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SHAPE ADJUSTMENT PROCESS FOR EPOXY COMPOSITES DURING POST CURE

Schmidt, Jochen (2016) SHAPE ADJUSTMENT PROCESS FOR EPOXY COMPOSITES DURING POST CURE. In: Sampe 2016 Proceedings. Sampe 2016, 2016-05-23 - 2016-05-26, Long Beach, USA.

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Kurzfassung

There is an increasing request for high precision composite parts for aeronautic natural laminar flow and low radar cross section applications. The allowed geometrical deviations for such applications are an order of magnitude lower than todays accepted tolerances. The implementation of established measures like tool compensation for spring-in or thermal expansion prior to the manufacturing process significantly reduces the occurring geometrical tolerances. But there are also variations during the manufacturing process that cannot be compensated in advance such as deviations during ply application or varying fiber angles. This publication shows a way how to adapt the manufacturing procedure to achieve high precision composite parts despite of process deviations. The curing characteristics of epoxy resins enable a two-stage curing process. In the initial step the resin is cured to about 65 % chemical interlacing. The viscoelastic properties of partially interlaced epoxides close to their current glass transition temperature allow an adjustment of the components geometry during the following post cure. This can be achieved using a closed loop temperature control combined with a cure monitoring and a geometry measurement system. This means that process induced deviations of composite components made from thermoset matrix systems can be adjusted during the post cure process.

elib-URL des Eintrags:https://elib.dlr.de/104677/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:SHAPE ADJUSTMENT PROCESS FOR EPOXY COMPOSITES DURING POST CURE
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Schmidt, JochenJochen.Schmidt (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Mai 2016
Erschienen in:Sampe 2016 Proceedings
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Epoxy, Accuracy, Curing, Degree of Cure, Shape Adjustment, Deviation
Veranstaltungstitel:Sampe 2016
Veranstaltungsort:Long Beach, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:23 Mai 2016
Veranstaltungsende:26 Mai 2016
Veranstalter :Society for the Advancement of Material and Process Engineering
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen und Werkstoffe (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Faserverbundtechnologie
Hinterlegt von: Schmidt, Jochen
Hinterlegt am:18 Jul 2016 12:01
Letzte Änderung:24 Apr 2024 20:10

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