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Phenomenological Analysis of Thermo-Mechanical-Chemical Properties of GFRP during Curing by Means of Sensor Supported Process Simulation

Hein, Robert and Prussak, Robert and Schmidt, Jochen (2020) Phenomenological Analysis of Thermo-Mechanical-Chemical Properties of GFRP during Curing by Means of Sensor Supported Process Simulation. Processes, 2 (192). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/pr8020192. ISSN 2227-9717.

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Official URL: https://doi.org/10.3390/pr8020192


Inherent process-induced deformations (PID) and residual stresses impede the application of composite parts. PID lead to a geometrical mismatch in assemblies and require subsequent work for tolerance compensation. Unknown residual stresses cause overweighted structures resulting from unnecessary high safety factors. To counteract the deformations, the tool design needs to be modified until the component geometry meets the specifications. This process is mostly carried out empirically and is time and cost intensive. To improve the efficiency of the development process, an in-deep comprehension of the manufacturing processes is mandatory. Therefore, experimental and simulation-based methods are increasingly applied and enhanced. The object of this work is to investigate the development of process-induced strains as well as the material behaviour during the manufacturing for a GFRP plate. The process-induced strains are monitored by optical fiber Bragg grating (FBG) sensors. The change of the material phases is detected by dielectric sensors. Furthermore, a detailed process simulation considering viscoelastic effects and reaction kinetics is performed. Finally, the measurements are correlated with the simulation data to validate the simulation approach. A very good correlation for both the reaction kinetics as well as the process-induced strains is observed.

Item URL in elib:https://elib.dlr.de/130880/
Document Type:Article
Title:Phenomenological Analysis of Thermo-Mechanical-Chemical Properties of GFRP during Curing by Means of Sensor Supported Process Simulation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hein, RobertRobert.Hein (at) dlr.dehttps://orcid.org/0000-0002-6258-3673
Prussak, RobertRobert.Prussak (at) dlr.deUNSPECIFIED
Schmidt, JochenJochen.Schmidt (at) dlr.deUNSPECIFIED
Date:5 February 2020
Journal or Publication Title:Processes
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.3390/pr8020192
EditorsEmailEditor's ORCID iD
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Series Name:Special Issue "Synergies in Combined Development of Processes and Models"
Keywords:process-induced strains; residual stresses; process-induced distortions; fiber bragg grating; dielectric sensors; reaction kinetic; process simulation; viscoelasticity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design, L - Production Technologies
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Institute of Composite Structures and Adaptive Systems > Composite Technology
Deposited By: Hein, Robert
Deposited On:06 Sep 2021 08:45
Last Modified:13 Dec 2021 08:53

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