Hello,
The material model described in Gasser et al (2006) states that the collagen fibers do not support any compression and would buckle. Therefore, the anisotropic part of the HGO model only contributes to the strain energy if the strain in the direction of a_0_i is positive.
https://royalsocietypublishing.org/doi/ ... .2005.0073
I was wondering if the HGO model in svFSI handles this behavior, for example I have read in some places that a Heaviside-type function is used to turn off the effect of fibers during compression (https://polymerfem.com/holzapfel-gasser-ogden-model/). I couldn't gauge much by the code here: https://github.com/SimVascular/svFSI/bl ... ATMODELS.f
Thanks,
Aditya
Question about material model in svFSI
- Aditya Bantwal
- Posts: 60
- Joined: Sat Mar 26, 2022 2:59 am
- David Parker
- Posts: 1680
- Joined: Tue Aug 23, 2005 2:43 pm
Re: Question about material model in svFSI
Hi Aditya,
There is a GitHub Issue https://github.com/SimVascular/svFSI/issues/55 that seems to address decoupling.
And there is code here https://github.com/SimVascular/svFSI/bl ... ELS.f#L363 that implements this for the HO material model.
Cheers,
Dave
There is a GitHub Issue https://github.com/SimVascular/svFSI/issues/55 that seems to address decoupling.
And there is code here https://github.com/SimVascular/svFSI/bl ... ELS.f#L363 that implements this for the HO material model.
Cheers,
Dave
- Aditya Bantwal
- Posts: 60
- Joined: Sat Mar 26, 2022 2:59 am
Re: Question about material model in svFSI
Hi Dave,
If I'm not mistaken, this appears to be implemented only for the HO model, and not for the HGO model.
Thanks,
Aditya
If I'm not mistaken, this appears to be implemented only for the HO model, and not for the HGO model.
Thanks,
Aditya
- David Parker
- Posts: 1680
- Joined: Tue Aug 23, 2005 2:43 pm
Re: Question about material model in svFSI
Hi Aditya,
Yes, sorry, wrong spelling.
The HGO material model documentation does references the Gasser paper but you will need to look at the implementation details (there are two) to really understand what it does, run some tests, etc.
Dave
Yes, sorry, wrong spelling.
The HGO material model documentation does references the Gasser paper but you will need to look at the implementation details (there are two) to really understand what it does, run some tests, etc.
Dave