Hi,

I am currently working on the implementation of some SMA-Models and have a question regarding the Brinson SMA-model [1]:

I can't find any information on the evolution of the internal phase transformation variables when sigma < sigma_cr_s & M_f < T < M_s. This region is usually called Band 6 (e.g. [2]). Has somebody an idea?

Thank you!

[1] L. C. Brinson: One-dimensional constitutive behavior of shape memory alloys: Thermomechanical derivation with non-constant material functions and redefined martensite internal variable, Journal of Intelligent Material Systems and Structures, 1993, pp. 229-242. (http://brinson.mech.northwestern.edu/documents/publications/1993_LCB_SMA_JIMSS.pdf)

[2] J.-H. Chung et al.: Implementation strategy for the dual transformation region in the Brinson SMA constitutive model, Smart Materials and Structures, 2006.