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As mentioned by FEA way, there is a supported superelastic material model for Abaqus so why are you looking for a SMA UMAT to use with Abaqus? What limitations does the currently supported superelastic model have? Given that you are looking online and assuming you really need a new SMA UMAT...

Those high quality meshes aren't recreated from medical imaging scans; they are built from 2D wire-frame designs and then mapped to 3D

Algorithms to compute centerlines using CG (computational geometry) libraries are available in various packages (CGAL, for sure). However, if you are not a power coder, I wouldn't recommend going down that pathway. A simpler route might be to look at 3DSlicer; it has a VMTK plugin for computing...

For a simulation of this level with explicit, I would want to start seeing data trickling into the output file within minutes and the job finished within a few hours. Implicit is a different beast altogether - It will take fewer time steps but the time step size can be much larger compared with...

1. 10^-10 is a very small time step. How long (real physical time) are you running the analysis? 2. Once you are past method development and have the analysis running, that time step will still take the job to run to completion. At this early stage when are developing a method, you'll end up...

Unrelated - It appears that you have imaged a stent and are using the scan (STL) as a starting point for your mesh - Is that correct? If yes, it would be much better to come up with a much more coarse mesh because the elements may be very small which kills the explicit time step. Also, what is...

Have you run explicit analyses before? Do you know if your stent is sufficiently constrained? Not sure why you have multiple rigid plates; usually, these sims have a cylinder with BCs specified in a radial coordinate system. Take a big step back and ensure: 1) BCs are applied as you expect in a...

...settle down before you switch the solver. Take that with a pinch of salt because I do not understand the physics you are trying to model. ********************************************************* Are you new to this forum? If so, please read these FAQs...

If I understand your description correctly, you have to let the dynamics stabilize/relax before turning off the acceleration abruptly. ********************************************************* Are you new to this forum? If so, please read these FAQs: http://www.eng-tips.com/faqs.cfm?fid=376...

...stiffness matrix so an unsymmetric solver would be worth giving a shot but, since you take a computational hit, the RoI depends on the problem. ********************************************************* Are you new to this forum? If so, please read these FAQs...

...5) Do you have someone to talk to? A mentor, perhaps? Do you have other sources of support? Maybe something to talk about with your manager. ********************************************************* Are you new to this forum? If so, please read these FAQs...

...progress to your supervisor and not wasting time setting up the environment to do coding in. Its tough but has the advantage of being realistic. ********************************************************* Are you new to this forum? If so, please read these FAQs...

...in the documentation? If not, then you might want to give that a try. If that fails, then odds are you have software compatibility issues to fix. ********************************************************* Are you new to this forum? If so, please read these FAQs...

...predictions or an automated workflow in which I run an array of scenarios and get statistical forecasts for the quantities of interest? ********************************************************* Are you new to this forum? If so, please read these FAQs...

...results ought to be from the analytical expression and compare the prediction with simple numerical tests (single element and patch of elements). ********************************************************* Are you new to this forum? If so, please read these FAQs...

...after reading his book, I found out that MIT threw an excellent couple of lectures series by him up on YouTube. I found those really valuable. ********************************************************* Are you new to this forum? If so, please read these FAQs...

...ultimately hoping to achieve? I am asking because, in general, as you refine elements or as deformation occurs, the element quality will change. ********************************************************* Are you new to this forum? If so, please read these FAQs...

I did not mean to suggest you will need to code a subroutine. ********************************************************* Are you new to this forum? If so, please read these FAQs: http://www.eng-tips.com/faqs.cfm?fid=376 http://www.eng-tips.com/faqs.cfm?fid=1083

...chip formation to have more to do with material and element subroutines and perhaps even post-processing than the numerical reference frame. ********************************************************* Are you new to this forum? If so, please read these FAQs...

...about the feature very quickly. Be sure to have the relevant documentation open on the side so the 'theory' and practice together make sense. ********************************************************* Are you new to this forum? If so, please read these FAQs...