scholarly journals Functional properties of TiNi conical working elements in the holding and release device

2018 ◽  
pp. 216-219
Author(s):  
Eugene S. Ostropiko ◽  
Alexander I. Razov
Keyword(s):  
Shape Memory Alloy ◽  
Functional Properties ◽  
Graphical Method ◽  
Martensitic Transformations ◽  
The Other ◽  
Space Application ◽  
Constraint Forces ◽  
Characteristic Temperatures ◽  
Release Device ◽  
Temperatures Of Martensitic Transformations

Functional properties of conical working elements of the holding and release device for space application needed to control the device were investigated. The elements had 45 mm in diameter, 11 mm in height and 2 mm in thickness, and were made of TiNi shape memory alloy with characteristic temperatures of martensitic transformations Mf = 30^oC; Ms = 45^oC; As =55^oC; Af = 75^oC. Constraint forces and displacement recovery of the conical working elements as functions of the temperature were obtained. It was found that the friction loss for two conical elements put one in the other one reach 15%. A simple graphical method to evaluate the displacement recovery and constraint forces of such conical working elements needed to control the device is proposed.

scholarly journals Design Concepts for NiTiNOL Wires to Function as a Sensor

2021 ◽  
Author(s):  
D. Josephine Selvarani Ruth
Keyword(s):  
Shape Memory Alloy ◽  
Electrical Resistance ◽  
Nickel Titanium ◽  
The Other ◽  
Sensing Element ◽  
Proper Selection ◽  
Design Concepts ◽  
Mechanical Element ◽  
Selection Of ◽  
Inverse Hysteresis

AbstractNickel Titanium Naval Ordinance Laboratory (NiTiNOL) is widely called as a shape memory alloy (SMA), a class of nonlinear smart material inherited with the functionally programmed property of varying electrical resistance during the transformation enabling to be positioned as a sensing element. The major challenge to instrument the SMA wires is to suppress the wires’ nonlinearity by proper selection of two important factors. The first factor is influenced by the mechanical biasing element and the other is to identify the sensing current for the sensing device (SMA wires + biasing). This paper focuses on developing SMA wires for sensing in different orientation types and configurations by removing the non-linearity in the system’s output by introducing inverse hysteresis to the wires through the passive mechanical element.

Martensitic transformations and kinetics in Ti-Ni-Cu-Hf shape memory alloy

2021 ◽  
pp. 129732
Author(s):  
Jun Li ◽  
Kuishan Sun ◽  
Yuqi Jiang ◽  
Xianglong Meng ◽  
Wei Cai
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Martensitic Transformations

A shape memory alloy actuated release device using non-self-locking thread

2021 ◽  
Vol 92 (11) ◽  
pp. 115107
Author(s):  
Xueting Pan ◽  
Honghao Yue ◽  
Yun Tian ◽  
Qi Yao ◽  
Fei Yang ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Release Device

scholarly journals Verbal Monomials in English for Audit and Accounting

2021 ◽  
Vol 04 (03) ◽  
Author(s):  
Oksana Chaika ◽  
Keyword(s):  
Functional Properties ◽  
Functional Property ◽  
The Other ◽  
Discussion Section ◽  
Work In Progress ◽  
The One

The paper research is work in progress and makes part of a publication set devoted the study of the English monomials and polynomials in the professional domain of audit and accounting, on the one hand. On the other, the research can be treated as a standalone piece for the study into the nature of verbal monomials as set term clusters in English for Audit and Accounting. The scope of research arrives at the following objectives. One objective is to give an overview of the term ‘monomial’ in English for Audit and Accounting, or English for A&A, which leads to understanding of the verbal monomial in English for A&A, correspondingly. The other objective refers to the classification introduced earlier as attributable to the analysis of the structure of the mentioned monomials and polynomials in English for A&A from a morphological perspective of the head term in a monomial, i.e. nounal, verbal, adjectival and adverbial. The said classification in this work associates with verbal monomials in English for A&A only, and provides a relevant sub-classification of the relevant verbal monomials through the lens of their functional properties and roles in a sentence, under the professional language framework. The results and discussion section presents five distinct groups of verbal monomials in English for Audit and Accounting, each corresponding to a specific syntactical role and functional property in a sentence. A variety of the examples helps see and identify the type of the English verbal monomial in the area of audit and accounting.

The Articulated Connecting Rod

1927 ◽  
Vol 31 (196) ◽  
pp. 343-344
Author(s):  
J. Morris
Keyword(s):  
Analytical Solution ◽  
Graphical Method ◽  
High Order ◽  
The Other ◽  
First Year ◽  
Connecting Rod ◽  
Close Approximation ◽  
Other Hand ◽  
First Year Student

The method adopted by Mr. Fearn in dealing with the above subject in the February number of the Journal is open to many serious objections. To begin with, it is at best approximate and as Mr. Farren points out in his article in the March number, Mr. Fearn's approximation, although near enough for displacements, give on double differentiation less close approximation for acceleration. And for less regular motions than in the case under discussion the approximation to the acceleration by Mr. Fearn's method might be comparatively poor.The greatest objection which the writer has to Mr. Fearn's method is that it is far too intricate and cumbersome. It unnecessarily involves mathematics of a high order when the problem can be solved by means within the compass of any first year student of engineering.Mr. Farren's method, on the other hand, is of extreme simplicity and as a graphical method could hardly be improved upon. But there is a very simple-analytical solution and one moreover of the familiar type for the ordinary nonarticulated case.

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