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Amar17

Static vs dynamic analysis

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Hello everybody, my question is, what yields more stress static or dynamic (transient) analysis? 

According to what I could know up til now, it is dynamic analysis in which the stress  values are expected to be higher in case of the static analysis.

 

It it always likely to happen that stress values will be higher in case of the transient analysis if I perform both analyses for the same structure?  Please guide.

 

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Hi,

In static or quasi-static analysis the load is applied slowly so that the structure deforms very slowly and the inertia force is very small, thus negligible. Opposite to this,if the force or load applied have a high rate of change of velocity during the process then it comes under dynamic analysis. Dynamic loads are always applied as a function of time or frequency. Since we are applying the loads with the high rate of change over a time the structural response will be also similar which results in high stress values.

Please go through our ebook on Practical Aspects of Finite Element Simulation (A Study Guide) where the theoretical aspects of static and dynamic analysis are well covered with examples. 

 

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