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Process Induced Distortions of Composite Structures due to Through- Thickness Fibre Volume Fraction Gradients

Groh, Fabian and Kappel, Erik and Hühne, Christian and Meyer, Florian (2017) Process Induced Distortions of Composite Structures due to Through- Thickness Fibre Volume Fraction Gradients. In: 17th European Conference on Composite Materials. 17th European Conference on Composite Materials, 26.-30. Jun. 2016, München.

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During the production of composite parts unavoidable deformations occur. In order to meet the strict tolerance requirements of industry branches such as the automotive industry it is essential to understand the underlying mechanisms of these deformations. While much research has been done on the anisotropy driven spring-in effect and also on warpage caused by part-tool interactions, there are only a few studies on deformations driven by a fibre volume fraction gradient (Vf-gradient) in the through-thickness direction of a laminate. Especially for large, thin-walled parts with complex geometries, this effect leads to additional unwanted deformations either locally in curved part areas or even on a global level throughout the entire part. A comprehensive experimental study has been performed examining the effect of a Vf-gradient on process induced deformations. L-shaped carbon fibre reinforced, fast curing epoxy resin based specimens are investigated. The occurring deflections are compared with the predictions of an analytical model. The results are relevant for the future development of robust prediction methods for process induced distortions of large, thin-walled composite parts.

Item URL in elib:https://elib.dlr.de/105732/
Document Type:Conference or Workshop Item (Speech)
Title:Process Induced Distortions of Composite Structures due to Through- Thickness Fibre Volume Fraction Gradients
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Groh, Fabianfabian.groh (at) dlr.deUNSPECIFIED
Kappel, Erikerik.kappel (at) dlr.deUNSPECIFIED
Hühne, Christianchristian.huehne (at) dlr.deUNSPECIFIED
Meyer, Florianflorian3.meyer (at) audi.deUNSPECIFIED
Date:June 2017
Journal or Publication Title:17th European Conference on Composite Materials
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:process-induced distortions, fibre volume fraction gradients, automotive, large, thin-walled composites, manufacturing defects
Event Title:17th European Conference on Composite Materials
Event Location:München
Event Type:international Conference
Event Dates:26.-30. Jun. 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC Fahrzeugstruktur (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Groh, Fabian
Deposited On:16 Oct 2016 12:33
Last Modified:31 Jul 2019 20:02

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