Homework and Quiz — Stent Deployment

Homework, Part 1

In this homework on Fatigue Evaluation of a deployed stent, we take a stent model that is pre-setup for stent deployment and is ready to run and evaluate the stent for fatigue and report the factor of safety.  Homework documents and inputs can be found here.

• Please utilize the mm, kg, N unit system when solving the Ansys simulation models.
• Please also note that the results you obtain in these nonlinear analyses may differ slightly from those shown in the videos. Numerical round-off due to finite machine precision can be affected by the choice of the operating system, the number of cores, and the type of parallel processing (shared memory vs. distributed memory). Moreover, nonlinear contact and solution algorithms are often improved in each version of our software, so some changes are expected when comparing results between different releases. Thus, your results may differ slightly (within typical engineering tolerances) from the presented results, but this is to be expected for nonlinear analyses, especially for numerically unstable (e.g., underconstrained) models that may be utilized in this course.

Homework, Part 2

In this homework on Best Practices, we take a stent model that is set up with mostly defaults and does not converge.

Work through the process of changing settings to achieve convergence.  Homework documents and inputs can be found here.

• Please utilize the mm, kg, N unit system when solving the Ansys simulation models.
• Please also note that the results you obtain in these nonlinear analyses may differ slightly from those shown in the videos. Numerical round-off due to finite machine precision can be affected by the choice of the operating system, the number of cores, and the type of parallel processing (shared memory vs. distributed memory). Moreover, nonlinear contact and solution algorithms are often improved in each version of our software, so some changes are expected when comparing results between different releases. Thus, your results may differ slightly (within typical engineering tolerances) from the presented results, but this is to be expected for nonlinear analyses, especially for numerically unstable (e.g., underconstrained) models that may be utilized in this course.

Completed simulation files for the above examples can be found here.