Johnson Cook Failure

- June 29, 2020 at 4:43 pm
  
  ateyeh2
  Subscriber
  
  Hello,
  
  I have been creating an explicit dynamics simulation. I implemented the Johnson Cook Failure model, but in my simulation, there are no visual effects. I have seen the "I want to see failure" post, although I don't know how that would pertain to the JC failure model specifically. Is there any way to visually see the effects of the failure model?
  
  Thank you
- June 30, 2020 at 1:14 am
  
  Wenlong
  Ansys Employee
  
  Hi,
  
  In Analysis Settings --> Eroding --> Turn on material failure. Then if the failure criterion is satisfied in JK model, the element will be deleted.
  
  Regards,
  
  Wenlong
- June 30, 2020 at 8:22 pm
  
  ateyeh2
  Subscriber
  
  Wenlong,
  
  Thank you for your answer. I have one more question. How would track the damage output for the JC failure model? Would I have to use a Fatigue Tool? If so, is this usable in explicit dynamics because for me, it is unselectable?
- July 1, 2020 at 7:25 pm
  Wenlong
  Ansys Employee
  You can insert a user-defined result and type "DAMAGE" in the definition. Here is the reference: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v201/en/exd_ag/ds_ex_mat_johncookf.html?q=johnson%20cook
  
  Regards,
  
  Wenlong
  
  ================ Note ====================
  
  If you have trouble opening the links I attached, please see the first useful link below
  
  Useful Links
- July 1, 2020 at 10:35 pm
  
  ateyeh2
  Subscriber
  
  I am sorry. I don't really get what you are saying. I created a user-defined result, and where it says "Expression", I typed "DAMAGE". Although, I am getting an error saying DAMAGE is not recognizable.
- July 2, 2020 at 2:08 am
  
  Wenlong
  Ansys Employee
  
  Sorry, I meant to say "Expression". And based on the worksheet (where all the available output are listed), it seems the correct expression is DAMAGEALL
- July 2, 2020 at 2:20 am
  
  ateyeh2
  Subscriber
  
  Thank you. It works now.
- December 22, 2022 at 6:52 am
  
  TUSHAR Verma
  Subscriber
  
  Hello can anyone tell me how to define Johnson cook material damage constant in ansys for steel 4340 as there is no option available to define this parameter only Johnson strength is there

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