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The influence of laser welding processes on the weld seam quality of thermoplastic composites with high moisture content
Authors
P. Jaeschke
L. Overmeyer
+3 more
O. Suttmann
Y. Winter
V. Wippo
Publication date
1 January 2016
Publisher
Amsterdam : Elsevier B.V.
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Abstract
Presently, fiber reinforced materials are used for many industrial applications. Laser transmission welding (LTW) is a suitable method to join these materials. For multiple thermoplastics, the weld seam quality is affected by the amount of moisture content in the joining members. For LTW, heat is applied to the welding members and water in the composite changes phase from liquid to gas. Increasing the gas content can lead to detrimental cavities in the weld seam. Therefore, experiments were performed to investigate the influence of the laser focal geometry on the generation of cavities. Different focal geometries lead to different levels of process heat generation which affects the amount of vaporization. The experiments were conducted with endless glass fiber reinforced polyetherimide and endless carbon fiber reinforced polyetherimide. These samples were tested for their weld seam strength and the results were correlated to the moisture content and laser beam geometry. © 2016 The Authors
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Institutionelles Repositorium der Leibniz Universität Hannover
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oai:www.repo.uni-hannover.de:1...
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Crossref
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info:doi/10.1016%2Fj.phpro.201...
Last time updated on 01/04/2019