This work presents a finite-strain version of an established
three-dimensional constitutive model for polycrystalline shape memory alloys
(SMA) that is able to account for the large deformations and rotations that SMA
components may undergo. The model is constructed by applying the logarithmic
strain space approach to the original small-strain model, which was formulated
within the Generalized Standard Materials framework and features a refined
dissipation (rate) function. Additionally, the free energy function is
augmented to be more versatile in capturing the transformation kinetics. The
model is implemented into finite element software. To demonstrate the model
performance and validate the implementation, material parameters are fitted to
the experimental data of two SMA, and two computational simulations of SMA
components are conducted. The applied approach is highly flexible from the
perspective of the future incorporation of other phenomena, e.g.,
irreversibility associated with plasticity, into the model.

Este artículo explora los viajes en el tiempo y sus implicaciones.

Descargar PDF: