General Mechanical

General Mechanical

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Transient Analysis – Archard Model – APDL commands

    • michele.russo11
      Subscriber

      Hello

      I'm trying to calculate the archard’s wear from a contact between a brake pad on a disc. I succeeded in the case of a block that slides linearly on a flat surface. Now with a pad that crawls along a circular trajectory, with the same settings, I can't get any information. To activate archard’s wear according I acted in the following way:


      1) In the contact tab I have inserted a command file:


      with those commands:

      keyopt,cid,5,1 !close gap with an auto contact surface offset
      keyopt,cid,10,2 !contact stiffness update

      H=10e-13
      K=1
      m=0,8
      n=1,3
      TB,wear,cid,,,ARCD
      TBDATA,1,H,K,m,n

      NLADAPTIVE,all,add,contact,wear,0.5
      NLADAPTIVE,all,on,all,all,1,,4
      NLADAPTIVE,all,list,all,all

      2) In the results tab I have entered a user defined result with the following settings:

      In the exercise with the  block sliding linearly it brings me results, while in the exercise with the sliding pad in a circular trajectory it reports the following errors:

      They are warnings, the exercise goes to convergence. I also have a note to make, if I don't activate Archard, in the same exercise, those warnings DOES NOT appear.  

    • Kaushal Vadnere
      Ansys Employee

      Hi, 
      Make sure that you've set 'Contact Data','General Miscellaneous' & 'Contact Miscellaneous' to YES. in the Analysis Settings > Output Controls 

      Let me know if this helps.

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