The electric resistance, sensitively dependent on the electronic structure and currently used to detect transformation temperatures in shape memory alloys, deserves attention also in the stress transformation domain. In fact, the electric resistance has already been investigated under increasing stress in the martensitic phase of several shape memory alloys: in this case a linear relationship i...

Abstract Here mechanical metamaterials with shape memory alloys (SMA) are assembled to create a new kind of artificial muscle driven by response temperature changes that generates pulling, pushing, and structurally coded sequentially forces. The deformation force unit can be geometrically tuned, different forces generated two units arranged in parallel series. SMA sheets orientations controllin...

Abstract The thermomechanical coupling in shape memory alloys (SMAs) provides an effective mechanism of vibration damping by a cyclic structural phase transition. Here, we present simulations for active SMA damper device based on polycrystalline film materials, which via the one‐way effect is exploited. We apply extension previously reported superelastic model, that combines transition state ki...

In this chapter, a three-dimensional phenomenological constitutive model for the simulation of shape memory alloys is introduced. The proposed macromechanical model is based on microplane theory. Microplane approach is chosen to have limited material parameters in that all of those are measurable by simple tests. User material subroutine is developed to implement the proposed model in a commerc...

This work introduces a novel concept of modular, shape-adaptable sandwich panel with distributed actuation system based on shape memory alloys (SMA). The consists modular arrangement rigid cells connected compliant active joints. Each joint hosts SMA wire, which can be controlled independently, enabling the to achieve multiple shapes and complex curvatures single design. A numerical model actua...

Shape memory alloys (SMAs) are being increasingly applied as thermally driven actuators. The commercially available SMA elements, however, frequently contain stress risers, either due to internal or surface defects the required component shape. Stress risers represent a potential danger for preliminary fatigue failure of such actuators but its actual mechanism is not very clear. This paper pres...