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  1. ami143

    Problem in damage model using VUMAT

    Hi all, I have implemented an isotropic damage model in VUMAT subroutine, and I would like to enquire about the problem in the code. The model is implemented with VUMAT subroutine and Mazars damage model was used. I always get strange results of the force-displacement curve. I am not sure about...
  2. ami143

    VSPRINC in VUMAT

    Hi All, I implemented a damage model in VUMAT subrooutine, and I would like to obtain tha maximum principal strain using the utility routine call vsprinc( nblock, s, eigVal, ndir, nshr ). In my code, I assigned the following utility routine : call VSPRINC(nblock,STRAIN,eigVal,NDIR,NSHR)...
  3. ami143

    Definition of tickness strain in VUMAT

    Dear All, I have implemented a damage model into user subroutine VUMAT, but I don't know how to define the tickness strain in the case of plane stress. Can anyone help me int this regard ? Thanks subroutine vumat( 1 nblock, ndir, nshr, nstatev, nfieldv, nprops, lanneal, 2 stepTime, totalTime...
  4. ami143

    Application of loading and unloading in Abaqus

    Thanks again for your response. What I need is to apply an isotropic damage model on 2D plate element under tensile loading. The element is restrained in one side and subjected to tensile load in the opposite side. The loading history should be varied with time; loading, unloading, and...
  5. ami143

    Application of loading and unloading in Abaqus

    thanks again for your respponse it is not important to me take into account inertia in my analysis. I tried to use amplitude in dynamic explicit but I did not get the required response for the damage model. Maybe there is problem of stability ?
  6. ami143

    Stability of damage model in VUMAT

    Dear All, how can one check the stability of a damage model implemented with VUMAT subroutine ? and how can we choose the appropriate values of the frequency in the field and history output requests ? Thanks
  7. ami143

    Application of loading and unloading in Abaqus

    Hi all, Thanly for your reply, can I use dynamic explicit for this type of loading ?
  8. ami143

    Application of loading and unloading in Abaqus

    Dear All, Can anyone please give me a method how to apply loading and unoading in Abaqus. I would like to apply an elastic model. I have for example 2D plate element, I want to apply a displaceemnt until it reaches for example 1 mm, after that unloading should be applied until the initial...

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