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An engineering approach for Prepreg characterization

Kappel, Erik (2021) An engineering approach for Prepreg characterization. Composites Part C: Open Access, pp. 1-4. Elsevier. doi: 10.1016/j.jcomc.2020.100083. ISSN 2666-6820.

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Official URL: https://www.sciencedirect.com/science/article/pii/S2666682020300839


Characterizing prepregs for process-simulation purposes is expensive. The present paper reports on a novel approach for thermoset prepreg characterization. It focusses on determining key-parameters which allow for comparing prepregs from a process-induced distortion (PID) perspective. The approach uses conventional thermomechanical-analysis (TMA) devices for data generation. It analyzes through-thickness strains along the whole curing process, which are the dominant driver for spring-in distortions. The measured data is utilized in a parameter-fitting scenario, allowing for characterizing compaction, chemical shrinkage and thermal dilation. Aside from magnitudes, the approach also provides information when chemical-shrinkage occurs during the process. The approach is applied here for quasi-isotropic carbon-fiber-epoxy-resin samples made from (QI) 8552/AS4 while selected comparisons with a corresponding M21E/IMA sample are provided for sake of capability demonstration.

Item URL in elib:https://elib.dlr.de/140011/
Document Type:Article
Title:An engineering approach for Prepreg characterization
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kappel, ErikErik.Kappel (at) dlr.dehttps://orcid.org/0000-0002-8760-8451
Journal or Publication Title:Composites Part C: Open Access
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:No
DOI :10.1016/j.jcomc.2020.100083
Page Range:pp. 1-4
Series Name:Composites Part C: Open Access
Keywords:Layered structures Prepreg characterization Curing-induced shrinkage CTE Process-induced distortions
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Kappel, Dr.-Ing. Erik
Deposited On:09 Jan 2021 15:56
Last Modified:13 Mar 2021 04:14

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