The housing has a higher coefficient of expansion than the ring . 殼體比圓環(huán)具有較高的膨脹系數(shù)。
A study on thermal coefficient of expansion for fiber composite material 光聲法測量材料熱膨脹系數(shù)的實驗研究
The thermostat is based on the fact that different metals have different coefficients of expansion 恒溫器是以不同的金屬有不同的膨脹系數(shù)這一事實為根據(jù)的。
3 it has a precision through and the coefficient of expansion has been calculated accurately , so it is very smooth , bright and clean 3 、精密卡標(biāo)企口軌道設(shè)計,并經(jīng)準(zhǔn)確計算膨脹系數(shù),平整光潔。
A bimetallic strip formed by joining together two metal strips with different coefficients of expansion suffers bending deformation when the temperature changes 雙金屬條由兩條膨脹系數(shù)不同的金屬條連接而成,它們在溫度變化時產(chǎn)生彎曲變形。
The process of the seal stress forming has been analyzed , that mainly comes from its variance of hot coefficient of expansion of ceramic and metal in seal connect 主要研究了封接應(yīng)力,封接應(yīng)力主要是由于封接過程中,陶瓷和金屬材料的熱膨脹系數(shù)不一致造成。
Aluminum alloy matrix composite has a series of advantages such as low density , high specific strength and specific modulus , high wear resistance , low coefficient of expansion , high coefficient of heat conductivity and high cooling rate 鋁基復(fù)合材料具有密度低、強度和模量高、耐磨損、膨脹系數(shù)低、導(dǎo)熱系數(shù)高以及散熱速度快等一系列優(yōu)點。
Model sywly - 75 physics high to foam polyethylene insulating , aluminum pipe other conductor coaxial cable suitable for catv backbone project , its interior conductor adopt bastion of iron make aluminium , other conductor adopt aluminum pipe , the two have the same hot coefficient of expansion and modulus of elasticity , woods reduce in cable conductor draw the troubles that are led to the fact Sywly - 75型物理高發(fā)泡聚乙烯絕緣、鋁管外導(dǎo)體同軸電纜適用于catv主干線工程,其內(nèi)導(dǎo)體采用銅墻鐵壁包鋁,外導(dǎo)體采用鋁管,兩者具有相同的熱膨脹系數(shù)和彈性模數(shù),林減少了由電纜內(nèi)導(dǎo)體拉拔所造成的故障。
Several materials with large coefficient of expansion were selected to make packaging components , and it was found that the packaging materials have good temperature sensitivity and compatibility with optical fibers . experimental accuracy and repetition of fbg temperature sensitivity and compensation were discussed . have selected several materials which has bigger coefficient of expansion to do packaging components , have made many temperature experiments , there have not flaws , such as aging , crackle , absciss layer , packaging materials have good temperature sensitivity and compatibility with optical fiber ; have designed the simple and practical packaging components , have performed a serials of experiments about accuracy and repetition of fbg wave - length , have obtained the first step conclusion ; have analyzed the result and made comparison between the result of different experiment , have summarized the best packaging effect and several rules to reduce mistskes 本文所做的主要工作包括以下幾個內(nèi)容:一、選取了常見的熱膨脹系數(shù)大的材料制作封裝元件,經(jīng)過多次一80到80反復(fù)測試,封裝元件沒有出現(xiàn)老化開裂、封裝裂紋、空洞、離層等缺陷,封裝材料具有良好的溫敏穩(wěn)定性及復(fù)用性,與光纖相容性較好;二、對光纖光柵進行簡單、實用的封裝處理,就封裝效果的優(yōu)劣性、波長測量的準(zhǔn)確度、重復(fù)性和封裝時產(chǎn)生的波長損失等方面進行了一系列的實驗,得出了初步的結(jié)論;三、對溫敏和溫度補償式封裝的實驗數(shù)據(jù)進行了詳細的分析和對比,從數(shù)字上對溫變過程中光纖光柵中心波長的改變及溫變曲線進行了定量的分析,在大量實驗數(shù)據(jù)分析結(jié)果的基礎(chǔ)上,總結(jié)出哪種材料封裝效果更好,以及如何有效的減小實驗誤差。
英文解釋
the fractional change in length or area or volume per unit change in temperature at a given constant pressure 同義詞:expansivity,