What Is the Ultimate Tensile Stress of Rubber?

[GaussModulus]

Homework Statement

How would you define the ultimate tensile stress of rubber?

Homework Equations

If I had a force/extension graph of rubber, what point in the graph would show me the value of the ultimate tensile stress??

The Attempt at a Solution

Is it the same thing as ultimate tensile strength??


Help much appreciated
Thanks

 

[mgb_phys]

Ultimate tensile stress is the stress (force/area = pressure) that it breaks at.
The complication for plastic materials is that the cross section area changes so at constant tension the stress is changing.
Ultimate tensile strength is normally defined for a specific component with a given area so it has units of force rather than pressure.