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split hopkinson pressure bar

split hopkinson pressure bar

split hopkinson pressure bar

(OP)
im currently doing FEM analysis on split hopkinson pressure bar compression testing using abaqus. Below is some problem that im facing now:-
1. i do not know how to apply a nonuniform velocity on the striker bar.
2. The elastic wave i generated on the input bar does not contain reflected wave.

RE: split hopkinson pressure bar

Do you mean non-uniform as in velocity that changes with time? if so, employ *AMPLITUDE and vary your velocity sa you want it.

If you mean non-uniform velocity with respects to location on a model, you will likely need to employ a subroutine - I understand this is using DISP (this method can also be used to create a time-based + location based non-uniform input).

Hope this helps

RE: split hopkinson pressure bar

(OP)
yea, non-uniform velocity changing with time. I did that by varying the Amplitude, but i still can't get the reflected wave in the incident bar. The attachment is the inp file that i have did. Suppose the reflected wave(positive strain) is in opposite direction of the first wave produced in the bar. Unforturnately all the wave i obtained is in negatives strain.
Thanks for your reply and opinion.

  

RE: split hopkinson pressure bar

It appears the link does not work.

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