Re: [deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

HI Animesh, You forgot to show the most critical part of the error report in your post: The actual source line that's causing the problem! Thankfully it was included in the error log that you uploaded. In file included from

Re: [deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

Dear Animesh, Well, with such a small incremental displacement its probable that you're either working in the linear range of the constitutive model or that the update between equilibrium states is at least linear. So after a single Newton iteration you have probably converged system, and

Re: [deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

Hi Jean-Paul, Thank you for your detailed response. I checked everything twice and found my code consistent with what you suggested. I think I understood the issue of Newton method convergence. The issue is occurring when I am giving a very small compressive displacement as a boundary

Re: [deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

Hi Animesh, > In the documentation in code gallery , it is written that - This code is based off of step-44, and its documentation is largely identical to what's written there.

Re: [deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

Hi Animesh, All of this seems reasonable to me. When you ask each PointHistory class instance for its stress etc., it will forward the call to the specific material instance that is initialised with one of the two sets of material parameters that you're setting in the parameters file. Best,

Re: [deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

Hi Jean-Paul, Another question which might be the reason why I am getting the inconsistencies in my newton-raphson convergence. I just realised this.. What I am doing is the following - I am giving small compressive displacements to the film+substrate. I am also calculating the eigenvalues

Re: [deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

Hi Jean-Paul, There seem to be some inconsistencies in the simulations results that I am getting, therefore I wanted to check if I have applied the material laws properly accounting for the heterogeneities. Below, I have addted the edited functions that are responsible for that. Could you

Re: [deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

Hi Jean, Sorry for late response. Thank you for your detailed answer. Using your suggestions I was able to assign the material ids to different area of my domain of interest. Thanks again! Animesh On Tuesday, October 27, 2020 at 3:05:39 AM UTC+5:30 Jean-Paul Pelteret wrote: > Dear

Re: [deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

Dear Animesh, Let me preface my suggestion by saying that you can introduce some heterogeneity in more than one way. That is, you're not bound to using a material ID (which is what I'm going to suggest), but you could use some geometric arguments to determine which class or material

[deal.II] Quasi Static Compressible Finit Strain for Heterogenous Hyperelastic material

Hello All, I am trying to solve the wrinkling problem of a thin stiff film attached to a soft substrate in dealii. I am using the code - from the code gallery for this purpose. For the simulations, I would have to consider the film and the substrate with different material properties. I