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Development of VARTM Process for the Production of Glass-Fibre Components
2015 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The Vacuum-Assisted Resin Transfer Moulding (VARTM) process is a manufacturing technique widely used in the industry because of the high number of cycles achievable and low processing costs reachable. Thus the range of application is relatively wide covering Automotive, Marine and Aerospace industry. The production of composite leaf springs shows the actual limitations of the technique. Due to the important thickness of the components the understanding of the resin flow is of great interest. It has therefore a strong influence on the dry spots, resin pockets, fibre waviness and so on. Because the presence of these defects in the parts makes their mechanical properties unstable these issues need to be studied.The aim of this Mater Thesis is to improve the VARTM process for the production of Glass fibre/Polyurethane leaf springs for automotive applications. Due to the complexity of the process and the short time to obtain stable high quality components only a few of the sub-processes will be treated during this work: preforming, resin infusion and tempering (with a focus on preforming and tempering). The work will be conducted through the analysis of the produced components combined with the data extracted from the production line. This analysis should lead in a first time to the key sub-process(es) responsible and to the specific parameter(s) in a second time. Adjustments and optimisations will then be validated through Advanced Quality analysis on the defects of the material (optical control), stiffness tests, glass transition temperature and fibre volume content measurements. Results will be analysed on a six months range in order to evaluate the evolution of the process and the benefice of the modifications.

Place, publisher, year, edition, pages
2015.
Keyword [en]
Technology, VARTM, composite, automotive, process, RTM, GFRP, curing, fibre waviness
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-51445Local ID: 8a7ee424-c366-4bdf-8029-5be6593839dcOAI: oai:DiVA.org:ltu-51445DiVA: diva2:1024806
External cooperation
Subject / course
Student thesis, at least 30 credits
Educational program
Materials Engineering, master's level
Examiners
Note
Validerat; 20150925 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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