Shrink fit + Inertial load
Shrink fit + Inertial load
(OP)
Hai,
For quick understading: I simulating shrink fit between two cylinders and then i am applying inertia load to the model. I am facing convergence issue could any one can help me on this.
To be more clear, my shrink fit step solves perfectly , then i use the restart option in Ansys, to apply the inertia load (Acceleration) it solves for few substep and then the force convergence value keeps on increasing than the force criterion value. No other external forces were applied.
can anyone help me to solve this issue.
Thanks in advance
regards
Kan
For quick understading: I simulating shrink fit between two cylinders and then i am applying inertia load to the model. I am facing convergence issue could any one can help me on this.
To be more clear, my shrink fit step solves perfectly , then i use the restart option in Ansys, to apply the inertia load (Acceleration) it solves for few substep and then the force convergence value keeps on increasing than the force criterion value. No other external forces were applied.
can anyone help me to solve this issue.
Thanks in advance
regards
Kan





RE: Shrink fit + Inertial load
RE: Shrink fit + Inertial load
I used standard 3D surface to surface contact, also i have specified the CNOF for the shrink fit.
For information, only the outer cylinder is constrained in all DOF.
I am thinking the shrink fit contact pressure developed in the first sub step should hold the inner cylider with the outer one when the inertia (Acceleration)loads are applied in axial direction in second load step. That is right now i don't have any contraint for the inner cylinder.
Please correct me if i am wrong.
kan
RE: Shrink fit + Inertial load
-Brian
RE: Shrink fit + Inertial load
Thanks and you are true. Although I have friction defined between the two cylinders it is not enough to hold them together when I apply the inertia load. With the slightly increased friction value now I could able to solve the problem with the inertia load in the axial direction.
But when I tried to solve for the lateral and vertical Inertial load with the shrink fit results and with the same friction value. I am facing the very very slow convergence in the moment but the convergence with the force in very quick. Very slow convergence in the moment is related to the new friction value !
kan