ASME.VIII-1 UG-23(g)

[IdanPV]

Hello all,

In the new 2019 Edition there was an update in clause UG-23.
And now, per UG-23(g): "maximum bearing stress shall be limited to 1.60..."

I wanted to know what does ASME means in: "bearing stress"
a. Is it the stress between a plate and a bolt, as can be seen here:

https://www.mathalino.com/reviewer/mechanics-and-strength-of-materials/bearing-stress

b. Is it the contact stress between two adjacent teeth in a gear (for example), as defined by Hertzian Contact Stress theroy?
c. BOTH a&b?
d. Something else, please explain.

Thank you very much.

 

[TGS4]

It is not specifically defined. There is reference to bearing between a gasket and flange in UG-38(d) and UG-46(j), nut and flange in UCS-11(d), UNF-13, and finally in clamped connectors in Appendix 24.

Note the following sentences from the Foreword:

The Code is not a handbook and cannot replace education, experience, and the use of engineering judgment. The phrase engineering judgment refers to technical judgments made by knowledgeable engineers experienced in the application of the Code. Engineering judgments must be consistent with Code philosophy, and such judgments must never be used to overrule mandatory requirements or specific prohibitions of the Code.

If you find that insufficient, you are welcome to submit an inquiry/request for interpretation to the Code Committee:

https://cstools.asme.org/Interpretation/InterpretationForm.cfm

(remember to check if your question has been asked previously

https://cstools.asme.org/Interpretation/SearchInterpretation.cfm)