Abstract

The mechanics of load transfer in the curved sliding compression-only surface of a spherical bearing, containing a layer of polytetrafluoroethylene (PTFE), under external applied horizontal load, and the implications for design of such a bearing are the topic of this paper. Relevant literature indicates that the critical parameters are the ratio of horizontal to vertical load, and the ratio of the radius of curvature to the plan diameter of the interfacing spherical surfaces. An experimental program to measure the stress-displacement relationship of confined PTFE discs, under uniaxial and eccentric compressive loading, is described and a bilinear stress-displacement is proposed.

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