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Thank you for the kind reply.
The procedure suggested is succesful.
The only remaining dubt regards the displacement entity: I am trying to stretch a 1x1x1 cube in the x direction by enforcing a displacement as a DOF1=3. Nevertheless, in the results I keep finding a displacement equal to 6.
Do you have any suggestion about this too?
Thank you.
I attach the model.
Assuming that you're using OptiStruct, you can run a NLSTAT analysis.
NL quasi-static assumes a gradual load increment for your loadings or enforced displacement, from 0 to 100% of your value.
So if you're using a SPCD as enforced displacement, it will go from zero to 100% of your displacement.
Now if you want a specific displacement over time, you can use a dynamic load, such as loadcollector TLOAD1 (if i'm not wrong, to be used as DLOAD in your loadstep).
In this case, you can specify a TABLED1 curve that defines your time varying load/displacent, combined with your SPCD.
TLOAD1 essentially defines a F(t) = SPCDvalue * your_table_over_time
Assuming that you're using OptiStruct, you can run a NLSTAT analysis.
NL quasi-static assumes a gradual load increment for your loadings or enforced displacement, from 0 to 100% of your value.
So if you're using a SPCD as enforced displacement, it will go from zero to 100% of your displacement.
Now if you want a specific displacement over time, you can use a dynamic load, such as loadcollector TLOAD1 (if i'm not wrong, to be used as DLOAD in your loadstep).
In this case, you can specify a TABLED1 curve that defines your time varying load/displacent, combined with your SPCD.
TLOAD1 essentially defines a F(t) = SPCDvalue * your_table_over_time