Analysis of the Geometric Nonlinear Effect on the Mechanical Behavior of Pseudoelastic Shape Memory Alloy Helical Springs

This work aimed to produce mechanical components of nickel–titanium shape memory alloys using investment casting processes. Then, in order to validate processing, different designs of nickel–titanium shape memory alloy components as staple implants, Belleville springs, meshes, helical springs, screws and hexagonal honeycombs were produced and submitted to thermal and mechanical characterization. Thermoelastic martensitic transformation of the nickel–titanium shape memory alloy parts was determined by differential scanning calorimetry and electrical resistance with temperature, while the superelastic behaviour was verified by cyclic tensile and compression tests. It has been demonstrated that the employed investment casting processes are suitable to manufacture nickel–titanium shape memory alloy mechanical components with simple and complicated designs as well as functional properties related to phase transformation and superelasticity.

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Analysis of Niobium Precipitates Effect on the Thermo-Mechanical Behavior of a NiTiNb Shape Memory Alloy

ICOMAT ◽

10.1002/9781118803592.ch52 ◽

2013 ◽

pp. 357-364

Author(s):

Boris Piotrowski ◽

Arnaud Duval ◽

Tarak Ben Zineb ◽

Etienne Patoor ◽

Andre Eberhardt ◽

...

Keyword(s):

Shape Memory Alloy ◽

Mechanical Behavior ◽

Shape Memory

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A combined analytical, numerical, and experimental study of shape-memory-alloy helical springs

International Journal of Solids and Structures ◽

10.1016/j.ijsolstr.2010.10.026 ◽

2011 ◽

Vol 48 (3-4) ◽

pp. 611-624 ◽

Cited By ~ 57

Author(s):

Reza Mirzaeifar ◽

Reginald DesRoches ◽

Arash Yavari

Keyword(s):

Experimental Study ◽

Shape Memory Alloy ◽

Shape Memory ◽

Helical Springs

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Numerical and Experimental Investigation on Electro-Thermo-Mechanical Behavior of NiTi Shape Memory Alloy Wires

Iranian Journal of Science and Technology Transactions of Mechanical Engineering ◽

10.1007/s40997-018-0183-8 ◽

2018 ◽

Vol 43 (S1) ◽

pp. 621-629 ◽

Cited By ~ 2

Author(s):

Pejman Shayanfard ◽

Mohmoud Kadkhodaei ◽

Amin Jalalpour

Keyword(s):

Experimental Investigation ◽

Shape Memory Alloy ◽

Mechanical Behavior ◽

Shape Memory ◽

Niti Shape Memory Alloy

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Mechanical behavior of nanostructured TiNi shape memory alloy with different grain size

Materials Today Proceedings ◽

10.1016/j.matpr.2017.04.081 ◽

2017 ◽

Vol 4 (3) ◽

pp. 4841-4845 ◽

Cited By ~ 2

Author(s):

Natalia Resnina ◽

Sergey Belyaev ◽

Vitali Pilugin ◽

Diana Glazova

Keyword(s):

Grain Size ◽

Shape Memory Alloy ◽

Mechanical Behavior ◽

Shape Memory ◽

Different Grain Size

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Analysis of Time Response of Shape Memory Alloy Actuators Modular System

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.147-149.726 ◽

2009 ◽

Vol 147-149 ◽

pp. 726-731

Author(s):

Dan Mândru ◽

Ion Lungu ◽

Simona Noveanu ◽

Mihai Olimpiu Tătar

Keyword(s):

Shape Memory Alloy ◽

Shape Memory ◽

Heating Time ◽

Time Response ◽

Modular System ◽

Resistive Heating ◽

Helical Springs ◽

Active Elements ◽

Compact Design

The first part of the paper treats the general problems concerning the shape memory alloy actuators and their operation principle. Then, our work referring to the developing a modular family of linear and rotational actuators, realized in many typo dimensions, in a compact design, with facile connection with the actuated mechanisms and supplying module is presented. The active elements of these actuators are shape memory alloy wires, ribbons and helical springs. The influence of the geometry of the active elements on the time response is studied. The most important solutions to reduce the resistive heating time of active elements and to improve the time response on cooling are identified.

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