iterations

[Newton-Raphson Iteration in Transient Thermal Analysis

Submitted by shrimad on Mon, 12/07/2009 - 23:01

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Hi,

I have been quite confused about this for sometime now. It
has not been mentioned clearly in the books/references that I have
looked into.

In transient thermal analysis with implicit scheme
or the Crank Nicolson scheme, are there Newton Raphson iterations based
on the residual vector in every time-step?

Thanks,

Shriram

--

Process Engineer

Moore Nanotechnology Systems

Keene, NH - 03431

Iterations in VUMAT

Submitted by cece83 on Thu, 12/03/2009 - 17:23

Dear all,

I' m trying to make a model in VUMAT for shape memory alloy based on Lagoudas 's thermomechanical constitutive model. It seems that It's necessary an iteration to evaluate the thermoelastic prediction.

My questions are : is it possible to use an iterative loop in the VUMAT or it's better to avoid it??Could someone suggest me a different way so that I can avoid the iterative loop?

Many thanks,

Cece

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