There are two rupture criteria used by Advanced Material Exchange. By default, the MCT rupture criteria is used to predict the initiation of damage. Advanced Material Exchange stores the parameters associated with this criterion in the .sif file. The HIN file can be used to adjust the parameters of the MCT rupture criterion, or to switch to the Maximum Effective Stress rupture criterion.
*DAMAGEINITIATION, TYPE=[MCT/MAXEFFSTRESS] A1,A2,A4 / maxeffstress
where TYPE=MCT is used to modify the coefficients of the MCT rupture criterion and TYPE=MAXEFFSTRESS is used to switch to the Maximum Effective Stress rupture criterion. If TYPE=MCT is used, you must specify the coefficients A1, A2, and A4 on the data line. If TYPE=MAXEFFSTRESS, you must specify the maximum allowable effective stress on the data line. The *DAMAGEINITIATION keyword must be preceded by a valid *MATERIAL or *ENVIRONMENT keyword.
Consider the examples below which demonstrate the use of each option.
*MATERIAL, NAME=CA-PLASTIC-1 *DAMAGEINITIATION, TYPE=MCT 0.0026, 0.0036, 0.0025
*MATERIAL, NAME=CA-PLASTIC-1 *DAMAGEINITIATION, TYPE=MAXEFFSTRESS 150.0