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Investigation of the deformation behaviour of microcellular polyurethane foams

Microcellular foams are expanded polyurethanes with a density range from 300 – 600 kg/m3. Due to their excellent mechanical properties like fatigue resistance, low lateral extension and a progressive compression-deformation characteristic, this material is widely used for suspension and noise-vibration-harshness applications in vehicle constructions. The development of parts made of this material is based on experience und many long lasting tests of the suppliers. In order to develop parts faster and cheaper in the future, producers are seeking a way to simulate the materials behaviour. Without having really investigated the deformation behaviour it is impossible to generate an exact simulation code. In this context the thesis deals with three main topics: the viscoelastic- and the damage behaviour and the influence of the cellular structure on the deformation. Besides of the deformation experiments with varying parameters like temperature, outside pressure or deformation disablement, also the microstructure and its influence on the fatigue behaviour are investigated.

Lesen Sie die deutsche Zusammenfassung auf Kunststoffe.de
Author
 Lars Fölster

Lars Fölster
Lehrstuhl für Polymere Werkstoffe
Universität Bayreuth

Information

Free keywords: Polyurethane, Foam, Viscoelasticity, Fatigue, Deformation behaviour
Institute / chair: Fakultät für Angewandte Naturwissenschaften der Universität Bayreuth
Language: German
Technical consultant for expert services: Prof. Dr.-Ing. Volker Altstädt (Betreuer), Prof. Dr.-Ing. Frank Rieg
Publication year: 2009
Provider: Wissenschaftlicher Arbeitskreis Kunststofftechnik (WAK) / Kunststoffe.de

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