Journal ArticleDOI
One-Dimensional Thermomechanical Constitutive Relations for Shape Memory Materials
Chen Liang,Craig A. Rogers +1 more
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TLDR
In this article, a complete, unified, one-dimensional constitutive model of shape memory materials is developed and presented in the form of a thermomechanical model for shape memory alloys.Abstract:
The use of the thermoelastic martensitic transformation and its reverse transformation has recently been proposed and demonstrated for several active control ap plications. However, the present constitutive models have lacked several important funda mental concepts that are essential for many of the proposed intelligent material system ap plications such as shape memory hybrid composites.A complete, unified, one-dimensional constitutive model of shape memory materials is developed and presented in this paper. The thermomechanical model formulation herein will investigate important material characteristics involved with the internal phase transformation of shape memory alloys. These characteristics include energy dissipation in the material that governs the damping behavior, stress-strain-temperature relations for pseudoelasticity, and the shape memory effect. Some numerical examples using the model are also presented.read more
Citations
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Shape Memory Alloy in Tension and Compression and its Application as Clamping-Force Actuator in a Bolted Joint: Part 1 — Experimentation
TL;DR: In this paper, the behavior of Ni-55.7% wt Ti SMA in tension, compression, and at various temperatures is analyzed. And the effects of cycling, annealing, and friction on the mechanical behavior of this material in compression are discussed as well and, where applicable, compared to those of tension.
Journal ArticleDOI
Experimental study of a bio-inspired robotic morphing wing mechanism actuated by shape memory alloy wires
TL;DR: In this paper, a two degree-of-freedom (DOF) mechanism is designed and fabricated that is appropriate for morphing wing applications, which can undergo different two degrees of freedom so that the wing can have more efficient maneuvers.
Journal ArticleDOI
Nonlinear finite element simulation of shape adaptive structures with SMA strip actuator
Jin-Ho Roh,Jae-Hung Han,In Lee +2 more
TL;DR: In this paper, the thermomechanical responses of shape memory alloy (SMA) actuators and their applications in the shape adaptive structures combining strip SMA actuators are investigated.
Journal ArticleDOI
Constitutive model of shape memory alloys: Theoretical formulation and experimental validation
TL;DR: In this paper, a macroscopic model for nickel-titanium shape memory alloys (SMA) was proposed based on a specific critical stress-temperature diagram.
Journal ArticleDOI
Analytical study of the nonlinear behavior of a shape memory oscillator: Part I-primary resonance and free response at low temperatures
TL;DR: In this article, the response of a single-degree-of-freedom shape memory oscillator subjected to the excitation harmonic has been investigated, assuming a polynomial constitutive model to describe the restitution force of the oscillator.
References
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Journal ArticleDOI
Thermoelasticity, pseudoelasticity and the memory effects associated with martensitic transformations
TL;DR: In this paper, the pertinent thermodynamic relations, nucleation and growth and the influence of stress are considered and applied to thermoelasticity and the memory effects, and the effects of stress on memory are investigated.
Journal ArticleDOI
A thermomechanical description of materials with internal variables in the process of phase transitions
K. Tanaka,S. Nagaki +1 more
TL;DR: In this article, a model for thermoplastic materials in the process of solid-solid phase transition is presented, where the material is characterized by three different internal state variables: two internal variables which specify the crystallographic structural change during the plastic deformation, and a set of scalar internal variables describing the extent of phase transition.
Journal ArticleDOI
Some Applications of Shape-Memory Alloys
TL;DR: In this article, the shape memory effect and other interesting properties of shape memory alloys are discussed after a brief discussion of the nature of the shape-memory effect and some interesting properties.