How to do quasi-static / periodic / quasi-static Loading ?

[Nicolas94]

Hello community,

I have problems combining different amplitudes as a loading sequence for my simulation.
For my analysis (Dynamic/Explicit) I want to implement the following amplitude which represent a quasi-static loading followed by a periodic loading and a final quasi-static loading (as shown in qrafic below).

I tried to use the tabular amplitude input to define the loading above via Excel. It works but sometimes I have energy problems which I think could have to do with not enough datapoints of the amplitude for abaqus.

So I want to use the build-in functions. But I think I'm doing something wrong because I dont get the expected results. The loading doesn't follow all the steps.

The Screenshots above show my settings. I hope some experienced user can help me. Thanks in advance for your time.

Regards, Nicolas

 

[FEA way]

Do you apply this load in form of prescribed displacement named LPL ? According to the screenshot of BC Manager, this boundary condition is propagated (unchanged) through all the steps. You should modify it or define additional BCs and suppress previous ones in subsequent steps. By the way, you can also define amplitudes in terms of total time - it’s often kore convenient in such cases.

 

[Nicolas94]

That was my problem. Thanks a lot for the quick reply. Its working now