Dear Tetsuo I have recently uploaded an example with an axisymmetric uniaxial tension simulation under the contrib folder. You can try it if you like. By the way I have also noticed that when I use your vtu export functions, instead of vtk, in that file, I get a corrupted vtu output. Paraview complains with: [image: image.png] Maybe you could check that as well.
Best regards Kostas On Fri, Dec 18, 2020 at 5:44 AM Tetsuo Koyama <[email protected]> wrote: > Dear Kostas > > Thank you for your email. > I was impressed that GWFL can do it. I will try it. > And I was also impressed that we can express hyperelastic material. > > Best regards > Tetsuo > > 2020年12月17日(木) 22:16 Konstantinos Poulios <[email protected]>: > >> Dear Tetsuo >> >> GWFL can do this. Here is an example of modelling a hyperelastic material >> in an axisymmetric problem: >> >> md.add_initialized_data("K", E/(3.*(1.-2.*nu))) # Bulk modulus >> md.add_initialized_data("mu", E/(2*(1+nu))) # Shear modulus >> md.add_macro("F", "Id(2)+Grad_u") >> #md.add_macro("F3d", >> "[1+Grad_u(1,1),Grad_u(1,2),0;Grad_u(2,1),1+Grad_u(2,2),0;0,0,1]") >> md.add_macro("F3d", >> "Id(3)+[0,0,0;0,0,0;0,0,1/X(1)]*u(1)+[1,0;0,1;0,0]*Grad_u*[1,0,0;0,1,0]") >> md.add_macro("J", "Det(F)*(1+u(1)/X(1))") >> md.add_macro("devlogbe", "Deviator(Logm(Left_Cauchy_Green(F3d)))") >> md.add_macro("tauH", "K*log(J)") >> md.add_nonlinear_generic_assembly_brick(mim, >> "2*pi*X(1)*((tauH*Id(2)+tauD2d):(Grad_Test_u*Inv(F))+(tauH+tauD33)/(X(1)+u(1))*Test_u(1))") >> >> Could you try if this works for you? >> >> Best regards >> Kostas >> >> On Thu, Dec 17, 2020 at 11:09 AM Tetsuo Koyama <[email protected]> >> wrote: >> >>> Dear getfem users. >>> >>> Excuse me for my frequent questions. >>> I would like to solve the problem of axisymmetric elements in >>> cylindrical coordinate. >>> >>> I tried to use a GWFL to simulate a two-dimensional mesh as a mesh of >>> axisymmetric elements, but I couldn't. As you know, Grad and Div are >>> different for cartesian coordinate and cylindrical coordinate systems. >>> Is there a good way to solve this problem? >>> >>> Best Tetsuo. >>> >>
