【摘要】：伴隨社會經(jīng)濟(jì)的不斷發(fā)展,采用智能傳感監(jiān)測系統(tǒng)的在線健康監(jiān)測和預(yù)報,已在重要混凝土建筑工程中廣泛應(yīng)用。水泥基壓電復(fù)合材料擁有低聲阻抗、低機(jī)械品質(zhì)因數(shù)以及高機(jī)電耦合系數(shù)等特點。這種新型的功能材料可以較好的解決一般智能材料與混凝土結(jié)構(gòu)材料兼容性不佳的問題;且對濕度不敏感,能長久工作在混凝土環(huán)境中。智能材料若失去本要實現(xiàn)的特定功能,則稱之為失效。植入于混凝土結(jié)構(gòu)中的智能傳感器也將隨結(jié)構(gòu)體一起受到靜態(tài)或動態(tài)載荷的作用,發(fā)生傳感信號異常,甚至失效,因而智能傳感材料耦合性能的研究引起了學(xué)界的廣泛關(guān)注。本文以PZT5H為功能體,普通硅酸鹽水泥為基體,采取切割-澆注法制備了1-3型水泥基壓電復(fù)合材料,并對PZT5H材料和1-3型水泥基壓電復(fù)合材料分別在準(zhǔn)靜態(tài)和動態(tài)載荷下的力電響應(yīng)特性及其材料損傷失效規(guī)律進(jìn)行了實驗研究與分析。利用MTS伺服試驗機(jī)和分離式Hopkinson壓桿裝置(SHPB)分別對PZT5H和1-3型水泥基壓電復(fù)合材料進(jìn)行準(zhǔn)靜態(tài)壓縮實驗和動態(tài)壓縮實驗。由實驗可得:沖擊載荷條件下,PZT5H和1-3型水泥基壓電復(fù)合材料的電位移與應(yīng)力均具有較好的力電響應(yīng)關(guān)系;且隨應(yīng)變率的增加,在產(chǎn)生相同應(yīng)變或應(yīng)力下,所對應(yīng)的應(yīng)力或電位移也分別增加;同時,在一定應(yīng)變率范圍內(nèi),隨應(yīng)變率的增加,試樣在沖擊載荷下的失效電位移也增加。在準(zhǔn)靜態(tài)多次加載條件下,由于電疇反轉(zhuǎn)現(xiàn)象,兩種試樣的電位移幅值均隨著加載次數(shù)的增加而減少;在多次循環(huán)加載下,隨循環(huán)次數(shù)的增加材料的殘余應(yīng)變累積增加,電位移幅值和剩余電位移均逐步減小,壓電材料的壓電性能也相對減弱,直至力電耦合響應(yīng)失效。
[Abstract]:With the development of social economy, the on-line health monitoring and forecasting using intelligent sensor monitoring system has been widely used in important concrete construction projects. Cement based piezoelectric composites have the characteristics of low impedance, low mechanical quality factor and high electromechanical coupling coefficient. This new type of functional material can solve the problem of poor compatibility between general intelligent materials and concrete structure materials, and it is insensitive to humidity and can work in concrete environment for a long time. A smart material that loses a specific function that it is intended to achieve is called a failure. The intelligent sensors implanted in concrete structures will also be subjected to static or dynamic loads along with the structure, resulting in abnormal or even invalid sensing signals. Therefore, the research on the coupling properties of intelligent sensing materials has attracted wide attention in the academic field. In this paper, 1-3 type cement-based piezoelectric composites were prepared with PZT5H as functional body and ordinary Portland cement as matrix. The mechanical and electrical response characteristics of PZT5H and 1-3 type cement based piezoelectric composites under quasi-static and dynamic loading respectively and the damage failure law of the materials are studied and analyzed experimentally. The quasi static compression experiments and dynamic compression experiments of PZT5H and 1-3 type cement based piezoelectric composites were carried out by using MTS servo testing machine and separate Hopkinson compression bar device (SHPB) respectively. The experimental results show that the electric displacement and stress of PZT5H and 1-3 type cement based piezoelectric composites have a good electromechanical response under shock loading. With the increase of strain rate, the corresponding stress or electric displacement increases respectively under the same strain or stress, and the failure electric displacement increases with the increase of strain rate in a certain range of strain rate. Under quasi-static multi-loading condition, the amplitude of electric displacement decreases with the increase of loading times due to domain reversal. Under repeated cyclic loading, the residual strain accumulation increases with the increase of cycle times, the amplitude of electric displacement and residual electric displacement decrease gradually, and the piezoelectric properties of piezoelectric materials weaken relatively, until the electromechanical coupling response fails.
【學(xué)位授予單位】：寧波大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB33

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 關(guān)新春;劉彥昌;李惠;歐進(jìn)萍;;1-3型水泥基壓電復(fù)合材料的制備與性能研究[J];防災(zāi)減災(zāi)工程學(xué)報;2010年S1期

2 張智丹;紀(jì)松;張延松;;沖擊載荷下PVDF和PZT壓電材料的動態(tài)性能研究[J];兵器材料科學(xué)與工程;2008年02期

3 黃世峰;葉正茂;王守德;徐東宇;常鈞;程新;;1-3型水泥基壓電復(fù)合材料的制備及性能[J];復(fù)合材料學(xué)報;2007年01期

4 程新;黃世峰;胡雅莉;王守德;;環(huán)境濕度對1 3型水泥基壓電復(fù)合材料性能的影響[J];硅酸鹽學(xué)報;2006年05期

5 胡雅莉;黃世峰;徐東宇;程新;;陶瓷體積分?jǐn)?shù)對水泥基壓電復(fù)合材料性能的影響[J];濟(jì)南大學(xué)學(xué)報(自然科學(xué)版);2006年02期

6 董新龍,周廣宇,嚴(yán)偉,祈振林;壓縮載荷下PZT鐵電陶瓷的非線性變形[J];寧波大學(xué)學(xué)報(理工版);2005年01期

7 歐進(jìn)萍;重大工程結(jié)構(gòu)智能傳感網(wǎng)絡(luò)與健康監(jiān)測系統(tǒng)的研究與應(yīng)用[J];中國科學(xué)基金;2005年01期

8 黃世峰,常鈞,徐榮華,劉福田,蘆令超,程新;0-3型壓電陶瓷-硫鋁酸鹽水泥復(fù)合材料的壓電性能[J];復(fù)合材料學(xué)報;2004年03期

9 劉高e，

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