Hi,
I am trying to model a reinforced concrete element in Abaqus. I have been running a couple of models for a few weeks. Recently, I tried to validate an new experiment but ran into this error, "The Plastic Strain At First Yield Should Be Set To Zero". For my steel material model, i used elastic = 29520ksi and for the plastic, i keyed in the yield stress followed by the plastic strain. At the first input, plastic strain is zero for the initial yield stress.
I would like to know why ABAQUS is the dominant FEM program (in terms of comments) in this forum? Why do you consider ABAQUS over ANSYS?
I have been using ANSYS for at least 8 years and I am very please with the capabilities of it. But I have not seen ABAQUS or used it. Beside, reading all the comments that are posted in imechanica, I feel like I am using the wrong FEM program.
Which are the advantage of ABAQUS over ANSYS?
Thank you,
Mario J . Juha
Hello,
I'm new in this forum and I've a problem that i can't resolve.
I need to model nitinol in Abaqus: I've red the documentation and many topic in Internet but I don't understand if I must use a VUMAT subrutine or it is sufficent the tool of user defined material in Abaqus/CAE. I need something simple like an elastoplatic behaviour with hysteresis given by the different states of austenite and martensite.
Thanks in advance,
Jam3s
Attention all iMechanicians! If you have a theme you would like to see in the Journal Club next year, please feel free to:
Thanks in advance!
Let us consider interaction of two atoms/molecules/particles. The reference distance between them corresponds to zero interaction force and zero stored energy. The interaction passes three stages with the increase of the distance. At the first stage the force increases proportionally to the increasing distance: the linear stage. At the second stage the force-distance relationship deviates from the linear proportionality: the nonlinear stage. At the third stage the force drops with the increasing distance: the separation or failure stage.
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The attached paper was recently accepted for publicaiton in Applied Physics Letters. Here we try to speculate on the origins of a type of electromechanical indentation size-effect. Although we have decent supporting evidence, I think that our assertions are still on the speculative side and hope that future experiments can shed further light on this.
I plan to submit the attached paper on quantum mechanical definition of stress in the next few weeks. Comments and feedback are welcome. Fair amount of work has been done on stress definition in the context of classical molecular dynamics (also attracting some controversies). In contrast, there appear to be several open issues in the quantum case. Hopefully, the attached paper provides a starting point.
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