94 research outputs found
study on the validation of ring filament winding methods for unidirectional preform ply manufacturing
AbstractRing filament winding enables processing of continuous fibers for manufacturing unidirectional non-crimp unidirectional preform plies on straight-, curved-, or closed-mandrel geometries. However, unidirectional processing of tows can lead to increased lateral tow slippage. The objective of the present study is thus to validate unidirectional winding methods for ring filament winding, performing geodesic and non-geodesic trajectories analytically and experimentally. Implementation of geodesic paths investigates the influence of the tensile force and take-up velocity on the winding angle reproducibility. Non-geodesic winding paths are conducted here dependent on winding methods, slippage coefficients, and the mandrel's surface materials, evidencing the occurrence of lateral tow slippage by measurements of nip-point forces. Findings indicate an excellent reproducibility of geodesic paths independent of the process velocity. Non-geodesic paths were partially validated because of the occurrence of late..
Leitfaden der Erdkunde für Mittelschulen; Geographische Grundbegriffe, Übersicht der Länderkunde, Das Königreich Bayern
Erdkunde für Lyzeen und höhere Mädchenschulen; Länderkunde von Europa ohne das Deutsche Reich, Die koloniale Stellung der europäischen Mächte
Geographie für höhere Lehranstalten; Wirtschaftsgeographie des Deutschen Reiches und seiner Kolonien mit besonderer Berücksichtigung des deutschen Anteils am Welthandel und Weltverkehr
Leitfaden der Erdkunde für Mittelschulen; Heimatkunde, Globuslehre, Das Königreich Bayern, Überblick über die Erdoberfläche
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