Modeling Nitinol | iMechanica

Submitted by Jam3s on Mon, 08/31/2009 - 09:05

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

Jim S. Olsen

Hi, Abaqus has a built-in

Hi,

Abaqus has a built-in material user subroutine for Nitinol (both umat and vumat). It is somewhat hidden, but it is there. It uses Auricchio's constitutive model, and cover only superelastic behaviour, not shape memory effect. To find guidelines for using the subroutine, I suggest that you check out My Support (simulia.custhelp.com) AnswerID: 1658 (or just search for nitinol). You need to sign up to use My Support by the way.

Regards

Jim S. Olsen

Tue, 09/01/2009 - 07:44 Permalink

Donald X. Chen

Alternatively, if you want

Alternatively, if you want to simulate pseudoelasticity and SME, you may use the

UMAT at http://smart.tamu.edu/SMAText/.

Wed, 09/09/2009 - 04:28 Permalink

MSts

Hello, I am also new in

Hello,

I am also new in the forum, and I also need to model Nitinol, for my Masters thesis.

I thought of starting with a simple model developed in MATLAB. Did anyone try that? What model is best for a bi-shape memory alloy? I am only aware of Brinson's constitutive model and the mentioned Auricchio's.

Thanks.

Marc

Thu, 11/05/2009 - 15:53 Permalink