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Transient and stationary changes of the mechanical properties of the first body governed by the hydrostatic pressure component of the local stress state during dry friction

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DOI: 10.1016/s0167-8922(03)80083-4

Abstract

This paper seeks to analyse the effect of the hydrostatic pressure component of the local stress state from the point of view of transient and non-transient changes in the mechanical properties of the near-surface layer during friction. As a result of a friction load all state factors in the surface layer including temperature, pressure and strain rate change compared with the equilibrium state. In an effort to investigate the changes produced, parallel with the friction tests, a series of mechanical tests was conducted on different materials at atmospheric pressure and under superimposed hydrostatic pressure of 400, 600 and 800 MPa. It is concluded that, in particular, the greatly enhanced deformability induced under conditions of hydrostatic pressure is important to an understanding of the behaviour of the near-surface layer.

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