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  1. W00dman

    Element Matrix Output in Elastic NLGEOM Analysis

    Answering my own question... In a non linear analyses in Abaqus, the Newton solver used updates the reference configuration at every iteration. The equation that is solved is no longer K*U-F but K*U - F = Ktan*(deltaU) with Ktan the tangent stiffness matrix and deltaU the last variation on the...
  2. W00dman

    Solution Performance in Contact Problem

    The difference in CPU time could also come from the contact formulation that is used... Abaqus/Standard uses a lagrangian multiplier formulation by default which doubles the amount of unknowns in the problem. You can try with an Augmented Langragian formulation (all versions), or a penalty...
  3. W00dman

    Element Matrix Output in Elastic NLGEOM Analysis

    Hello, After doing an elastic, static NLGEOM analysis on my model, I recuperate the elementary matrices, nodal displacements and efforts. After assembling the elements, and doing K*U - F I don't get zero. Whereas if the analysis is linear the sum is equal to zero. I have a feeling it's...
  4. W00dman

    Matrix class templates

    Hi there, I'm beginning with C++ and looking for matrix class templates. I'll probably have to handle large matrix (1000*1000), and there are quite a few different templates that are free. Which one is the easiest and most efficient for handling large systems (dynamic memory allocation)? What...
    • W00dman
    • Thread
    • Replies: 1
    • Forum: C++
  5. W00dman

    From Abaqus to Matlab

    Hi, Is there any way to share Abaqus FE Matrix data with Matlab? (Without writing the matrix with *ELEMENT OUTPUT MATRIX) Thanks

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