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  1. akabarten

    USDFLD subroutine not called in abaqus

    Hi, Abaqus converts all names to upper case and removes all white signs. In your case you need use: if (cmname .eq. 'MATERIAL-1') then Bartosz VIM filetype plugin for Abaqus https://github.com/gradzikb/vim-abaqus
  2. akabarten

    error #6236 for user defined function

    Hi, FORTRAN layout is spilt into declaration and executable section. Declaration section is first and executable second, you must not mix these two sections. The executable section starts after first executable line and after it you must not put any declaration lines. Here is executable...
  3. akabarten

    Plw the following usf code,what is the real problem?

    Hi You defined AREA variable as parameter it means the variable never change value and always will be 0.0. PARAMETER(RADIUS=0.15D0,AREA=0.D0) but next you try to change AREA value AREA=AREA+AREA1 Bartosz VIM filetype plugin for Abaqus https://github.com/gradzikb/vim-abaqus
  4. akabarten

    Can I give a name to state variables in the contour legend in ABAQUS?

    Hi You can define name and description for each state variable. ** *DEPVAR ** number of variables 3 ** variables list 1, outputKey1, outputDescription1 2, outputKey2, outputDescription2 3, outputKey3, outputDescription3 ** Bartosz VIM filetype plugin for Abaqus...
  5. akabarten

    USDFLD subroutine ABAQUS

    Hi, It you prefer to work directly with abaqus inputdecks in text editor the plugin make work easier. However it is for VIM text editor so you have to know it. Regards, Bartosz VIM filetype plugin for Abaqus https://github.com/gradzikb/vim-abaqus
  6. akabarten

    USDFLD subroutine ABAQUS

    Hi, Your example is incorrect and interpolation can not be done in this case. From Abaqus documentation (21.1.2 Material data definition, Interpolation of material data) For three field variables with values in range from 0 to 2 we must define lines: ** ** 50 0 0 0 30 1 0 0 20 2 0 0 ** 50 0...
  7. akabarten

    Using two different USDFLD subroutines in a problem

    Hi, You must not use more than one USDFLD subroutine. You can test your material name with CMNAME variable to do different operation for each material in your model. See following thread for more info: http://www.eng-tips.com/viewthread.cfm?qid=314887 Regards, Bartosz VIM filetype plugin...
  8. akabarten

    USDFLD-Modelling functionally graded materials in ABAQUS

    Hi, I ran your model and I noticed FV1 vary between value of 145.0 and 375.0. With your material definition it make sense only when FV1 vary from 1.0 to 2.0. Abaqus use constant extrapolation outside field variable range so any value above 2.0 will use E=2e+09. Please check your equation...
  9. akabarten

    USDFLD-Modelling functionally graded materials in ABAQUS

    Hi, Could you share your inputdeck and subroutine, please? I will take a look for it. Regards, Bartosz VIM filetype plugin for Abaqus https://github.com/gradzikb/vim-abaqus
  10. akabarten

    Linking Abaqus 6.14-5 with Intel Parallel XE 2013 with VS 2010

    Hi, It looks like your UMAT is wrong, to be more precise FORTRAN does not like line 14 "4 JSTEP(4)". If you compare your UMAT arguments with documentation you will find a mistake. One before the last argumnent is JSTEP not KSTEP. SUBROUTINE UMAT(STRESS,STATEV,DDSDDE,SSE,SPD,SCD, 1...
  11. akabarten

    ABAQUS SUBROUTINE DLOAD NOEL

    Hi Jungao >>> Is it correct that we need to declare 'save' in the beginning, then they are saved as global variables By default all variables used in subroutine are not controlled after call. It means part of memory where your variable is stored can be overwrite by any other program or Abagus...
  12. akabarten

    ABAQUS SUBROUTINE DLOAD NOEL

    Hi Jungao, I have never used URDFIL subroutine so I know nothing about it. But as long you are ok with displacement and velocity of integration points you can evaluate them in DLOAD. ! keep values in memory save rPrevCOORDx save rPrevCOORDy save rPrevCOORDz save rPrevTIME ! disp =...
  13. akabarten

    ABAQUS SUBROUTINE DLOAD NOEL

    Hi Jungao It is good to hear that it is starting to work as you expecting. One advice from my side. You really should not depend on "187 offset" between user and internal ids. It's probably true only for this one model, or maybe not. It is high likely with different Abaqus version/number of...
  14. akabarten

    ABAQUS SUBROUTINE DLOAD NOEL

    Hi Jungao, >>> I have also attached the .dat file for your information There is no attachment. >>> I suppose when ABAQUS call the subroutine DLOAD, it's actually looping in main function ABAQUS to define F for each element integration point Yes. >>> the size of the loop is (element...
  15. akabarten

    ABAQUS SUBROUTINE DLOAD NOEL

    Hi Jungao, To be honest I am still confuse about your load. I understand that each beam element will get different load. The load is calculate outside DLOAD subroutine and next stored (by initialization and/or reading from external file) in FY array. The FY array structures is: FY(1) : load for...
  16. akabarten

    ABAQUS SUBROUTINE DLOAD NOEL

    Hi Keith, Make sense for me. You can check it in easy way with "WRITE(6,*) NOEL,NPT,JLTYP". It transfers only elements with applied user load, so in your case all elements in LOADELEM elset. If you are using flat inputdeck and still id of elements does not fit to inputdeck maybe...
  17. akabarten

    ABAQUS SUBROUTINE DLOAD NOEL

    Hi Keith, Are using part and assembly inputdeck structure or flat inputdeck structure? With parts and assembly Abaqus use user and internal node/element numbers. Abaqus before start analysis renumber whole model from user to internal ids. In inputdeck you have user ids and in NOEL you have...
  18. akabarten

    Modeling stress dependency of stiffness with USDFLD

    Hi David, Initial step always initialize only first step, doesn't matter what type it is (static, dynamic, ...). But all results are passed to another step. So if you have first step which doesn't change your initial values you will get them also in second step. Sounds good, you can use python...
  19. akabarten

    Modeling stress dependency of stiffness with USDFLD

    Hi, I have no experience with FV initialization but in documentation is information that values are read from output database so I understand from odb file. Try to save FV outputs to odb (*NODE OUTPUT) and than use *INITIAL CONDITION, FILE=... I have two ideas: 1. USDLD and 2 steps I would...
  20. akabarten

    Modeling stress dependency of stiffness with USDFLD

    Hi, I do not think the problem is related to full integrated element type you are using. Each integration point is treated separately in you example so it should not be a problem. Is there any rule for initial distribution which can be describe with an equation? One more point, are you sure...

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