發(fā)布時(shí)間：2019-06-22 14:02

【摘要】：電磁彈性復(fù)合材料在現(xiàn)代科學(xué)技術(shù)領(lǐng)域有著廣泛的應(yīng)用,隨著材料科學(xué)的發(fā)展,它已成為一種重要的智能材料和結(jié)構(gòu)。有效電磁彈性系數(shù)是電磁彈性復(fù)合材料的重要參數(shù)并受到復(fù)合材料微結(jié)構(gòu)的強(qiáng)烈影響,因此預(yù)測(cè)電磁彈性復(fù)合材料有效電磁彈性性能具有重要意義。本文研究具有周期微結(jié)構(gòu)的電磁彈性單向纖維復(fù)合材料的有效電彈性性能。以復(fù)合材料代表性體積單元為研究對(duì)象,通過(guò)在代表性體積單元邊界上施加滿足周期性的位移、電勢(shì)和磁勢(shì)邊界條件,利用有限元軟件Comsol Multiphysics的PDE求解模塊,得到了代表性體積單元內(nèi)的電磁彈性場(chǎng)。由平均的電磁彈性場(chǎng)和有效電磁彈性系數(shù)的定義,求解了幾類(lèi)周期電磁彈性復(fù)合材料的有效電磁彈性系數(shù)。分別預(yù)測(cè)了方形排列單元模型電磁彈性復(fù)合材料的有效電磁彈性系數(shù)。通過(guò)算例,比較了相同電磁材料體積分?jǐn)?shù)下圓環(huán)形截面電磁纖維復(fù)合材料與圓截面電磁纖維復(fù)合材料有效電磁彈性性能的差異,討論了壓電與壓磁纖維互相改變時(shí)和涂層的剛性改變時(shí)的力學(xué)性質(zhì)對(duì)有效電磁彈性系數(shù)的影響,對(duì)比了3種壓電壓磁材料不同排列時(shí)的有效電磁彈性系數(shù),研究了破壞對(duì)電磁彈性復(fù)合材料的有效電磁彈性系數(shù)的影響。本文結(jié)論可為高靈敏度電磁彈性復(fù)合材料的設(shè)計(jì)提供有價(jià)值的參考。
[Abstract]:Electromagnetic elastic composites have a wide range of applications in the field of modern science and technology. with the development of material science, it has become an important intelligent material and structure. The effective electromagnetic elastic coefficient is an important parameter of electroelastic composites and is strongly affected by the microstructure of the composites, so it is of great significance to predict the effective electromagnetic elastic properties of electroelastic composites. In this paper, the effective electroelastic properties of electromagnetic elastic unidirectional fiber composites with periodic microstructure are studied. Taking the representative volume element of composite material as the research object, the electromagnetic elastic field in the representative volume element is obtained by applying periodic displacement, potential and magnetic potential boundary conditions on the boundary of the representative volume element, and using the PDE solution module of the finite element software Comsol Multiphysics. Based on the definition of average electromagnetic elastic field and effective electromagnetic elastic coefficient, the effective electromagnetic elastic coefficients of several kinds of periodic electromagnetic elastic composites are solved. The effective electromagnetic elastic coefficients of electromagnetic elastic composites with square arrangement element model are predicted respectively. Through an example, the difference of effective electromagnetic elastic properties between annular section electromagnetic fiber composites and circular cross section electromagnetic fiber composites under the same volume fraction of electromagnetic materials is compared. The effects of mechanical properties on effective electromagnetic elastic coefficients when piezoelectric and piezommagnetic fibers change each other and when the rigidity of the coating changes are discussed. The effective electromagnetic elastic coefficients of three kinds of piezoelectric magnetic materials with different arrangement are compared. The effect of failure on the effective electromagnetic elastic coefficient of electroelastic composites was studied. The conclusion of this paper can provide valuable reference for the design of high sensitivity electromagnetic elastic composites.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TB332

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本文編號(hào)：2504649