A downhole packer seal helps to prevent flow of fluids upstream in the region between pipe and mandrel. The seal along with other components is shown schematically in the figure below. The simplified packer design shows two ring which compress the seal in the confined area. This is a challenging problems as it involves multiple nonlinearities: material, geometric and contact between multiple components and self-contact. As the geometries and loads are axisymmetric, the problem will be analyzed using an axisymmetric model.
The analysis is performed in two steps. In the first step, top ring is moved downwards which compacts the downhole packer seal and in the second step, a fluid pressure is applied.
Note: This exercise is part of the Solving Non-linear Problems with Abaqus course.