Homework and Quiz — Vessel and Plaque Representation

Homework, Part 1

In this homework, we identify the optimal hyperelastic strain energy density function to represent the vessel wall material using curve fitting tools and validate it through FEA simulation.  The homework document 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, we will model a challenging plaque geometry inside a vessel wall and validate it. The homework document 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 operating system, number of cores, and 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.