Abstract
A plasticity index formula for the contact between a flat plane and crater-shaped laser bumps is derived based on contact analysis of a circular cylinder in contact with a flat plane. The plasticity index for “cylinder-on-plane” contacts differs by a scale factor from that for “sphere-on-plane” contacts while the criterion for the deformation mode is the same for both types of contacts. For a wide range of typical head/disk interface conditions, the plasticity index for “cylinder-on-plane” contacts is found to be smaller than that of “sphere-on-plane contacts.” [S0742-4787(00)03501-3]
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