Nonlinear contact convergence problem in ANSYS Workbench?

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SUMMARY

The discussion centers on a nonlinear contact convergence issue encountered in ANSYS Workbench during a static structural simulation involving a gear and a spring. The user experiences convergence problems specifically when the spring passes over the top of a gear tooth. Various parameters have been adjusted, including the normal stiffness factor (0.01, 0.1, 1), stabilization damping factor (0, 0.1, 1), detection method, and aggressive time step controls. Despite these adjustments, the convergence issue persists, indicating a need for further investigation into contact settings and simulation parameters.

PREREQUISITES
  • Understanding of ANSYS Workbench static structural module
  • Familiarity with nonlinear contact mechanics
  • Knowledge of convergence criteria in finite element analysis
  • Experience with parameter tuning in simulation settings
NEXT STEPS
  • Research advanced contact settings in ANSYS Workbench
  • Explore techniques for improving convergence in nonlinear simulations
  • Learn about the impact of time step controls on simulation stability
  • Investigate the use of adaptive meshing in ANSYS for complex contact scenarios
USEFUL FOR

Engineers and analysts working with ANSYS Workbench, particularly those involved in simulations with complex contact interactions, such as gear and spring systems, will benefit from this discussion.

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I am using the static structural module of ANSYS workbench to do a simulation. In my model, there is a gear and a spring which presses against the gear, moves along it and pushes it to turn counterclockwise. These two objects are in frictional contact. In my calculation, I always have the problem of convergence at the moment when the spring pass the top of a gear tooth. I tried to adjust different parameters of the contact: normal stiffness factor (0.01,0.1,1), stabilization damping factor (0,0.1,1), detection method and time step controls. (I set to update stiffness aggressively after each Iteration). The problem is always there. Do you have any ideas how I can have my calculation converged? Thank you.
 
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