The previous study by thefor the finite element analysis of superelastic, large deformation behaviors of one-dimensional shape memory alloy (SMA) devices is extended to the magneto-superelastic analysis of ferromagnetic shape memory alloy (FSMA) devices. The commercial code ANSYS/ Emag for magnetic analysis is combined with the SMA superelastic analysis program developed by the authors. The num...

A shape memory device, and thus the alloy, when not operating is generally held in the martensitic condition. Also the shape memory effect depends on the retransformation of the martensite to the parent phase (i). Use of an alloy in a temperature controlling device, therefore, demands reliability and reproducibility of this retransformation temperature with shape memory cycles and more particul...

Antagonistic shape memory actuated structures exploit opposing pairs of one-way shape memory alloy (SMA) linear actuators to create devices capable of a fully reversible response. Unlike many conventional reversible SMA devices they do not require bias force components (springs) to return them to their pre-actuated configuration. However, the repeated use of SMA antagonistic devices results in ...

The field of smart materials and structures has evolved in the last 10 years to the point of viability for commercial mass-production industries. A good example of this is the automotive industry where there has been a 600% increase in patent applications. While the fundamental science is present for many smart materials such as shape memory alloys or piezoelectrics, there have been only a few ...

Impact responses of rectangular composite plates with embedded shape memory alloy (SMA) wires are investigated in the present research. The plate is assumed to be placed in a thermal environment; so that in contrast to the available researches in the field, the shape memory and ferroelasticity effects have to be considered also in addition to the superelasticity. The governing equations are der...

Starting from a general Landau-type 3D model for the shape memory alloy dynamics we have developed a new mathematical \slow manifold" model that allows us to describe eeectively the main features of the thermomechanical behaviour of CuAlNi alloys. A robust numerical procedure, developed in our earlier papers for the Falk model, has been generalised to this case. Results of the mathematical mode...

Five high entropy alloys with shape memory effect or superelastic were prepared by cold crucible melting to understand the of their chemical composition on transformation temperatures. The microstructure and phases at room temperature investigated optical scanning electron microscopy. calorimetric study these is employed analyze reversible from austenite martensite determine temperatures five a...

The study of polycrystals of shape-memory alloys and rigid-perfectly plastic materials gives rise to problems of nonlinear homogenization involving degenerate energies. This paper presents a characterization of the stress and strain fields in a class of problems in plane strain, and uses it to study examples including checkerboards and hexagonal microstructures. Consequences for shape-memory al...

Titanium-based shape memory alloys undergo a cubic to orthorhombic martensitic transformation (β to α’’ martensite). A new easy way operating as a reconstruction of the parent microstructure is used from electron backscattered diffraction. It is shown that the electron backscattered patterns of the martensitic microstructure can be directly indexed as the parent phase in order to obtain the cor...