Convergence problems with ANSYS Workbench SOLID 65 finite element
Convergence problems with ANSYS Workbench SOLID 65 finite element
(OP)
Hello everyone,
I am modeling the debonding between concrete and CFRP subjected to tangential loading (single shear test mode II) using ANSYS Workbench, I used the contact element with CZM created in engineering data. now I have a convergence problem in the model. as you know with workbench you can't choose the element type. you have to insert commands for Solid65. When I use the SOLID 65 concrete finite element, my models lose convergence too early. If I remove cracking and crushing capability (Suppress the commands), there are no convergence problems. Why does this happen and how can I avoid it (I need cracking and crushing)?
I already tried the following to get my model to converge:
1- Refining the mech.
2- Reducing the normal stiffness of the contact region
3- Use newton Raphson residuals.
4- Playing with steps and sub-steps.
Any help or suggestions will be highly appreciated.
Thanks in advance.
I am modeling the debonding between concrete and CFRP subjected to tangential loading (single shear test mode II) using ANSYS Workbench, I used the contact element with CZM created in engineering data. now I have a convergence problem in the model. as you know with workbench you can't choose the element type. you have to insert commands for Solid65. When I use the SOLID 65 concrete finite element, my models lose convergence too early. If I remove cracking and crushing capability (Suppress the commands), there are no convergence problems. Why does this happen and how can I avoid it (I need cracking and crushing)?
I already tried the following to get my model to converge:
1- Refining the mech.
2- Reducing the normal stiffness of the contact region
3- Use newton Raphson residuals.
4- Playing with steps and sub-steps.
Any help or suggestions will be highly appreciated.
Thanks in advance.





RE: Convergence problems with ANSYS Workbench SOLID 65 finite element
We tried to find optimal parameters for concrete and we presented our results here (in Russian)
http://cae-cube.ru/opredeleniye-optimalnykh-parame...
I hope it may help you especially if you use dictionaries =).
RE: Convergence problems with ANSYS Workbench SOLID 65 finite element