modelisation of pure shear tests

[infinite]

Good morning,

I am a new member in this web site. I am working with a certain reinforced (carbon black) synthetic rubber in pure shear tests and i wondered how i could modelise the pure shear test in the case of a synthetic rubber. As i am not a specialist in programmation, what could you advise me.I assume that the material is uncompressible, the Poisson ratio is 0.5 (the modulus is around 1MPa).

Furthemore, I have searched in a lot of books for explaining why we call it pure shear test, but i just found sentences saying that a stress is created at 45° of the crack. Could you direct me toward a site which could give a documentation or any kind of explanation.

Thank you very much for any help you can give me.

Best regards.

infinite.

[Jorgen]

I don't quite follow your question, but remember that there is a difference between pure shear and simple shear. Also, for an incompressible material that is deformed in a uniaxial planar mode the deformations state is equivalent to pure shear. That is likely what is meant by the 45 deg angle ahead of the crack.

- Jorgen

[infinite]

Good morning Mister Bergstrom,

I just wondered where I could find a documentation about this test in a mechanical way. I mean how do we know that we have a 45° ahead of the crack (I know that if we apply a pure shear test on a cube sample, we have a 45° deformation state).

I am also interested in all about the modelisation like Abaqus code (I will soon buy a student licence). When I will have it, I would like to modelise the test. But maybe for this point, I will ask your later.

Best regards.

[infinite]

Dear Mr Bergstrom,

I have ordered a student version of Abaqus and I will try to use it even if i am not a specialist of programmation, so if you have any advise to give to a beginner. It is the moment. I wondered if it was possible to create links between Abaqus and Matlab (I have just received a Matlab licence).

So, what tool do I need to try to modelise the pure shear test ?

I know that this question will imply a lot of answer, but I am patient. I just would like to know how to modelise the stress zone near the crack.

Thank you for your help.

Regards.

Infinite.