Hein, Robert und Prussak, Robert und Schmidt, Jochen (2019) Analysis of thermo-mechanical-chemical properties of GFRP during curing by means of process monitoring and process simulation. DLR-Interner Bericht. DLR-IB-FA-BS-2019-2. andere. 24 S.
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Kurzfassung
Inherent process-induced residual stresses and deformations impede the application of composite parts. Process-induced deformations lead to a mismatch of parts to fit and result into additional assembly effort. To counteract the deformations a compensating tooling design needs to be derived. Residual stresses can reduce the strengths and influence the failure behavior. Unknown residual stresses lead to overweight structures resulting from unnecessary high safety factors. For a more efficient process development and optimization, process simulations are increasingly applied. This work deals with a sensor-supported process simulation method. For a deeper process understanding the process strains of a glass fiber reinforced cross-ply are monitored during the curing process. In order to identify different material phases of the thermoset matrix material dielectric cure sensors are employed. In parallel a process simulation using a viscoelastic material model is applied to calculate the process strains, reaction kinetic and the material phases. The obtained sensor data are used to validate the process simulation, to determine points of material transitions as well as the stored residual strain level and to optimize the boundary conditions, e.g. to model the tool-part interaction. A very good qualitative and quantitative correlation between the measured and simulated process strain could be observed after the calibration step.
elib-URL des Eintrags: | https://elib.dlr.de/133417/ | ||||||||||||||||
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Dokumentart: | Berichtsreihe (DLR-Interner Bericht, andere) | ||||||||||||||||
Titel: | Analysis of thermo-mechanical-chemical properties of GFRP during curing by means of process monitoring and process simulation | ||||||||||||||||
Autoren: |
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Datum: | Dezember 2019 | ||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||
Open Access: | Nein | ||||||||||||||||
Seitenanzahl: | 24 | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | Residual strains; Resiudal stresses; process-induced distortions; Fibre Bragg gratin; Dielectric Sensors; Reaction kinetic; Process simulation | ||||||||||||||||
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 - Simulation und Validierung (alt) | ||||||||||||||||
Standort: | Braunschweig | ||||||||||||||||
Institute & Einrichtungen: | Institut für Faserverbundleichtbau und Adaptronik > Strukturmechanik Institut für Faserverbundleichtbau und Adaptronik > Funktionsleichtbau Institut für Faserverbundleichtbau und Adaptronik > Faserverbundtechnologie | ||||||||||||||||
Hinterlegt von: | Böhringer-Thelen, Isolde | ||||||||||||||||
Hinterlegt am: | 13 Jan 2020 08:52 | ||||||||||||||||
Letzte Änderung: | 13 Jan 2020 08:52 |
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