Spröwitz, T. and Huehne, Chr. and Kappel, E. (2009) Thermal Aspects for Composite Structures - From Manufacturing to In-Service PredictionsI. CEAS 2009, 2009-10-26 - 2009-10-29, Manchester, UK.
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Abstract
Manufacturing of composite structures with a high degree of dimensional accuracy remains a challenge in modern fabrication. Residual stresses in fibre reinforced laminates which develop during the autoclav processing lead to a variety of process induced deformations. Dimensional changes such as spring-in of angled structures and warpage of flat sections are characteristic for composite manufacturing. This paper presents an engineering approch for a thermo-elastic simulation of the spring-in effect on large airframe structures based on the FE method performed at the DLR Institute of Composite Structures and Adaptive Systems. Due to the use of Ni36 as tooling material it was possible to blank out the influence of varying CTE between tool and part which are responsible for warpage. Investigations on small manufactured L-profiles with a flangelength of 50mm deliver the necessary simulation parameters for the constitutive model of the relevant airframe structure. For estimating the influence of different autoclav processes on the amount of spring-in, investigations with different temperature profiles were conducted and will be presented.
Item URL in elib: | https://elib.dlr.de/61395/ | ||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | ||||||||||||||||
Title: | Thermal Aspects for Composite Structures - From Manufacturing to In-Service PredictionsI | ||||||||||||||||
Authors: |
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Date: | 2009 | ||||||||||||||||
Open Access: | Yes | ||||||||||||||||
Gold Open Access: | No | ||||||||||||||||
In SCOPUS: | No | ||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||
Status: | Published | ||||||||||||||||
Keywords: | Composites, CTE, spring-in, thermo-elastic, aircraft structures | ||||||||||||||||
Event Title: | CEAS 2009 | ||||||||||||||||
Event Location: | Manchester, UK | ||||||||||||||||
Event Type: | international Conference | ||||||||||||||||
Event Start Date: | 26 October 2009 | ||||||||||||||||
Event End Date: | 29 October 2009 | ||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||||||||||||
HGF - Program: | Space (old) | ||||||||||||||||
HGF - Program Themes: | W - no assignment | ||||||||||||||||
DLR - Research area: | Space | ||||||||||||||||
DLR - Program: | W - no assignment | ||||||||||||||||
DLR - Research theme (Project): | W - no assignment (old) | ||||||||||||||||
Location: | Bremen | ||||||||||||||||
Institutes and Institutions: | Institute of Space Systems > System Analysis Space Segment | ||||||||||||||||
Deposited By: | Behrens, Nicola | ||||||||||||||||
Deposited On: | 04 Jan 2010 15:32 | ||||||||||||||||
Last Modified: | 24 Apr 2024 19:26 |
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