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1、西北工業(yè)大學(xué)碩士學(xué)位論文電流變液微波、光學(xué)性質(zhì)及其結(jié)構(gòu)演化特征姓名:高秀敏申請學(xué)位級別:碩士專業(yè):材料物理與化學(xué)指導(dǎo)教師:趙曉鵬20030301摘簧摘要嘏流交滾(ElectrorheologicalFluid籬稱ER瀛俸)楚~稀豁麓榜料,通常鑫凝奔魄常數(shù)鶼黻粒分稚奄低貪窀常數(shù)懿鰓緣蕊滾中梭躐。未麓豁電凌潛,遣澈交液黧聯(lián)牛頓滾體力學(xué)特性;警鴦K舞電萌辯,顙狡渾籀受籜爝器致毫流變滾黧蠛蔫夸鋏滾傣力學(xué)特靛,賚滾態(tài)轉(zhuǎn)交為壤霾態(tài),顯這~避程楚瓣霾懿、霹誕羧熬、麓遂漿。本文疆袋了電瀛交液懿微波透瓣霹譎控行為、鼴淺簸瘦、縫鞫滾像翡
2、蘞、及臻控奄滾嶷渡穗轉(zhuǎn)變瓣遂。主要取褥了戩下磅究袋繁;i。建立奄滾變渡在努奄溪移怒下豹檄渡透射攜理模熬。菝豢舞毫場律焉下魄滾變波結(jié)橡滌蛋熬爨經(jīng)璇愛為各鵜黲襤熬實驗事窳,馱轟爨凝韋方稷維感裁,萼出了擻波遴袈率靜表遮式。爨論摟羧表臻:當(dāng)毫浚變滾套泡鬻數(shù),l、予裝一傻時,透瓣攀睫外鴦瑟魄場煺期兩增鴦瑟;當(dāng)魄、瀛變波貪瞧常數(shù)大予姚舔醛,透瓣搴夔耱熱窀場增藤瑟羰棗。2.實黢戲測了淀羧醚濁電流變波的微波透射稽為。實駿維暴表明;邂滾變渡擻波透射率粒變純霹班蠢努熱邀場調(diào)控。當(dāng)逛流變波濃度較低時,徽波遴默率隨電場增趣{《{i增趣;反之
3、賤減小。實驗骶德電場對徽波透魁率調(diào)控媳鬏撩與理論模型慕零奶合。3+研究了電流變波譙外加電場俸用下旋光效應(yīng)??紤]瞧場傳爝下嗽流變滾中不嗣振動方翻豹線鑣振兔衰減不闋,撮掇必波在灸袋串魏銨疆理論,攘強出光通過電流交液的旋光危艫與穢(入射線偏振光搬動方向與外加電場方弼的夾角>投其它參數(shù)的關(guān)系表遮式。并模擬出∥醚移交純豹關(guān)系翻。4+實驗觀測了泊肅葉流動狀態(tài)下電流變液蹈構(gòu)的演化遐程,并與模數(shù)縮栗讖行魄較。實驗窺測靜結(jié)萊與理論模擬基本輔符,麓巍察剿徽叛壁上豹頹鶼靜止不動,誕明了“極板壁上顆粒靜止不動”這一假設(shè)的正確性。5.磷究了電
4、流變滾羽場控裰轉(zhuǎn)變,黼溺控鬏粒流褥題。犖j麓乎叛電學(xué)模塑,掭導(dǎo)島毫流交液發(fā)室稆轉(zhuǎn)變時,備鏹理鬟之間靜燕系表達式。模擬潦了發(fā)墅穗轉(zhuǎn)交拜雩備耪壤爨之潮翡褒耗燒律,并避芎亍了實驗蕊溺。實驗結(jié)暴與遴論褶箝較好。關(guān)鍵簪;遣漉交液,搬波透瓣率,旋斃效應(yīng),結(jié)構(gòu)滾純,稿轉(zhuǎn)炎塑i!!鱉A囂STRAC零Electrorheologicalfuid(ERfluid),afindofintelligentmaterial,isusuallydispersedsuspensionoffinesolidparticleswithhi或diele
5、ctricconstantintoinsulating{iquidofIoWdielectricconstant.Withoutexternalelectric蠡e撼.ERfluidshowsthemechanicpropertiesofNewtonflui出butwhentheexternalelec讎icfieldisapplied,ERfluidturnsfromthefluidintothequasi—solidandshowsthenou-Newtonmechanicpropertiesbecauseoft
6、heinteractionamongparticles.弧eprocessiSnlomentary,controllableandrevisable+tnthisarticle,濂microwavetransmission。opticalrotationeffect,structureevolutionandthephasetransitiOnofERfluidsarestudied+強emai拄resultsareshowed墨Sfollow:l,鼴鼯theoreticalmodelofmicrowavetrans
7、missioninll置爨醢i趣isestablished。翔ebasicformulaofmicrowavetransmissioniSinducedfromtheMaxwellequations.TheresultsshowthatthemicrowavetransmissionincreaseswiththeincreasingexternateteetricfieldwhenthedielectricconstantofERfluidsissmallerthanthethresholdvalue,and,co
8、nversely,thetransmissiondecreases娥thelectricfield.2.ThetransmissionofmicrowaveinERfluidsiSstudiedbyexperiment,TheexperimentalresIuttsshowthatthemicrowavetransmissionCanbeadj