Reply To: Static Structural vs Transient Strutural – Contact stress

[Lydia]

Hi Ashish,

First of all, you can do both steady state and transient FSI analysis. The choice will be made according to whether you problem is time dependent or not. 

Now:

• Frictionless and non-separation contacts are non-linear contacts which very often create complexities in the model. Frictionless allows surfaces to slide relative to each other without any resistance and in No Separation surfaces can slide but cannot separate. Review this course for more insight on how to use contacts in Ansys Contact Mechanics | Ansys Innovation Courses
• In Transient Analysis it is very important to select the correct timestep. If your timestep is not small enough it is possible you will miss some transient phenomena.
• When viewing your results make sure you have the required scaling of the deformation
• As for the difference in result animations between static and transient structural analyses, it's because these two types of analyses model different types of behavior. A static analysis assumes that loads are applied slowly and that the system's response does not depend on time, whereas a transient analysis accounts for the effects of time and dynamic loading. Therefore, the animation of a transient analysis will show how the structure responds over time to dynamic loads, which can include time-varying forces, impacts, or other time-dependent effects. This can result in different deformation patterns, stress distributions, and other responses that change over the duration of the analysis

Transient Structural Analysis (ansys.com)

Static Structural Analysis (ansys.com)