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Sensitivity analysis of influencing factors on impregnation process of closed mould RTM

Friedrich, Martin and Exner, Wibke and Wietgrefe, Mathias (2011) Sensitivity analysis of influencing factors on impregnation process of closed mould RTM. CEAS Aeronautical Journal. Sprinker. DOI: 10.1007/s13272-011-0032-6.

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Abstract

This paper reports on different parameters that influence the closed mould resin transfer moulding (CM-RTM) process for fiber-reinforced plastics. A sensitivity study of selective parameters is performed. This includes material parameters (i.e., viscosity, permeability), process parameters (i.e., temperature) and geometrical parameters (i.e., position of preform in the tool). Furthermore, fiber type and targeted fiber volume content are considered to validate the full range of fiber-reinforced plastics. As an example for the sensitivity study, the aeronautical carbon fabric G0926 and epoxy resin system RTM6 (both manufactured by Hexcel) are analyzed for targeted fiber volume contents in a range of ~60%. The infiltration of a rectangular panel was simulated with the flow simulation software RTM-Worx by Polyworx. It was found that the infiltration of a simple geometry can differ by app. Factor 3 in terms of duration, when only considering the tolerances of material and process parameters (“upper tolerance limit” vs. “lower tolerance limit” scenario). For different types of composite materials observed in this study, it can even go up to Factor 1,000. To achieve a reliable RTM process, these aspects—material types and range of tolerance—have to be considered.

Document Type:Article
Title:Sensitivity analysis of influencing factors on impregnation process of closed mould RTM
Authors:
AuthorsInstitution or Email of Authors
Friedrich, MartinT2-Composite
Exner, Wibkewibke.exner@dlr.de
Wietgrefe, MathiasFA-MW
Date:17 August 2011
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
In SCOPUS:No
In ISI Web of Science:No
DOI:10.1007/s13272-011-0032-6
Publisher:Sprinker
Status:Published
Keywords:Resin transfer moulding (RTM) process – Closed mould – Process tolerances – Sensitivity analysis – Infiltration time
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems
Deposited By: Wibke Exner
Deposited On:29 Nov 2011 13:56
Last Modified:26 Mar 2013 13:33

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