lamjuv's blog

hello everybody.

hello everybody

i want to know what is the meaning of back stress and its effect on drucker prager yield criterion for viscoelasticity materials

thank you 

hello everybody

when i am trying to make a creep analysis using abaqus and it is the first time i do that

when i submit the job, there is an error and a message appear this message is:

ERROR: DEGREE OF FREEDOM 11 AND AT LEAST ONE OF DEGREES OF FREEDOM 1 THRU 6 

           MUST BE ACTIVE IN THE MODEL FOR *COUPLED TEMP-DISP. CHECK THE 

           PROCEDURE AND ELEMENT TYPES USED IN THIS MODEL.

 ***NOTE: DUE TO AN INPUT ERROR THE ANALYSIS PRE-PROCESSOR HAS BEEN UNABLE TO 

i am new in using abaqus and also in materials analysis fatigue

so i want to use stress ratio R=-1 and R=0 for analysis an aluminium material

so how to define this in abaqus

is it to take in amplitude (periodic) and define A0 and t0 w also the values of A B? IS THIS CORRECT OR NO

thank you