EditorsEmailEditor's ORCID iD
Tornabene, Francescofrancesco.tornabene@unisalento.it0000-0002-5968-3382
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Series Name:Carbon Fiber Composites
ISSN:2504-477X
Status:Published
Keywords:damage tolerance; delamination; damage growth; impact; fatigue; fatigue after impact
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design, L - Advanced Materials and New Manufacturing Technologies
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Bogenfeld, Raffael Marius
Deposited On:15 Nov 2021 08:05
Last Modified:19 Nov 2021 20:39

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