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  1. JayEngSci

    Stress values different for VUMAT and Abaqus built-in material

    Hi! I'm running simulations of composite laminates under impact loading. An example of VUMAT is uniFiber.f. https://cnzhx.net/fe/2015/05/09/an-example-of-vumat-using-hashin-criteria-for-composites/ At the first step, I only conduct linear elastic analysis without any damage. The element used is...
  2. JayEngSci

    MPC constraints

    Yes, just found this: '*PREPRINT, ECHO=YES'.
  3. JayEngSci

    MPC constraints

    The name of 'Assembly' can be modified.
  4. JayEngSci

    MPC constraints

    Thank you. The number of terms in each line should be more flexible. I also try putting *MPC under *Part by introducing additional nodes which interact with other parts. But the results will be different.
  5. JayEngSci

    MPC constraints

    When I used *MPC with more than 15 nodes in the data line, the number of characters in one line will exceed 256. The node set I considered is from instances so that Abaqus will automatically add a prefix of 'Assembly_'. I tried fewer nodes one line. But it seems Abaqus will ignore the...
  6. JayEngSci

    Dynamic analysis with linear and quadratic element

    Yes. The result by the quadratic element should be correct. The material is homogeneous and the peak value should be constant.
  7. JayEngSci

    Dynamic analysis with linear and quadratic element

    Linear: T2D2; Quadratic: T2D3
  8. JayEngSci

    Dynamic analysis with linear and quadratic element

    I guess this may be caused by the mesh size. When I refined the mesh size for the case of linear element, the decay is smaller. Any guidelines on the mesh size for such problem?
  9. JayEngSci

    Dynamic analysis with linear and quadratic element

    Hi, I am simulating a bar (Abaqus implicit dynamic) which is loaded at the right end while fixed at the left end. The displacement imposed at the right end is a cosine function, which lasts for one period. The results were different when I used linear and quadratic elements. What may be the...
  10. JayEngSci

    Transient heat transfer

    That's true. There is a relationship between the minimum usable time increment and the element size. Thanks.
  11. JayEngSci

    Transient heat transfer

    Hello, I am running a transient heat transfer simulation with a quadratic element (DC2D8). The temperature of the left edge is fixed at 0 while the right edge increases gradually to 45. But I found the temperature of the left half is lower than 0. Is this reasonable?

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