The result I got in the compression test of the homogeneous model that I worked with MAT_26 and MAT_01 cards continues to be fluctuating even though I have tried all the solutions that come to my mind.
How can I make this result smoother after the first peak force point? (Like a standard stress-strain chart)
@negativevolume Just a typical static compression.
We compress the specimen and then after the see densification curve stops the test and take the specimen.
So the type is not compress-hold I guess. Just compress in the active test time.
@tguckiran okay I'm just trying to get a sense of what your simulation is doing, because it looks like it's a cyclic compression test from that plot. Is the time in ms or seconds?
@negativevolume
I can explain the model more clearly as follows:
The model is a flat compression model, that is, no lifting procedure is applied after compression.
The 20 mm long model is crushed until it is compressed by 16 mm, crushing 1 millimeter in 1 millisecond.
So time unit is ms.
Please do a better job of explaining the context, the model set-up, etc.
That is a relatively better problem description. Thanks.
I think what we are looking at is wave propagation through the specimen i.e., waves bouncing around in the specimen showing up as acceleration at nodes (and, therefore, force wherever/however you are measuring it). You may have applied the boundary condition in an "abrupt" manner or you are missing damping from the model set-up. [Or, it could be something else entirely because I still don't understand the context and model set-up in detail.]