Rivets are a type of fastener used to create permanent attachment between two sheets of material. A rivet typically consists of a cylindrical body with a head on one end. It is inserted through a hole in the sheets of material and other end is compressed such as to expand the diameter, pinching the sheets. The traditional Lagrangian formulation fails to give satisfactory solution as mesh becomes distorted extensively near the corner and contact interaction cannot be treated correctly. Therefore ALE adaptive meshing is used to make sure a a high-quality mesh is maintained throughout the analysis. ALE adaptive meshing technique smooths the mesh by re-positioning nodes.
This is a challenging problems as it involves multiple nonlinearities: material nonlinearity, geometric nonlinearity and contact between multiple components. As the geometries and loads are axisymmetric, the rivet forming problem will be analyzed using an axisymmetric model. The analysis is performed using explicit solver.
Note: This exercise is part of the Solving Non-linear Problems with Abaqus course.