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Aufsatz
Investigation of residual stresses in polypropylene using hot plate welding
(2020-08-05)
During the cooling process of the molten material, residual stresses appear because the reduced volume of the cooled material cannot fully fill the space formerly occupied by the molten material. The morphology in and around the weld is formed by different factors depending on the material and process parameters. Different morphological structures relate to different mechanical properties. The process parameters and the welding results including morphology and residual stress are linked together. In this article, ...
Teil eines Buches
Brands and branding in the non-profit sector − theoretical overview and discussion
(Publishing House of the University of Economics, 2015)
Branding has been acknowledged as a fundamental function for companies (e.g. Aaker & Shansby 1982: 56; Ambler et al. 2002: 13; Doyle 1990: 5; Gardner & Levy 1955; Grönroos 2007; Homer 2008; Keller 1993). A brand may be explained as an entirety of perceptions and feelings that consumers associate with a product/service recognized by a brand name. Included are aspects like distinctiveness (e.g., its packaging and logos), quality, performance, familiarity and user imagery (e.g. Batra, Ahuvia & Bagozzi 2012). Brands ...
Zeitschrift
Jahresbericht 2013/2014
(Universität Kassel, Fachbereich Wirtschaftswissenschaften, 2015)
Zeitschrift
Jahresbericht 2011
(Universität Kassel, Fachbereich Wirtschaftswissenschaften, 2012)
Zeitschrift
Jahresbericht 2018
(Universität Kassel, Fachbereich Wirtschaftswissenschaften, 2019)
Aufsatz
Energy Resolved Residual Stress Analysis with Laboratory X-Ray Sources
(2017-04-17)
It is well known that existing residual stress fields play an important role for strength and lifetime of components. Consequently there is a great interest in the availability of fast, reliable and possibly nondestructive methods for their determination. In this context, X-ray diffraction methods play an important role in technical practice as well as in scientific research. They are based on the determination of lattice strains from which residual stresses are determined applying Hooke's law with appropriate elastic ...
Aufsatz
Bend Straightening of a Carbonitrided Gear Shaft – Consequences on Residual Stresses and Retained Austenite near the Surface
(2017-06-20)
Carbonitriding of shafts in drive technology is strongly connected with distortion. Bend straightening is an important process step in order to eliminate distortion without removing the hardened surface layer. As shown in several investigations, even for simple part geometries, bending induced stresses and plastic deformations have a strong impact not only on the residual stress state but also on the microstructure after straightening. As gear shafts become increasingly filigree and complex in their geometry, the ...
Verschiedenartige Texte
Museumsgeschichte in Kassel
(2015-07)
Die Zusammenfassungen des aktuellen Forschungsstandes und die Recherche der Bildquellen, mit deren Hilfe die zehn Stationen der Kasseler Museumsgeschichte hier vorgestellt werden, sind von Studierenden des Studiengangs Kunstwissenschaft an der Kunsthochschule der Universität Kassel in zwei aufeinander aufbauenden Projektseminaren im Sommersemester 2012 und im Wintersemester 2012/13 unter der Leitung von Prof. Dr. Alexis Joachimides erarbeitet worden.
Aufsatz
Climatic Ageing of Components of Polymer Based Electrochromic Devices
(2013-09-09)
Combining a shading function and a polycarbonate window displays an attractive alternative to the currently employed glass roof in vehicles. However, the ageing of such a device must be investigated before any application. Therefore, our investigations focus on the ageing of the components of a polycarbonate based electrochromic device. The optical, electrical, mechanical and electrochemical properties of the ion storage layer as well as the substrate will be assessed after storage in a climate with a high humidity ...
Aufsatz
UV Surface Treatment of Polycarbonate for Adhesion Improvement to Liquid Silicone Rubber (LSR)
(2018)
The adhesion of self-adhesive liquid silicone rubbers to thermoplasts is only possible for a few selected material combinations without a surface pretreatment. A UV pretreatment is effective for polycarbonate and short irradiation periods are sufficient. To clarify the required irradiation conditions that result in an improvement of adhesion, the varying irradiation conditions were assessed. FTIR-ATR spectroscopy was used for surface analysis to characterize the change in the polymer surface.