Error CDP, Plastic strains are negative, help!!
Error CDP, Plastic strains are negative, help!!
(OP)
Hi everyone,
I’m modelling the concrete damage plasticity, I’m trying to define the concrete compression damage and the concrete tensile damage through the damage parameters to each one (see the annex) I’m having the next error message:
DURING THE CONVERSION FROM CRUSHING TO PLASTIC STRAIN Abaqus FOUND NEGATIVE AND/OR DECREASING VALUES OF PLASTIC STRAIN. VERIFY THAT THE DEGRADATION DATA UNDER *CONCRETE Both (COMPRESSION/TENSION) DAMAGE IS CORRECT.
I calculate the plastic strain (through the ecuation defined in the Abaqus Manual) whit the values registers in my model, (see the file adjunct).
Someone can Help me ou explain me why this values of plastic strain are negative if the opened parameters are logical ????
Thanks.
I’m modelling the concrete damage plasticity, I’m trying to define the concrete compression damage and the concrete tensile damage through the damage parameters to each one (see the annex) I’m having the next error message:
DURING THE CONVERSION FROM CRUSHING TO PLASTIC STRAIN Abaqus FOUND NEGATIVE AND/OR DECREASING VALUES OF PLASTIC STRAIN. VERIFY THAT THE DEGRADATION DATA UNDER *CONCRETE Both (COMPRESSION/TENSION) DAMAGE IS CORRECT.
I calculate the plastic strain (through the ecuation defined in the Abaqus Manual) whit the values registers in my model, (see the file adjunct).
Someone can Help me ou explain me why this values of plastic strain are negative if the opened parameters are logical ????
Thanks.





RE: Error CDP, Plastic strains are negative, help!!
RE: Error CDP, Plastic strains are negative, help!!
Hi MRUsTGr88,
I am using the equations presents in the Documentation of the program through the section 23.6.3 Concrete damage plasticity, I do not understand why the both behaviors (compression and tension) provide negatives values of the Plastics Strains (see the annex picture). The trend of the curves has sense in the correctly analysis of the concrete to each behavior, and the damage parameters (dc) and (dt) are bigger according the strains increase.
I'm just ussing a static general step in this analysis, maybe I need to use a Riks Step because the behavior is decresing??
I appreciate any tip!
Regards,
RE: Error CDP, Plastic strains are negative, help!!
RE: Error CDP, Plastic strains are negative, help!!
Any tip, thanks!
RE: Error CDP, Plastic strains are negative, help!!
RE: Error CDP, Plastic strains are negative, help!!