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Stick-Slip Friction in Polymer-Polymer Contacts: A Comparison of Two Test Methods
2016 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Friction induced noises are connected to the perception of product quality and durability, and are a concern in the automobile industry. These noises, such as squeaks, are a result of a number of factors ranging from decisions made during the product development process to incompatibility of material mating pairs.These problems are often resolved with a slow and costly “find-and-fix” approach, which preferably should be replaced by approaching the problems during the design stage of the product development process itself. This is achieved by discovering the risk for the squeak phenomenon using simulations. Squeak is a result of a stick-slip phenomenon, which is an unsteady motion where the force responsible for the motion alternates between the static and dynamic frictional force. The simulations performed at Volvo Car Corporation use an input parameter from a Ziegler stick-slip test machine (Ziegler SSP-01) and in order to improve the simulations, more realistic conditions have to be used during tests which corresponds to an actual vehicle environment. To accomplish this, a wide range of input parameters has to be available.In this work, a comparison between the Ziegler SSP-01 machine and the MCR502 rheometer has been done using numerous tests and test parameters, with a focus on normal load and sliding velocity. The results gathered indicated no correlation between the measured coefficients of friction. However, the test machines indicate a risk for stick-slip during similar conditions. Keywords: Friction induced noises, Stick-slip phenomenon, Ziegler SSP-01, MCR502, Experimental comparison

Place, publisher, year, edition, pages
2016. , 54 p.
Keyword [en]
Keyword [sv]
URN: urn:nbn:se:ltu:diva-44879Local ID: 29f9aac9-1f93-4346-9a95-82a28bd06c64OAI: diva2:1018158
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Validerat; 20160626 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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Lundgren, Viktor

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