General Mechanical

General Mechanical

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Explicit Dynamics on Concrete Cube giving linear behavior w/ crack softening

    • Korrenn Broaddus
      Subscriber

      I'm running a compression on a concrete cube test to failure. I am using the explicit material Concrete-L without changing any of its default properties. I have added the Crack Softening Failure with a fracture energy of 2.5 mj/mm2.

      I have a 150 mm cube of concrete in uniaxial compression along the y axis. I inforce a displacement at the top of the cube of -1mm wich should result in an average strain of -6.67e-3, however, the maximum strain given by explicit dynamics is -2.5e-3 despite showing a displacement of 1.0197 mm at the top of the cube. shows the results for a chart on the y axis stress strain obtained with a displacement of 1mm to the top of the cube. Shows linear behavior even at end with a maximum stress of -38.742 MPa and a maximum strain of -2.3864e-3 mm/mm

      Total deformation results showing 1.0197 mm displacement at top of cube

      My time step is 5e-4s I have no errosion controls on, my maximum energy error is 0.1.

      Also, How do i see the damage output, my solution does not allow me to input a damage solution into the tree. 

    • Chris Quan
      Ansys Employee

      You can click on Solution in Tree first and then click on Worksheet from the top toolbar to show the list of user-defined variables.

      From the list, you can right click on Effective Plastic Strain (EFF_PL_STN) and Principal Strain (P_STRAIN_3) to plot the results.

      You can also click on Damage to plot the contour plot of material damage.

       

      • Korrenn Broaddus
        Subscriber

        Thank you so much.

    • Korrenn Broaddus
      Subscriber

      This is the same model. I am getting a realy weird deformation at the top. How can I fix this? 

      The top of the cube mushrooming down

       

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