Viton sheet elongation % in X-Y plane......
Viton sheet elongation % in X-Y plane......
(OP)
Hi All,
Has anyone dealt with multi-plane elongation before?
I have a Viton sheet 1/32 thk that has an elongation % of 100. Thus I assume that a 1" long sample should be able to stretch to 2" long in the X direction before breaking.
I believe the std Elongation % test is only in one direction (X), but what happens when the sample is stretched in both the X and Y planes equally and simultaneously? It can't stretch to 2" x 2" right? Would it then be a function of the varying areas (e.g. Af/Ai = 2/1)?
All help greatly appreciated,
Quiz
Has anyone dealt with multi-plane elongation before?
I have a Viton sheet 1/32 thk that has an elongation % of 100. Thus I assume that a 1" long sample should be able to stretch to 2" long in the X direction before breaking.
I believe the std Elongation % test is only in one direction (X), but what happens when the sample is stretched in both the X and Y planes equally and simultaneously? It can't stretch to 2" x 2" right? Would it then be a function of the varying areas (e.g. Af/Ai = 2/1)?
All help greatly appreciated,
Quiz





RE: Viton sheet elongation % in X-Y plane......
RE: Viton sheet elongation % in X-Y plane......
Will do....the more I think about it, something tells me it could be a funtion of area also. For the example I gave originally, if you stretch a 1 x 1 sheet in the X direction only 100% to a final length of 2 x 1 that is a 100% stretch and also a 100% increase in area. Does this make sense?
Quiz
RE: Viton sheet elongation % in X-Y plane......
RE: Viton sheet elongation % in X-Y plane......
That's Poisson's Ratio you're referring to. Yes, I'm aware of that but was mainly concerned with the ultimate tear point at max biaxial elongation in relation to changing areas.
Quiz
RE: Viton sheet elongation % in X-Y plane......
Rubber is a complicated material, and there is no easy way to predict its properties...see
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A good friend and chemist/rubber expert once told me that molding rubber is like baking bread - you mix it, stick it in a mold and bake it, and hope it turns out like it did last time.
RE: Viton sheet elongation % in X-Y plane......
Think of a piece of string. If the two ends are pulled so the string is taught then the mid-point has a very limited range of possible movement. If the string is slack the mid-point is free to move over a much wider range.