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Process distortions in prepreg manufacturing - An experimental study on CFRP L-profiles

Kappel, Erik and Stefaniak, Daniel and Hühne, Christian (2013) Process distortions in prepreg manufacturing - An experimental study on CFRP L-profiles. Composite Structures (106), pp. 615-625. Elsevier. doi: 10.1016/j.compstruct.2013.07.020. ISSN 0263-8223.

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Official URL: http://www.sciencedirect.com/science/article/pii/S0263822313003437


Process distortions are still a challenge in composite manufacturing. In academia and in industry, considerable effort is invested to characterize the main drivers inducing manufacturing distortions. However, due to the variety of different manufacturing techniques, such as resin transfer molding (RTM), resin transfer infusion (RTI) or prepreg processing, universal conclusions are not available yet. This paper focuses on process distortions in prepreg manufacturing using autoclave techniques. A comprehensive experimental study is performed that focuses on essential parameters such as lay-up, part thickness, part radius and scattering of occurring distortions. About 200 L-profile specimens are fabricated on invar and aluminum tools in order to study the effect of the tool material on spring-in. All specimens of this study are made from 8552/AS4 prepreg material. Experimental findings are compared to results published in the literature, while the effect of flange warpage is discussed in detail. Scattering of measured distortions is evaluated, while at least three specimens of each configuration are fabricated.

Item URL in elib:https://elib.dlr.de/98995/
Document Type:Article
Title:Process distortions in prepreg manufacturing - An experimental study on CFRP L-profiles
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kappel, Erikerik.kappel (at) dlr.deUNSPECIFIED
Stefaniak, Danieldaniel.stefaniak (at) dlr.deUNSPECIFIED
Hühne, Christianchristian.huehne (at) dlr.deUNSPECIFIED
Date:December 2013
Journal or Publication Title:Composite Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.compstruct.2013.07.020
Page Range:pp. 615-625
Series Name:Elsevier
Keywords:Layered structures; Thermosetting resin; Process-induced distortions; Spring-in
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies (old), L - Simulation and Validation (old), L - Structures and Materials (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Kappel, Dr.-Ing. Erik
Deposited On:30 Nov 2015 06:25
Last Modified:10 Jan 2019 15:46

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