本文關(guān)鍵詞： 熱塑性 纖維增強型復(fù)合材料 自動鋪放 缺陷 多尺度分析 工藝設(shè)計　出處：《材料工程》2017年07期 　論文類型：期刊論文

【摘要】：纖維增強型復(fù)合材料(FRP)自動鋪放成型缺陷形成過程涉及多個時空尺度,僅依靠宏觀失效理論及實驗分析等方法無法實現(xiàn)對FRP鋪放成型缺陷機理的研究。為了解決以上問題,本文針對熱塑性FRP,分析了其鋪放制造過程中常見的缺陷類型及其形成的基本原因,并結(jié)合氣泡成核、熱力耦合、界面增強理論及原位固結(jié)技術(shù)的國內(nèi)外研究成果,指出現(xiàn)階段FRP鋪放缺陷機理研究方法的不足,根據(jù)現(xiàn)有的多尺度分析法及材料設(shè)計的嵌套式關(guān)系,提出反串行嵌套式多尺度分析方法,并討論了基體的流動性、結(jié)晶度、黏彈性及吸濕性等微觀力學(xué)參數(shù)的分析和計算方法。最后,采用灰色關(guān)聯(lián)及多目標(biāo)優(yōu)化法,提出FRP鋪放成型工藝的多尺度協(xié)同設(shè)計方法。未來研究重點是在鋪放樣機應(yīng)用化的基礎(chǔ)上,分析工藝參數(shù)、成型缺陷與力學(xué)性能的關(guān)聯(lián)特性,揭示缺陷形成機理并優(yōu)化工藝參數(shù)。
[Abstract]:The forming process of automatic placement forming defects of fiber reinforced composites (FRP) involves many space-time scales. It is impossible to study the defect mechanism of FRP placement molding only by means of macroscopic failure theory and experimental analysis, in order to solve the above problems. Aiming at thermoplastic FRPs, this paper analyzes the common types of defects and the basic causes of their formation in the process of laying and manufacturing, and combines the research results of bubble nucleation, thermal coupling, interface enhancement theory and in situ consolidation technology at home and abroad. This paper points out the deficiency of the research method of FRP placement defect mechanism at present. According to the existing multi-scale analysis method and the nesting relation of material design, the multi-scale analysis method of row nesting is put forward, and the fluidity and crystallinity of matrix are discussed. The analysis and calculation method of micromechanical parameters such as viscoelasticity and hygroscopicity. Finally, grey correlation and multi-objective optimization method are used. This paper presents a multi-scale collaborative design method for FRP placement molding process. The emphasis of future research is to analyze the process parameters, the correlation characteristics of forming defects and mechanical properties on the basis of the application of laying prototyping. The mechanism of defect formation was revealed and the process parameters were optimized.
【作者單位】： 哈爾濱工業(yè)大學(xué)機電工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51005060) 國家數(shù)控專項課題(2014ZX04001091)
【分類號】：TB332

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本文編號：1550193