General Mechanical

General Mechanical

stress calculation in plastic region

    • 223017979
      Subscriber

      i have made a simple geometry of (1*1*1)mm cube in which bottom face is made fixed and a tensile force is applied on top face.

      yield point is 650 MPa for material and a tensile force of 700 N is applied in time step of 2 i. in elastic region it is working fine but in plastic region equivalent stress is coming out to be 722 MPa and principal stress in Y direction is 818 MPa .

      but since force applied is 700 N so in plastic region also stress coming out should be equal to 700 MPa only which is not there.

      i have used bilinear kinematic hardening and these stress values are for central node of cube.

    • peteroznewman
      Subscriber
      Delete the Fixed Support, it is adding stress by constraining the X and Z directions where Poisson's Ratio induces stress when tension is applied in the Y direction.
      On the bottom face, add a Displacement of Y=0 and leave X and Z Free.
      On the dark side face, add a Displacement of Z=0 and leave X and Y Free.
      On the light side face, add a Displacement of X=0 and leave Y and Z Free.

    • 223017979
      Subscriber
      thanks . got correct answers now in ansys
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