Hi all,
Second question on the same or so topic.
I am working on subroutines (UMAT and others) for Abaqus to implement Tsai-Wu failure criteria for non-composite structures (I work on long bones such as the femur).
To my understanding, strains and stresses are calculated at each integration point and so is every other variable that I may use, such as state variables or my failure criteria.
To correctly define failure, I need to average the failure criteria values (that are at each integration point) over each whole element, and that is where I get stuck coding for. I would like to mimic an element deletion feature by setting Young modulus to a negligible value to avoid completely deleting an element.
I used an UEXTERNALDB subroutine to import the connectivity table hoping to use it to get element-scale values (averaged).
How should I implement that calculation ? Is there a way to calculate everything at the nodes ?
Thanks for your help.
Hi Ahmad Bakir
Thanks for your reply ; could you provide a bit more insight on the use of the calculator ?
I do have the value of my failure criteria stored in a state value for each integration point but since I would like to modify the mechanical properties of an element during the simulation if it exceeds the failure criteria and since, to my knowledge, the calculator is called at the end of the simulation, I still feel stuck on that issue.
I greatly appreciate your help
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