Topic was JB weld to hold stud in stripped hole. Also considering the subject of stripped threads.
JB weld is 5000 PSI tensile strength. I'll assume the same for shear.
J-B Weld is The Original Cold Weld two-part epoxy system that provides strong, lasting repairs to metal and multiple surfaces.
www.jbweld.com
6mm diameter hole, 6mm deep. 0.175 in^2 surface gives 876 pounds pull-out.
Aluminum M6x1 bolt, 30,000 psi tensile strength (I also find references to shear strength being same figure.)
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1 mm pitch 60 degree angle thread leaves 4mm diameter core (and a nice V groove for stress concentration?)
0.0195 in^2, 584 pounds to break.
Aluminum coefficient of friction 1.2 dry, 0.3 lubricated
Table of static and dynamic friction coeffcient and friction equations given in imperial and SI metric units.
www.engineersedge.com
Torque to 4nm?
Calculate required bolt torque.
www.engineeringtoolbox.com
Clamping force 556 N dry, 2222 N lubricated
Newtons to Pounds Conversion Calculator, Conversion Table and How to Convert.
calculator-converter.com
That's 125 pounds dry, 500 pounds lubricated
Torqued to 4 nm with dry threads seems good, lubricated would be in danger of breaking an aluminum bolt.
The JB weld epoxy appears strong enough, holds as much as the aluminum bolts which came with the cells and torque recommendation. (my SWAG wasn't half bad)
Stainless stud of course is stronger, 100,000 PSI or 3.33 times as strong.
As for stripping threads, I thought of 1mm wide thread base, 6mm diameter for female thread, 6 turns.
6 x pi x 6 = 113 mm^2, 0.175 in^2, 5260 lbs if 30,000 psi shear strength.
My calculation is way off. Does something stretch so it shears a little bit at a time?