本文選題：MSMA + 傳感特性��； 參考：《武漢科技大學(xué)》2015年碩士論文

【摘要】：磁控形狀記憶合金（Magnetically Controlled Shape MemoryAlloy，簡稱MSMA）是一種新型的智能材料。該材料具有優(yōu)異的磁控形狀記憶特性，在磁場的作用下可獲得較大的磁感生應(yīng)變并對外輸出應(yīng)力。在偏置磁場中，對已經(jīng)發(fā)生磁感生應(yīng)變的MSMA材料加載機(jī)械脈沖將其壓縮，由于材料磁導(dǎo)率發(fā)生變化會對磁路中磁感應(yīng)強(qiáng)度的大小產(chǎn)生影響，這就是磁控形狀記憶逆特性（傳感特性），為MSMA能夠運用在傳感器領(lǐng)域提供了理論基礎(chǔ)。目前國內(nèi)外對其研究主要集中在MSMA的磁控形狀記憶特性而對其傳感特性研究較少。本文將對MSMA的傳感特性進(jìn)行實驗研究，，并對MSMA在偏置磁場中應(yīng)力、應(yīng)變和磁感應(yīng)強(qiáng)度之間的關(guān)系進(jìn)行建模分析。 在對MSMA材料的微觀結(jié)構(gòu)、形變機(jī)理、材料特性以及影響因素做了基礎(chǔ)研究之后，借助CAD、Pro/E、ANSYS等軟件進(jìn)行設(shè)計和仿真，結(jié)合電磁感應(yīng)相關(guān)的知識，制作了測試MSMA材料傳感特性的實驗臺。以芬蘭AdaptaMat公司生產(chǎn)的Ni2MnGa磁控形狀記憶合金為研究對象，通過對實驗臺中的電流、溫度進(jìn)行實時控制，記錄MSMA材料在偏置磁場中的壓應(yīng)變、壓應(yīng)力以及磁路中磁感應(yīng)強(qiáng)度的變化等數(shù)據(jù)。通過對實驗結(jié)果進(jìn)行分析，發(fā)現(xiàn)了MSMA材料傳感特性的最佳偏置磁場和最佳環(huán)境溫度。最后以能量守恒定律為模型框架對MSMA材料的傳感特性進(jìn)行建模分析，通過數(shù)學(xué)模型得到了偏置磁場中MSMA材料的應(yīng)變、應(yīng)力和磁感應(yīng)強(qiáng)度之間的數(shù)學(xué)關(guān)系。 研究表明在最佳環(huán)境溫度和最佳偏置磁場中，對MSMA材料施加應(yīng)力使其發(fā)生應(yīng)變，能對磁路中的磁感應(yīng)強(qiáng)度產(chǎn)生較大的影響，體現(xiàn)出較高的傳感靈敏度。本文的研究工作對基于MSMA材料的傳感器的開發(fā)具有一定的指導(dǎo)意義。
[Abstract]:Magnetically controlled shape memory alloy (MSMA) is a new type of smart material. The material has excellent magnetic shape memory properties and can obtain large magnetically induced strain and output stress under the action of magnetic field. In the bias magnetic field, the MSMA material with magnetically induced strain is compressed by a mechanical pulse, because the change of the permeability of the material will affect the magnitude of the magnetic induction intensity in the magnetic circuit. This is the inverse characteristic of magnetically controlled shape memory (sensing characteristics), which provides a theoretical basis for the application of MSMA in the field of sensors. At present, the research of MSMA is mainly focused on the magnetic shape memory characteristics of MSMA, but less on its sensing characteristics. In this paper, the sensing characteristics of MSMA are experimentally studied, and the relationship between the stress, strain and magnetic induction intensity of MSMA in a bias magnetic field is modeled and analyzed. After the basic research on the microstructure, deformation mechanism, material characteristics and influencing factors of MSMA materials, the design and simulation of MSMA materials are carried out by means of CADX Prop / EN ANSYS software, and combined with the relevant knowledge of electromagnetic induction. An experimental bench for measuring the sensing characteristics of MSMA materials was made. Taking Ni _ 2MnGa magnetically controlled shape memory alloy produced by AdaptaMat Company of Finland as the research object, the pressure strain of MSMA material in the bias magnetic field was recorded by real-time controlling the current and temperature in the test rig. Data of compressive stress and magnetic induction intensity in magnetic circuit. Through the analysis of the experimental results, the optimum bias magnetic field and the optimum ambient temperature of the sensing characteristics of MSMA are found. Finally, based on the energy conservation law, the sensing characteristics of MSMA materials are modeled and analyzed, and the mathematical relations between the strain, stress and magnetic induction intensity of MSMA materials in the bias magnetic field are obtained by mathematical model. The results show that in the optimum ambient temperature and the optimum bias magnetic field, the stress on the MSMA material causes the strain, which can have a great influence on the magnetic induction intensity in the magnetic circuit, and the sensitivity of the sensor is higher. The research work in this paper has certain guiding significance to the development of the sensor based on MSMA material.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB34;TP212

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本文編號：2079021