To model chip separationin machining process,JC damge model needs to define five parameters named, d1, d2, d3, d4 and d5. I have been searching for those parameters for 52100 but i could not get the values of paramerters
Suha it is the ratio of "Plastic fracture strain" to "von mises equivalent plastic strain". When the value of ratio reaches a value of 1 then is considered that the damage has occured.