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Forced-interaction and spring-in – relevant initiators of process-induced distortions in composite manufacturing

Kappel, Erik (2016) Forced-interaction and spring-in – relevant initiators of process-induced distortions in composite manufacturing. Composite Structures (140), pp. 217-229. Elsevier. DOI: http://dx.doi.org/10.1016/j.compstruct.2016.01.016 ISSN 0263-8223

Full text not available from this repository.

Abstract

Process-induced distortions are still an issue for today’s CFRP applications. Nonetheless, cost-reduction is considerably pushed by OEMs. Low cost tools, made from aluminum or steel, offer significant cost-saving potential compared to the state-of-the-art Invar (Ni36) tools. However, their high thermal expansion affects the final part shape detrimentally. The present paper reports on an experimental pilot study on forced-interaction and spring-in. Distortions of C- and L-profile specimens with unidirectional, cross-ply and quasi-isotropic laminates and thicknesses up to 8.2 mm were manufactured on Invar and aluminum tools. Local and global part distortions were evaluated after manufacturing and compared. The study gives new insight into both acting distortion mechanisms. It quantifies the effect of a high tool CTE on the final part shape, which is of great value for tool and part designers who strive for high-precision composites.

Item URL in elib:https://elib.dlr.de/106972/
Document Type:Article
Title:Forced-interaction and spring-in – relevant initiators of process-induced distortions in composite manufacturing
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kappel, ErikErik.Kappel (at) dlr.deUNSPECIFIED
Date:15 April 2016
Journal or Publication Title:Composite Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :http://dx.doi.org/10.1016/j.compstruct.2016.01.016
Page Range:pp. 217-229
Publisher:Elsevier
ISSN:0263-8223
Status:Published
Keywords:Layered structures; Process-induced distortions; Autoclave manufacturing; Low-cost tooling
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 - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Kappel, Dr.-Ing. Erik
Deposited On:21 Oct 2016 08:06
Last Modified:10 Jan 2019 15:47

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