Shear Strength

[dravid]

Most of the mechanical properties about elastomers(or rubber) are available in the form of Hardness. I want the shear strength of the elastomer,is it possible to calculate such mechanical properties (strength and modulus) from the hardness? If yes from where i can find ther relations.

Thanx

 

[beatfrequency]

Hello,
I would be also very interested in the answer to your question. Please send any information to my hands
(beatfrequency@gmx.de). Many thanks in advance.
Cheers.

 

[rubin]

Hi dravid,

There is an empirical equation of hardness and compression modulus relationship. I believe you will find the equation in a book of Engineering with Rubber by A.N. Gent. By using relation of Eo = 3 G, shear modulus (G) can be determined.

rubin

 

[ElastomerXpert]

The answer you got about the equation in Gent's book (the outstanding work on engineering with rubber)is only useful if you can run the tests with some precision. Basically, a compound's durometer hardness is only a ballpark of its engineering modulus, which will vary at least +/- 30% across a whole range of compounds all with the same hardness.
If you want a simpler book on rubber technology, go to the ACS Rubber Div website and check out "Introduction to Rubber Technology" by Del Vecchio, or for a more advance but still basic book, "Fundamentals of Rubber Technology", edited by the same guy.