Vol. 2, No. 3, 2007

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On the numerics and correlation of scratch testing

Fredrik Wredenberg and Per-Lennart Larsson

Vol. 2 (2007), No. 3, 573–594

A numerical strategy based on the finite element method and intended for an accurate analysis of the scratch test is presented. For simplicity, but not out of necessity, the material was described by classical von Mises elastoplasticity utilizing large deformation theory. Based on this strategy numerous results are presented and correlation of scratch properties is discussed within the framework of theory for indentation testing. Furthermore, the existence of a representative plastic strain in the spirit of Tabor was studied. The investigation also concerns details regarding frictional effects, normal vs. tangential scratch hardness, similarities and differences between indentation and scratch test characteristics as well as details regarding the behavior of local field variables at scratching.

scratch test, hardness, friction, finite elements, contact
Received: 27 September 2006
Accepted: 29 November 2006
Published: 1 May 2007
Fredrik Wredenberg
KTH Solid Mechanics
Royal Institute of Technology
S-10044, Stockholm
Per-Lennart Larsson
KTH Solid Mechanics
Royal Institute of Technology
S-10044, Stockholm