I'm trying to calculate the hertzian stress between a cylinder and rail. I've looked up the formula in Shigley and Mischke's "Mechanical Engineering Design 6th edition". In chapter 2 they give the equation to calculate the width of the area of contact(b) and the max load(Pmax). Once those are known, the equation for stress in the z direction is given as sigma=-Pmax/(1+(z^2/b^2))^.5(adsbygoogle = window.adsbygoogle || []).push({});

I got to that point. But I don't know what the z term is. It's not defined in the book. It's probably something silly I'm overlooking. Could anyone help?

Thanks

Al

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# Hertzian Stress Q

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