發(fā)布時間：2018-07-02 20:10

  本文選題：復(fù)合材料 + 毛圈織物　； 參考：《天津工業(yè)大學(xué)》2017年碩士論文

【摘要】：織物增強(qiáng)樹脂基復(fù)合材料因其輕質(zhì)高強(qiáng)等優(yōu)良的力學(xué)性能在各個領(lǐng)域都得到了廣泛的應(yīng)用,但受到外來沖擊時會在復(fù)合材料層間產(chǎn)生分層損傷,造成對材料使用壽命的限制,讓抑制分層、提高復(fù)合材料斷裂韌性成為該領(lǐng)域研究的重點(diǎn)問題。本文基于層間增韌思想,設(shè)計并織造一種新型織物——毛圈和毛絨織物作為增強(qiáng)材料。毛圈和毛絨織物增強(qiáng)復(fù)合材料是一種新型的機(jī)織復(fù)合材料,它利用織物表面形成的特殊結(jié)構(gòu)——Z向毛圈和毛絨,經(jīng)過層壓后在中層間與樹脂基體形成協(xié)同作用的增韌層,提高了復(fù)合材料層間斷裂韌性及抗沖擊能力。其主要研究內(nèi)容如下:針對毛圈和毛絨織物的壓縮性能進(jìn)行了研究,發(fā)現(xiàn)毛圈和毛絨織物壓縮后因織物表面的毛圈和毛絨在層間會形成具有孔隙的層間區(qū)域,導(dǎo)致毛圈和毛絨織物的可壓縮性劣于平紋織物,最終引起纖維體積含量的降低。通過VARI工藝制備復(fù)合材料層合板,研究了毛圈和毛絨織物增強(qiáng)復(fù)合材料層合板的基本力學(xué)性能,包括:拉伸、壓縮、彎曲及剪切性能。研究結(jié)果表明:由于復(fù)合材料層板纖維體積含量的降低,導(dǎo)致其拉伸強(qiáng)度、壓縮強(qiáng)度及彎曲強(qiáng)度均有不同程度的降低,而剪切強(qiáng)度沒有因纖維體積含量的降低而降低。因?qū)娱g毛圈和毛絨結(jié)構(gòu)與樹脂綜合作用的結(jié)果,導(dǎo)致剪切強(qiáng)度有1.43%-25.22%的上升,由此可見毛圈和毛絨結(jié)構(gòu)對層板層間力學(xué)性能作用顯著。通過進(jìn)行Ⅰ型、Ⅱ型層間斷裂韌性以及沖擊后剩余壓縮強(qiáng)度試驗研究了復(fù)合材料的斷裂韌性及抗沖擊性能。結(jié)果表明:毛圈和毛絨結(jié)構(gòu)的引入可有效提高層合板的斷裂韌性及承載能力,且毛絨結(jié)構(gòu)優(yōu)于毛圈結(jié)構(gòu)。8號毛絨織物(毛絨為尼龍)增強(qiáng)的復(fù)合材料相比未增韌的9號試樣,G1。增幅為87.07%;6號毛絨織物(毛絨為玻璃纖維)增強(qiáng)的復(fù)合材料,GⅡc增幅為34.62%。毛圈和毛絨結(jié)構(gòu)能夠有效提高復(fù)合材料的抗沖擊性能,4號試樣(毛圈織物增強(qiáng))的CAI增幅為26.70%,5號試樣(毛絨織物增強(qiáng))的CAI增幅為28.89%。
[Abstract]:Fabric reinforced resin matrix composites have been widely used in various fields because of their excellent mechanical properties such as light weight and high strength. However, when subjected to external impact, delamination damage will occur between the composite layers, resulting in the limitation of the service life of the materials. Reducing delamination and improving the fracture toughness of composites are the key problems in this field. Based on the idea of interlaminar toughening, a new type of fabric, woolen fabric and plush fabric, is designed and woven in this paper. Wool circle and wool fabric reinforced composite is a new type of woven composite material. It utilizes the special structure formed on the fabric surface Z direction wool circle and plush, after lamination, it forms the toughening layer of synergistic effect between the interlayer and the resin matrix. The interlaminar fracture toughness and impact resistance of the composites were improved. The main research contents are as follows: the compression properties of woolen and plush fabrics are studied. It is found that the interlaminar area with pores is formed between the wool circles and wool fabrics due to the compressing of woolen and plush fabrics. The compressibility of woolen and woolen fabrics is inferior to that of plain fabrics, resulting in the reduction of fiber volume content. Composite laminates were prepared by Vari process. The basic mechanical properties of laminated laminates reinforced by wool and plush fabrics were studied, including tensile, compression, bending and shear properties. The results show that the tensile strength, compression strength and flexural strength of laminated composite laminates decrease in varying degrees due to the decrease of fiber volume content, but the shear strength does not decrease because of the decrease of fiber volume content. The shear strength increased by 1.43% to 25.22% due to the combined effect of interlaminar wool and plush structure with resin. It can be seen that the effect of wool circle and plush structure on the interlaminar mechanical properties is remarkable. The fracture toughness and impact resistance of the composites were studied by means of the fracture toughness and residual compressive strength of mode 鈪，

本文編號：2090782