Calculation of friction stresses between 2 materials

AI Thread Summary
The discussion focuses on calculating friction stresses between a 1 mm thick soda-lime silica glass slide and a 1/4" ball bearing under a constant load of 2000g. The goal is to evaluate how these friction stresses contribute to potential damage on the glass surface. An initial experiment assessed the static coefficient of friction between the ball bearing and the glass. Participants note that analyzing the contact loading stress without friction is simpler, suggesting a review of "spherical indenters" for further insights. Understanding these friction stresses is crucial for predicting damage to the glass.
Peter de Haan
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Dear All,
I am looking for a method to calculate the friction stresses created in 1 mm thick, fully supported, slide of soda-lime silica glass.

In this experiment a 1/4" ball bearing of various metals is being translated over the glass surface under a constant load of 2000g. The glass slide is then being tested to evaluate the breaking force in order to ascertain if the metal damaged the glass surface.

In a further experiment I have evaluated the static coefficient of friction between the 1/4" ball bearing and the glass.

What I am interested in is to evaluate the friction stresses as these are related to the creation of damage on the glass surface.
 
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Have you considered just the stresses caused by normal loading of the bearing on the slide at 2000 gm without friction? It's a pretty complicated contact loading stress analysis problem to analyze, and that's much simpler than the case with friction included. Look up "spherical indenters" on Google.
 

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