the ductile damage 1

[NEROOO]

Hi,

I'm doing fracture analysis with the "ductile damage", and have the followed issue:

if the "fracture strain, stress triaxiality, strain rate" are given in a series of data along the curve in literature, there will be hardly element deletion;

if they are given in only five or six sets of data, there could be element deletion;

also the smaller the fracture strain given, the easier to have deletion.

the damage evolution is set as zero.

So how does the number and the value of the dataset in "ductile damage" influence the deletion?

Thanks for your help!

 

[FEA way]

If you specify multiple data sets for ductile damage initiation criterion then Abaqus will assume that equivalent plastic strain at the onset of damage depends on the stress triaxality, strain rate, and, in some cases, temperature. Make sure that the data from literature is defined correctly and that applied loads are enough to cause damage. You can request the output variable DUCTCRT (damage initation criterion). If it's greater or equal 1 then the criterion is met at the specific location.

 

[NEROOO]

thanks @FEA way !

So if I give multiple sets of data , the fracture strain has on affect to fracture or deletion, but the traxiality?

What I'm still not clear is, what is the difference if I only give one row of data and multiple rows? is that one row enough to determine the fracture and deletion?

THanks!!