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Proof of Concept for Pultrusion Control by Cure Monitoring Using Resonant Ultrasound Spectroscopy

Pommer, Christian and Sinapius, Michael (2020) Proof of Concept for Pultrusion Control by Cure Monitoring Using Resonant Ultrasound Spectroscopy. Journal of Composites Science, 4 (3), p. 115. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/jcs4030115. ISSN 2504-477X.

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Official URL: https://www.mdpi.com/2504-477X/4/3/115/htm


The increasing demand for low cost consistent quality composite materials, especially of the automotive industry, creates the necessity for fast high quality processes. Pultrusion is one of the processes that can fulfill this demand. While the process is highly automated, manufacturing parameters still have to be chosen manually. The choice of line speed, mould temperature and injection pressure is based on best practice and therefore requires manual optimization that results in cost intensive manufacturing errors and suboptimal machine productivity. This paper presents a possible solution for this problem by providing an on-line cure monitoring approach that allows to overcome this challenge. Resonant Ultrasonic Spectroscopy (RUS) shows a high potential for in-line cure monitoring inside the pultrusion tool. RUS has been adapted for the first time in a pultrusion process. This paper focuses on the successful application of this technique to control the pultrusion process based on the state of cure of the material inside of the tool. As one of the only techniques for in-line cure monitoring which can be used continuously in closed tools despite high abrasion, it provides a new insight into the pultrusion process.

Item URL in elib:https://elib.dlr.de/137128/
Document Type:Article
Title:Proof of Concept for Pultrusion Control by Cure Monitoring Using Resonant Ultrasound Spectroscopy
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:Journal of Composites Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:p. 115
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:ultrasonic; cure monitoring; resonant ultrasonic spectroscopy; pultrusion
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 > Composite Technology
Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Schlegel, Linda
Deposited On:09 Nov 2020 08:47
Last Modified:19 Nov 2021 20:39

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