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Stick-slip in the scratching of styrene-acrylonitrile copolymer

Published online by Cambridge University Press:  31 January 2011

Kangjie Li ,
Beta Yuhong Ni  and
J.C.M. Li
Kangjie Li
Affiliation:
Department of Mechanical Engineering, Materials Science Program, University of Rochester, Rochester, New York 14627
Beta Yuhong Ni
Affiliation:
Eastman Kodak Company, Rochester, New York 14652
J.C.M. Li
Affiliation:
Department of Mechanical Engineering, Materials Science Program, University of Rochester, Rochester, New York 14627
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Abstract

Stick-slip process occurred during the scratch test of styrene-acrylonitrile copolymer. For the first time, a bamboo-like morphology of the scratch track corresponding to the stick-slip phenomenon was observed. A “joint” was formed during the stick stage and during slip a uniform “stem” was made. The period and amplitude of the stick-slip both increase with the vertical load and decrease with the driving speed. A theoretical model is constructed based on the stiffness of the system and the plastic deformation of polymer both in the vertical and horizontal directions. The model assumes no distinction between the coefficients of static and kinetic friction and gives quantitatively consistent results with experiments.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 6 , June 1996 , pp. 1574 - 1580
Copyright
Copyright © Materials Research Society 1996

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