本文選題：連續(xù)玻璃纖維 + 斷裂模型��； 參考：《北京化工大學(xué)》2015年碩士論文

【摘要】：高性能樹脂基復(fù)合材料大部分是先通過拉擠熔融工藝成型方法制成連續(xù)纖維增強(qiáng)復(fù)合材料預(yù)浸料或預(yù)浸帶,而后通過后續(xù)成型工藝,諸如注塑、模壓、RTM等成型工藝制成目標(biāo)產(chǎn)品�，F(xiàn)如今,預(yù)浸料的制備過程已有很多科研成果,包括浸漬理論、界面結(jié)合等等,但是鮮有對復(fù)合過程中連續(xù)纖維斷裂的研究,纖維在復(fù)合過程中的斷裂僅僅停留在經(jīng)驗(yàn)層面,無法準(zhǔn)確描述實(shí)驗(yàn)工藝參數(shù)及原料性能對復(fù)合過程中纖維斷裂的影響。通過拉擠熔融成型的工藝方法,成型了連續(xù)玻璃纖維增強(qiáng)聚丙烯復(fù)合材料預(yù)浸料,研究了連續(xù)纖維絲束在復(fù)合過程中運(yùn)動歷程,分析了其在運(yùn)動過程中的受力情況,結(jié)合纖維絲束本身的強(qiáng)度概率分布函數(shù)(二參數(shù)的Weibull分布),建立了基于物料參數(shù)(樹脂的黏度),纖維物性參數(shù)(Weibull參數(shù)),工藝參數(shù)(停留時(shí)間、浸漬輥數(shù)、模具溫度),模具結(jié)構(gòu)尺寸參數(shù)的纖維斷裂理論模型。利用實(shí)驗(yàn)室自主設(shè)計(jì)加工的連續(xù)纖維增強(qiáng)熱塑性復(fù)合材料(Continuous Fiber Reinforced Thermoplastic Composites)預(yù)浸料的制備平臺進(jìn)行實(shí)驗(yàn),對所建立的纖維斷裂的理論模型中部分的參數(shù)影響規(guī)律進(jìn)行了驗(yàn)證,分別考察了停留時(shí)間、模具溫度以及浸漬輥數(shù)對纖維斷裂率和預(yù)浸料浸漬效果的影響。最后利用正交實(shí)驗(yàn)分析軟件,得到在實(shí)驗(yàn)室條件下的最優(yōu)工藝參數(shù),最終得到拉擠熔融成型工藝下制備復(fù)合材料預(yù)浸料的加工區(qū)間,為工業(yè)化生產(chǎn)提供一定的參考規(guī)范和理論依據(jù)。討論了片狀和條狀粒料以及粒料纖維含量與注塑制品的殘余纖維長度以及力學(xué)性能之間的關(guān)系,并利用Moldflow模流分析軟件分析熔體溫度以及纖維含量對制品中纖維狀態(tài)(纖維取向和殘余長度)的影響,并與實(shí)驗(yàn)結(jié)果進(jìn)行對比分析。
[Abstract]:High performance resin matrix composites are made into continuous fiber reinforced composite prepreg or prepreg tape by pullout and melting process, and then through subsequent molding processes, such as injection molding, Molding process, such as RTM, to make the target product. Nowadays, many scientific achievements have been made in the preparation of prepreg materials, including impregnation theory, interface bonding and so on. However, there are few studies on continuous fiber fracture in the process of composite, and the fracture of fiber in the process of composite only stays at the empirical level. The effects of experimental process parameters and raw material properties on fiber fracture in the process of composite can not be accurately described. The prepreg of continuous glass fiber reinforced polypropylene (PP) composites was formed by the pullout melt molding process. The motion process of the continuous fiber bundle in the process of composite was studied, and the force acting on the continuous fiber bundle during the process was analyzed. Based on the strength probability distribution function of fiber bundle (Weibull distribution of two parameters), the material parameters (viscosity of resin, fiber physical properties), process parameters (residence time, number of impregnating rolls) were established. The theoretical model of fiber fracture for mould temperature and die structure dimension parameter. The experiment was carried out on the platform of continuous Fiber Reinforced Thermoplastic Composites) prepreg for continuous fiber reinforced thermoplastic composites, which was designed and processed independently in laboratory. The influence of some parameters in the theoretical model of fiber fracture was verified. The effects of residence time, die temperature and number of impregnating rolls on the fiber fracture rate and the impregnation effect of prepreg were investigated. Finally, the optimal process parameters under laboratory conditions are obtained by using orthogonal experimental analysis software. Finally, the processing interval for preparing composite prepreg under pullout and melt forming process is obtained. To provide certain reference norms and theoretical basis for industrial production. The relationship between the fiber content and the length of residual fibers and the mechanical properties of injection molded products are discussed. The effects of melt temperature and fiber content on the fiber state (fiber orientation and residual length) in the products were analyzed by Moldflow software, and the results were compared with the experimental results.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB332

【參考文獻(xiàn)】

相關(guān)博士學(xué)位論文 前1條

1 方立;連續(xù)纖維增強(qiáng)熱塑性復(fù)合材料制備及其性能的研究[D];華東理工大學(xué);2012年

相關(guān)碩士學(xué)位論文 前1條

1 宋偉;復(fù)合材料構(gòu)件先進(jìn)拉擠工藝研究[D];南京航空航天大學(xué);2011年

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本文編號：1974566