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Model for the Coefficient of Friction of Plastic Materials under hydrostatic Conditions above Yield Stress
In the framework of a student's thesis, a friction model shall be generated for plastic materials above their yield stress under hydrostatic conditions for high performance applications. The model is generated on the basis of experimental work.
Keywords: Coefficient of Friction, Plastic Materials, Friction Model
In some technical high performance applications, plastic materials are used above their yield stress under hydrostatic conditions. It can be important to know the friction and wear behaviour of these materials. The coefficient of friction (COF) can be highly dependent on the conditions under which it is measured. Usually, the COF is measured under low pressure conditions (c.f. ASTM, DIN standards). These results can tremendously deviate from the COF in the application. For the engineering and optimisation process, an accurate value for the COF is key for precise predictions. Empa developed a method to assess the COF under hydrostatic conditions.
In the framework of a student’s thesis, the method for the determination of the COF in function of the pressure shall be refined and further developed. Analytical models for the friction behaviour of plastic materials shall be generated for an accurate prediction for engineering cases.
In some technical high performance applications, plastic materials are used above their yield stress under hydrostatic conditions. It can be important to know the friction and wear behaviour of these materials. The coefficient of friction (COF) can be highly dependent on the conditions under which it is measured. Usually, the COF is measured under low pressure conditions (c.f. ASTM, DIN standards). These results can tremendously deviate from the COF in the application. For the engineering and optimisation process, an accurate value for the COF is key for precise predictions. Empa developed a method to assess the COF under hydrostatic conditions. In the framework of a student’s thesis, the method for the determination of the COF in function of the pressure shall be refined and further developed. Analytical models for the friction behaviour of plastic materials shall be generated for an accurate prediction for engineering cases.
Generation of a friction model for high performance applications in the field of mechanical engineering/civil engineering. The data for the model is gained experimentally.
Generation of a friction model for high performance applications in the field of mechanical engineering/civil engineering. The data for the model is gained experimentally.
Empa Dübendorf, Lab. 304
Peter Winiger
peter.winiger@empa.ch
Empa Dübendorf, Lab. 304 Peter Winiger peter.winiger@empa.ch