Understanding dynamic implicit (quasi-static) mode 1

[apal21]

Hello,

I wanted to do a quasi-static analysis, and someone told me to use Dynamic implicit mode (with quasi-static turned on). I just want to understand what dynamic implicit mode means? It's named dynamic, but it runs the static solver (static.exe). What is the difference between it and dynamic explicit and the normal static mode?

Thank you.

 

[FEA way]

The difference between dynamic implicit and dynamic explicit is in time integration scheme used for equation of motion. These steps use separate solvers and are applied to different types of problems. Both may solve quasi-static cases (dynamic events so slow that inertial effects can be ignored). Quasi-static analyses are time-dependent while in static simulations physical time is not used (so called step time is just a measure used for load incrementation).

 

[apal21]

Can you tell me something about how exactly dynamic implicit applies its in-built quasi-static mode?

 

[FEA way]

When you enable the quasi-static application mode, Abaqus changes solver settings. It uses backward Euler time integration instead of default Hilbert-Hughes-Taylor. It also changes time incrementation type and introduced high numerical damping so that quasi-static solution can be obtained.

 

[apal21]

Got it, thank you very much.

 

[IceBreakerSours]

For questions of this nature, you should read the documentation.

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