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  • Users: tulbo
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  1. tulbo

    USDFLD GIVES INACCURATE VALUES OF STRAIN!

    Hi, I urgently need some with my subroutine in USDFLD. I am modelling a stiffness dependency on mean stress (E= f(s11+s22+s33)). I enter in a table the values of Young's modulus and the related field variable (pressure). I have tried many things but somehow the subroutine gives incorrect...
  2. tulbo

    ELEMENT STIFFNESS MATRIX

    Hi, I am using USDFLD and a solution dependent field variable to specify the variation of elastic modulus (fieldv=pressure=s11+s22+s33 in my case). Then how is the element stiffness matrix computed at beginning of each load increment? The material properties are a function of the field...

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