I suppose you know the elastic modulus of the material and the geometrical parameters of the o-ring. Now, how do you want to "stretch" it? Expand it radially while maintaining its circular shape, or stretch it linearly so that it starts looking like a double rope? And what do you intend by "different environments"? Like different temperatures? Whichever the case, the calculation itself should be easy.

Hi Stan,

With different environments, i exactly mean different temperatures. Can you please help me out with some example or demonstration of the same ? Thanks in advance !

I like the phrase “an O ring” (:

Maybe this can help in your findings?

https://www.researchgate.net/publication/245394347_Technical_note_Stresses_in_a_circular_ring_under_two_forces_acting_along_a_diameter