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Electromagneto-thermo-mechanical Dynamics of Composite SMA System

复合 SMA 系统的电磁热机械动力学

基本信息

批准号：
06650274
负责人：
TAKAGI Toshiyuki
金额：
$ 1.34万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650274/
关键词：
SMA Composite material intelligent electromagnetic heating coupling stress dynamics transformation ニチノール

项目摘要

The purpose of this study is to investigate the electromagneto-thermo-mechanical properties of Shape Memory Alloy (SMA) plates and SMA composites.(1) Tensile, heating and vibration tests were performed for the evaluation of the magneto-thermo-mechanical characteristics of a SMA plate.i) The martensite transformation and austenite transformation TiNi plates can be expressed by the constitutive equations which have been originally derived for SMA wires.ii) SMA plate can be heated by the noncontact electromagnetic induction. The natural frequency of a SMA plate can be changed by the electromagnetic induction heating.(2) Reversible shape memory effects (RSME) of Titanium-Nickel SMA was applied to fluid flow control. The SMA plate changes its shape from flat to arc with temperature rise by RSME.The shape change of this SMA plate is caused by R-phase transformation, hence it has small hysterisis compared with martensite transformation. This fluid flow controller can separate hot fluid and cold fluid to each corresponding outlet. The SMA plate actuator in this fluid controller can move without sensors and bias springs.(3) SMA fibers were embedded in Acryl resin. This fabricated composite plate can change its natural frequency by temperature rise. Though the stiffness of matrix decreases as temperature rises, the total stiffness of the composite plate can be kept almost constant by using the transformation of SMA fibers.

本研究的目的是研究形状记忆合金（SMA）板和 SMA 复合材料的电磁热机械性能。（1）通过拉伸、加热和振动试验来评估 SMA 板的磁热机械特性。i）TiNi 板的马氏体相变和奥氏体相变可以用以下本构方程表示：最初源自 SMA 线。ii) SMA 板可以通过非接触式电磁感应加热。通过电磁感应加热可以改变SMA板的固有频率。(2)将钛镍SMA的可逆形状记忆效应(RSME)应用于流体流动控制。通过RSME，随着温度的升高，SMA板的形状从平坦变为弧形。该SMA板的形状变化是由R相变引起的，因此与马氏体相变相比，其滞后性较小。该流体流量控制器可以将热流体和冷流体分离到每个相应的出口。该流体控制器中的SMA板执行器可以在没有传感器和偏置弹簧的情况下移动。(3)将SMA纤维嵌入丙烯酸树脂中。这种制造的复合板可以通过温度升高来改变其固有频率。尽管基体的刚度随着温度的升高而降低，但通过使用SMA纤维的转变，复合材料板的总刚度可以保持几乎恒定。