scholarly journals Calculation of three-dimensional stationary magnetic fields of actuators with shape memory effect using point magnetic moments

2019 ◽  
Author(s):  
A. L. Balaban ◽  
Y. A. Bakhvalov ◽  
V. V. Grechikhin
Keyword(s):  
Magnetic Fields ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Magnetic Moments ◽  
Three Dimensional

A three-dimensional phenomenological model for shape memory alloys including two-way shape memory effect and plasticity

2019 ◽  
Vol 136 ◽  
pp. 103085 ◽  
Author(s):  
Giulia Scalet ◽  
Fabrizio Niccoli ◽  
Cedric Garion ◽  
Paolo Chiggiato ◽  
Carmine Maletta ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Phenomenological Model ◽  
Three Dimensional

scholarly journals Fundamentals of the mechanical assembling “bottom-up” of individual nanoobjects and nanodevices for the investgations of the quantum non-local phenomena, nanoelectronics and biomedical diagnostics.

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
V.V. Koledov ◽  
◽  
V.G. Shavrov ◽  
S.V. von Gratovsky ◽  
P.V. Lega ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Carbon Nanomaterials ◽  
Field Effect Transistors ◽  
Spin Injection ◽  
Three Dimensional ◽  
Functional Materials ◽  
Basic Research ◽  
Bottom Up

In this work we give an overview of researches, conducted in the framework of the project RFBR-BRICS, together with groups from Brazil, Russia, India, China and South Africa on the development of new technology nanoassembly «bottom-up» various devices for nanoelectronics, nanosensors, biomedicine and basic research based on the use of new functional materials with phase transitions and new physical effects. The Russian group carried out work on improving the nanomanipulation system based on nanotweezers made of Ti2NiCu alloy with shape memory effect. A new design of the control system is proposed, which reduces the control power of the resistive heater and reduces the uncontrolled drift of the nanotweezers by up to 5 times. In the process of joint technological, design and physical research in the field of nanomanipulation and nanoassembly technology, the following main results were obtained by the participating groups. The Indian group, together with the Russian group, studied the melting processes at the micro-level of dimensions, and showed the possibility of manipulating a drop of molten gallium with the help of electromigration and the formation of contact chains for nanoassembly without the use of lithography. Also, the Russian and Indian groups studied the possibility of individual manipulation of microparticles in the liquid. The Chinese group, together with the Russian one, manufactured and tested a prototype of a spin-injection microwave electromagnetic oscillator for nanosensory applications. The Russian and South African groups produced "bottom-up" nanoassembly of carbon nanomaterials, such as CNT, decorated with magnetic ions and nanodiamonds ring structures, and they were searched for quantum effects such as quantum oscillations of transport properties and superconductivity. The Brazilian, Chinese and Russian groups jointly produced prototypes of nano-bio-sensors based on field-effect transistors made of suspended semiconductor nanowires using the bottom-up nanosembly method. Two original approaches to nanoassembly were used: a variant of the traditional scheme with liquid transportation of nanowires and an approach based on three-dimensional manipulation using the nanotweezers with a shape memory effect.

Shape memory effect of three-dimensional printed products based on polypropylene/nylon 6 alloy

2019 ◽  
Vol 54 (12) ◽  
pp. 9235-9246 ◽  
Author(s):  
Xiaodong Peng ◽  
Hui He ◽  
Yunchao Jia ◽  
Hao Liu ◽  
Yi Geng ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Three Dimensional ◽  
Nylon 6

Synthesis and Shape Memory Effect of Poly(Glycerol-Sebacate) Elastomer

2012 ◽  
Vol 476-478 ◽  
pp. 2141-2144 ◽  
Author(s):  
Li Li Liu ◽  
Fa Cheng Yi ◽  
Wei Cai
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Three Dimensional ◽  
Mechanical Analysis ◽  
Bending Test ◽  
Scanning Calorimetry ◽  
Soft Tissue Regeneration ◽  
Dimensional Network ◽  
Fixed Phase

Poly (glycerol-sebacate) (PGS) is a recently synthesized elastomer with superior mechanical property, biocompatibility and biodegradation, and serves as soft tissue regeneration and engineering materials or contact guidance materials. The samples for shape memory measurements were prepared by a two steps method. The microstructure and thermal properties of PGS are studied by using Fourier transform infrared (FTIR), differential scanning calorimetry (DSC) and Dynamic-mechanical analysis (DMA) methods. The shape memory effect of PGS is recorded by bending test. It was found that a crosslinked, three-dimensional network of the PGS acting as fixed phase and the amorphous phase of the PGS acting as reversible phase are the two necessary conditions for PGS with shape memory behavior. The response temperature of shape memory is dependent on the glass transition temperature of PGS. The PGS polymer with a high elasticity and a shape-memory ratio of almost 100% showed excellent shape memory effect.

Tensile Failure of 55-Nitinol Wire

1975 ◽  
Vol 33 ◽  
pp. 46-47
Author(s):  
F. I. Grace
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Stoichiometric Composition ◽  
Tensile Failure ◽  
Initial State ◽  
Initial Shape ◽  
Nitinol Wire ◽  
Cscl Type ◽  
Shear Transformation

An interest in NiTi alloys with near stoichiometric composition (55 NiTi) has intensified since they were found to exhibit a unique mechanical shape memory effect at the Naval Ordnance Laboratory some twelve years ago (thus refered to as NITINOL alloys). Since then, the microstructural mechanisms associated with the shape memory effect have been investigated and several interesting engineering applications have appeared.The shape memory effect implies that the alloy deformed from an initial shape will spontaneously return to that initial state upon heating. This behavior is reported to be related to a diffusionless shear transformation which takes place between similar but slightly different CsCl type structures.

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