ANSYS Classic skills
Good afternoon,
I create this post because I hope to somebody help me to complete my Ansys knowledge.
First of all I using ansys environment knows like ansys classic or traditional. I working with him couple 4 ears.
So, I encountered the next problem: I must study some ansembly, when one components have elastic properties (like rubber) and on Mooney-Rivlin apear two coeficient C01 and C10 . In help manuals this coeficients apear like material properties. What properties of material ? E (Young modulus), Poisson. Morre than that I look on other material properties, and apear 3 or 4 terms for Cxx. How can be determinate analitics. What properties of materials representing this coeficients.
Thank’s to all in advance for answare and supports.
Best regards
If you look at the ANSYS Help manual, you’ll see that C01 and C10 can be related to initial shear modulus. The material compressibility parameter d is twice the inverse of the initial bulk modulus. For linear elastic materials, the shear and bulk moduli are related to the Young’s modulus and Poisson’s ratio as shown on Wikipedia:
http://en.wikipedia.org/wiki/Elastic_moduli (see bottom of page)
The material coefficients for phenomenological models like Mooney-Rivlin only have physical meaning for the first 2 coefficients, C10 and C01. This is because they are phenomenological models. You can think of it like a general equation to capture the observed behavior. Consequently, the coefficients should be obtained not by using elastic modulus or Poisson’s ratio but by curve-fitting experimental (test) data. Remember that Young’s modulus and Poisson’s ratio describe linear elastic material behavior. Hyperelasticity uses a strain energy potential, and it is nonlinear (in fact, different stress-strain behavior depending on the mode of deformation), so they should not be viewed in an equivalent manner. (We speak of “initial” shear and bulk moduli for hyperelastic materials since these values are not constant, unlike linear elastic materials where properties are constant with respect to strain.)
Lastly, please don’t post questions on blog.ansys.net. Contact your local ANSYS support office or XANSYS mailing list. Sorry, but this site is not meant to serve as a general place to post your questions.
Regards,
Sheldon