Fluid–structure interaction (FSI) describes how a movable or deformable structure interacts with an internal or surrounding fluid flow. These interactions can be stable or oscillatory. In oscillatory cases, strain in the solid structure causes movement that reduces the source of strain. The structure then returns to its original state, and the cycle repeats.
FSI is an important factor in the design of many engineering systems, such as aircraft, spacecraft, engines, and bridges. Ignoring oscillatory effects can lead to serious failures, especially in structures made of materials prone to fatigue.
In this tutorial, an FSI simulation is performed on an aluminum body with a flexible tail using Abaqus. Figures from the simulation are shown below.
