Unable to view microplane damage in workbench

Hello everyone, I am trying to view concrete microplane damage using microplane model in ansys workbench R2 2020, But the damage is only available for 1st step of solution, whenever i try to plot other steps, the solution information "Error "The requested MPDP data is not available."" . I am using following commands

/SHOW,PNG

ESEL,ALL

Set,,last

/VIEW,1,1,1,1

PLNSOL,MPDP,TOTA

PLNSOL,MPDP,COMP

PLNSOL,MPDP,TENS

I have also enabled outres,all,all in element command menu.


Kindly help me out.

Answers

  • jjdoylejjdoyle PittsburghMember

    I tested your post processing script in MAPDL on simple test input and I am able to extract these results.

    Can you compare your ds.dat file in your WB-Mechanical working directory to the test script below?

    fini

    /clear

    /prep7  

    et,1,solid185

    !Material

    E1=36500e6

    v=0.2

    fc = 26e6

    ft = 2.27e6

    !* Material Properties

    mp,ex,1,E1 

    mp,nuxy,1,v  

     ! 

    k=fc/ft*1.17  

    k0=(k-1)/(2*k*(1-2*v))

    k1=k0

    k2=3/k/(1+v)/(1+v)

    eta = ft/E1

    !Microplane Material Model

    tb,mpla,1,1,6,

    tbdata,1,k0,k1,k2        

    tbdata,4,eta,0.96,100     

    type,1

    mat,1

    N,1, 0.0, 0.0, 0.0

    N,2, 0.0, 1.0, 0.0

    N,3, 1.0, 0.0, 0.0

    N,4, 1.0, 1.0, 0.0

    N,5, 0.0, 0.0, 1.0

    N,6, 0.0, 1.0, 1.0

    N,7, 1.0, 0.0, 1.0

    N,8, 1.0, 1.0, 1.0

    E,1,5,7,3,2,6,8,4

    nsel,s,loc,x,0

    d,all,ux

    nsel,s,loc,y,0

    d,all,uy

    nsel,s,loc,z,0

    d,all,uz

    allsel

    nsel,s,loc,x,1

    d,all,ux,0.004

    allsel

    fini

    /solu

    antype,0

    autots,on

    nsubst,10,100,10

    outres,all,all

    solve

    fini

    /post1

    set,,last

    PLNSOL,MPDP,TOTA

    PLNSOL,MPDP,COMP

    PLNSOL,MPDP,TENS

  • edited October 21

    @jjdoyle Results can be viewed only for 1st step, if we have multiple steps then the results can't be obtained for 2,3,4...n steps.

    can you also tell me from where did you obtain this relation? "k=fc/ft*1.17"

    I am trying to calibrate a M-25 concrete by kent-park using microplane  model but unable to set the yield strain properly, can you tell me how to calibrate the k0,k1,k2 parameters properly?

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