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Preliminary creep test for estimating the long term stowage behavior of DLR's CFRP booms

Meyer, Sebastian and Zander, Martin and Hühne, Christian (2016) Preliminary creep test for estimating the long term stowage behavior of DLR's CFRP booms. 14th European Conference on Spacecraft Structures, Materials and Environmental Testing (ECSSMET), 27.-30. Sept. 2016, Toulouse, Frankreich. (In Press)

Full text not available from this repository.

Abstract

In recent years DLR developed several mechanisms for boom and membrane deploying spacecrafts. Most of these concepts are using thin shell CFRP (carbon fiber-reinforced plastic) booms with a double omega shaped cross section to deploy the membranes. These CFRP booms provide a very volume efficient way for stowing by first flattening and then coiling them up onto a spool. Depending on storage time, up-reeling radius and storage temperature creep resulting from flexure loading might occur in the CFRP material, which could be a potential risk for the functionality of the deployable CFRP booms. This paper addresses the issue of long-term stowage of DLR’s CFRP booms by the means of a preliminary creep test. The test is conducted with flat CFRP specimens made out of the same material as used for the booms. The specimens are reeled on cylinders of different radii and stored under different temperatures, to represent the different thermal loading that can occur and to investigate different hub dimensions for boom stowage. At certain time intervals the specimens are unreeled and the curvature is scanned with an optical system and analyzed. The measured results show that temperature has a greater influence on the residual deformation of the specimens than the up-reeling diameter. Furthermore an estimation of the degradation of the relaxation modulus after 20 years of stowage at room temperature shows that the influence of creep can not be neglected.

Item URL in elib:https://elib.dlr.de/107322/
Document Type:Conference or Workshop Item (Speech)
Title:Preliminary creep test for estimating the long term stowage behavior of DLR's CFRP booms
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Meyer, SebastianSebastian.Meyer (at) dlr.deUNSPECIFIED
Zander, MartinMartin.Zander (at) dlr.deUNSPECIFIED
Hühne, ChristianDLR – Institut für Faserverbundleichtbau und Adaptronik, Braunschweighttps://orcid.org/0000-0002-2218-1223
Date:2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:In Press
Keywords:Deployable structures, De-Orbiting, CFRP, Creep
Event Title:14th European Conference on Spacecraft Structures, Materials and Environmental Testing (ECSSMET)
Event Location:Toulouse, Frankreich
Event Type:international Conference
Event Dates:27.-30. Sept. 2016
Organizer:CNES, ESA, DLR
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Entfaltungstechnologie . Solar Sail (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Meyer, Sebastian
Deposited On:04 Nov 2016 09:13
Last Modified:01 Dec 2018 19:52

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