I am studying the dynamic interaction of cracks in infinite plane under harmonic plane strain loading. In order to compare with my analytical solution, I want to use the ANSYS to obtain the simulation results. Anyone knows which element I should use to simulate the infinite boundary conditions. It is a dynamic problem, so I cannot just use a big plane to replace it. I need to use the absorption boundary to ensure there is no elastic waves reflected by the boundaries. I appreciate it a lot if you could provide any answers or any documents or link about this problem.Thanks!
To my knowledge, there is no accurate boundary condition for this type of problem in ansys. A reasonably straightforward solution would be to apply an absorbing region, i.e. a rather long plate section with increasing damping. The parameters are a bit tricky to adjust though. An exact solution can be obtained using the Scaled Boundary Finite Element Method as described in Gravenkamp, H., Birk, C., & Song, C. (2015). Journal of Computational Physics, 295, 438–455. I might be able to provide you with a reference solution if you are interested.
Dear Hauke, Thanks a lot for your quick and useful response. I just read your article about SBFEM. It is interesting. Now I am trying to use FLUID29 or INFIN110 in APDL to realize the non-reflecting boundary. If it doesn't work, I will move to SBFEM. Thanks again.
- Badges
- Science topic