How Much Weight is Needed to Break Super Glue Under Pressure?

[big_c147]

Hello All

Myself and a friend have been having a discussion around force and pressure, neither of us have been able to come up with an answer to this question:

My friend has brought some super glue which claims to be able to withstand 1500lbs psi pressure.

This prompted the hypothetical question: If we were to glue a 1 inch square piece of metal to the under side of a table, and were then to hang a weight from it, How much weight would be required to separate the metal from the table?

Is anyone able to point me in the right direction or help us solve our discussion point once and for all!

Thanks in Advance
Craig

 

[Doc Al]

What's to figure out? Taking the 'withstand 1500lbs psi pressure' at face value (I'm sure there are many caveats) and assuming your load was uniformly distributed over that 1 square inch, you'd need 1500 lbs to create such a pressure.

 

[big_c147]

Hi, It would appear that neither of us actually understood the term PSI and now feel rather silly :P

Thanks for the reply!

 

[JDługosz]

But that's not pressure, that's tension.

 

[cjl]

Stress, actually (tensile stress to be exact).

Also, note that the given value is probably an absolute ideal case, so in most situations, it would separate with less force than the calculated quantity.

 

[Doc Al]

But that's not pressure, that's tension.

That's true. I just assumed that they meant tension per square inch despite saying "pressure". (But perhaps that's way off.) I should have made that clear.