the first one!
I have downloaded FEBio and I have started using it.
I think it has amazing capabilities so I have started using it for my PhD project.
I conducted a uniaxial and a biaxial test using a transverse isotropic Mooney-Rivlin material model.
I used my constants and also the ones found on Jeff Weiss’ thesis. What I experienced is that both simulation were not converging even if I was using for small forces (0.01 N or even 0.00001N). They would converge only for stretches lower than 1.1.
FEBio should be a nonlinear finite element software package but with those low stretches and low forces I can not study the non-linear behavior I am interested in.
What can be the problem? Where I am wrong?
I do not think are my constants because also with the ones from the thesis it does not work. Moreover, I think the constraints are ok.
Furthermore, I have a doubt about the fiber local orientation using nodes. If I want them to be oriented on z, what do I have to write: 1, 5? Can I orient the fibers using all the nodes of a hexahedral element or there is some restriction?
Thanks for all the support you will give me
v
I have downloaded FEBio and I have started using it.
I think it has amazing capabilities so I have started using it for my PhD project.
I conducted a uniaxial and a biaxial test using a transverse isotropic Mooney-Rivlin material model.
I used my constants and also the ones found on Jeff Weiss’ thesis. What I experienced is that both simulation were not converging even if I was using for small forces (0.01 N or even 0.00001N). They would converge only for stretches lower than 1.1.
FEBio should be a nonlinear finite element software package but with those low stretches and low forces I can not study the non-linear behavior I am interested in.
What can be the problem? Where I am wrong?
I do not think are my constants because also with the ones from the thesis it does not work. Moreover, I think the constraints are ok.
Furthermore, I have a doubt about the fiber local orientation using nodes. If I want them to be oriented on z, what do I have to write: 1, 5? Can I orient the fibers using all the nodes of a hexahedral element or there is some restriction?
Thanks for all the support you will give me
v
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