Need help with a simple compression test

[Junaid798]

Hello,
I have a cube shape and I am trying to compress it by making the top plate move down at a speed of 1mm/s for 10 seconds (so 10mm total displacement) and then to get a stress vs displacement plot. I understand to get the plot I will need to have an output history request for displacement of the top plate, and one for the von mises stress of the cube. However I do not understand where I am going wrong with my model as it doesn't seem to do what I am trying to get it to do.
I am currently confused as to where to go from where I am right now and would appreciate any help as I am a beginner.
Thank you.

Link to image of assembly:

https://i.gyazo.com/8c819ebf38d1446aff2363b5d46f5f60.png

Link to input file:

https://www.researchgate.net/profil...616727150594@1548342987277/download/Job-1.inp

 

[FEA way]

You made a mistake in amplitude definition. If you want to get maximum displacement of 10 mm you should fill the table like that:

TIME —— AMPLITUDE
0 —— 0
2 —— 0.2
4 —— 0.4
6 —— 0.6
8 —— 0.8
10 —— 1

instead of:

TIME —— AMPLITUDE
0 —— 0
2 —— 2
4 —— 4
6 —— 6
8 —— 8
10 —— 10

Because displacement BC multiplies its magnitude by amplitude so when your magnitude is 10 it will be 100 at the end.

 

[Junaid798]

So with my step time being 10, does that mean using your amplitude table it will be do 1mm every second?

 

[Mustaine3]

Yes.
P(t) = A(t) x F
Applied load at current increment time = Amplitude at current increment time multiplied with Magnitude (load definition value)

Look at the data you define and you will directly know when what value is applied.