發(fā)布時間：2019-01-03 19:17

【摘要】：柔性電子器件采用柔性基底以及新型的材料和結(jié)構(gòu),這使電子器件具有很好的延展性和柔性,在醫(yī)療器械、能量收集、傳感、國防等領(lǐng)域具有廣泛應用前景。柔性電子器件具有與傳統(tǒng)電子器件無法比擬的優(yōu)點,它可以承受很大的力學變形而保持電學性能不發(fā)生變化。對柔性電子器件的力學分析可以為柔性電子器件的設(shè)計以及力學失效提供理論基礎(chǔ),對柔性電子器件的發(fā)展具有重大的意義。本文對柔性電子器件中常用的島-橋結(jié)構(gòu)的力學行為進行理論分析和有限元模擬。首先,通過對實際柔性電子器件中的島-橋結(jié)構(gòu)進行簡化,建立其力學模型進行理論求解,分別基于梁理論和板理論對島-橋結(jié)構(gòu)在基底預應變釋放后的力學行為進行了分析,得出了變形后橋中點處的最大位移,并分析比較了兩種理論的優(yōu)劣勢。其次,對島-橋結(jié)構(gòu)的二維簡化模型進行了有限元模擬,分別探討了位移載荷、島-橋結(jié)構(gòu)彈性模量、基底與島-橋結(jié)構(gòu)厚度比以及基底中預拉伸應變大小對島-橋結(jié)構(gòu)變形的影響,通過擬合得出了相關(guān)的最佳參數(shù),并與理論分析的結(jié)果進行了比較,驗證了理論分析的結(jié)果。最后,對島-橋結(jié)構(gòu)的變形進行了三維有限元模擬,探討了島-橋結(jié)構(gòu)在受載過程中的變形機理,利用重啟動分析技術(shù)研究了基底中預拉伸載荷對島-橋結(jié)構(gòu)變形的影響,并將三維的模擬結(jié)果與二維結(jié)果進行了對比,分析了二者結(jié)果之間產(chǎn)生差異的原因。本文的分析結(jié)果對柔性電子器件結(jié)構(gòu)的設(shè)計和優(yōu)化具有一定的理論和實際意義。
[Abstract]:Flexible electronic devices adopt flexible substrates and new materials and structures, which make the electronic devices have good ductility and flexibility, and have a broad application prospect in medical devices, energy collection, sensing, defense and other fields. Flexible electronic devices have the advantages that cannot be compared with traditional electronic devices. They can withstand large mechanical deformation and keep their electrical properties unchanged. The mechanical analysis of flexible electronic devices can provide a theoretical basis for the design and mechanical failure of flexible electronic devices. It is of great significance to the development of flexible electronic devices. In this paper, the mechanical behavior of island-bridge structures commonly used in flexible electronic devices is analyzed theoretically and simulated by finite element method. Firstly, by simplifying the island-bridge structure in practical flexible electronic devices and establishing its mechanical model, the mechanical behavior of the island-bridge structure after the foundation pre-strain release is analyzed based on the beam theory and the plate theory, respectively. The maximum displacement at the midpoint of the deformed bridge is obtained, and the advantages and disadvantages of the two theories are analyzed and compared. Secondly, the two-dimensional simplified model of island-bridge structure is simulated by finite element method, and the displacement load, elastic modulus of island-bridge structure are discussed respectively. The effect of the thickness ratio of the basement to the island-bridge structure and the pre-tensile strain in the basement on the deformation of the island-bridge structure is studied. The best parameters are obtained by fitting, and the results are compared with those of the theoretical analysis, and the results of the theoretical analysis are verified. Finally, the deformation of island-bridge structure is simulated by three-dimensional finite element method, and the deformation mechanism of island-bridge structure under load is discussed. The effect of pretension load on the deformation of island-bridge structure is studied by restarting analysis technique. The results of three-dimensional simulation and two-dimensional results are compared, and the reasons for the difference between the two results are analyzed. The results of this paper are of theoretical and practical significance for the design and optimization of flexible electronic devices.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN603

【引證文獻】

相關(guān)會議論文 前3條

1 曲斌瑞;馮雪;;柔性電子的制備表征及力學性能研究[A];中國力學學會學術(shù)大會'2009論文摘要集[C];2009年

2 王永;馮雪;黃永剛;;可延展柔性鐵電器件力學分析[A];中國力學學會學術(shù)大會'2009論文摘要集[C];2009年

3 ;2010年第四屆微納米海峽兩岸科技暨納微米系統(tǒng)與加工制備中的力學問題研討會[A];2010年第四屆微納米海峽兩岸科技暨納微米系統(tǒng)與加工制備中的力學問題研討會摘要集[C];2010年

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本文編號：2399774