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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Design and fabrication of intelligent composites based on shape memory alloys
TL;DR: In this paper, the basic design concepts and fabrication of SMA composites, with an emphasis on SMA thin films and multilayer heterostructures, are discussed.
Journal ArticleDOI
Micromechanics modeling of composite with ductile matrix and shape memory alloy reinforcement
TL;DR: In this article, a quantitative micromechanics-based analysis on the role of microstructure and constituent properties in the overall behavior of shape memory alloy (SMA) composite is carried out.
Journal ArticleDOI
Martensite modulus dilemma in monoclinic NiTi-theory and experiments
Jifeng Wang,Huseyin Sehitoglu +1 more
TL;DR: In this article, the NiTi martensite moduli and its significance are investigated, based on the atomistic simulations, and the authors establish Voigt and Reuss bounds and Hill's estimate for macroscopic moduli for both the internally twinned states and single crystal (detwinned) states.
Journal ArticleDOI
Constitutive modelling and numerical simulation of multivariant phase transformation in superelastic shape‐memory alloys
TL;DR: In this article, the micromechanical constitutive modelling, algorithmic implementation and numerical simulation of polycrystalline superelastic alloys under multiaxial loading are discussed.
Journal ArticleDOI
Path Dependence of Shape Memory Alloys during Cyclic Loading
T. Jesse Lim,David L. McDowell +1 more
TL;DR: In this article, the Ni-Ti shape memory alloys (SMAs) behave pseudo-elastically above the austenite finish temperature (Af) with a nearly perfectly plastic character during the initial cycles of transformation.
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.