hape Memory Effect Behavior of NiTi Torque Tubes in Torsion (1393/3/12)
|
n order to simulate the torsional behavior of NiTi torque
tubes, two different 3D thermo-mechanical constitutive models
are utilized. Firstly, an available incremental constitutive model
is used in which a return mapping algorithm is implemented to
numerically calculate the strains for any applied stresses.
Secondly, Microplane theory is employed based on which 1D
constitutive laws are considered for associated stress and strain
components on any arbitrary plane passing through a material
point followed by a homogenization process to generalize the
1D equations to a 3D macroscopic model. Both of the
constitutive models are implemented in ABAQUS by
developing UMAT.
|