發(fā)布時(shí)間：2018-08-03 12:11

【摘要】：目前，在金屬?gòu)?fù)合材料領(lǐng)域，鈦基復(fù)合材料在眾多工業(yè)領(lǐng)域的廣泛應(yīng)用已經(jīng)給很多行業(yè)帶來(lái)了方便，憑借其自身耐高溫、抗腐蝕能力強(qiáng)、二次加工性好等優(yōu)異的綜合性能，目前已被大規(guī)模地應(yīng)用在航海、石油、化工、飛機(jī)制造等領(lǐng)域。鈦基復(fù)合材料按照其增強(qiáng)方式，可分為連續(xù)纖維增強(qiáng)型和顆粒增強(qiáng)型兩大類。但由于纖維增強(qiáng)型鈦基復(fù)合材料存在各向異性，制造技術(shù)復(fù)雜，成本較高等原因。所以，國(guó)內(nèi)外眾多科研學(xué)者已經(jīng)開(kāi)始將研究顆粒增強(qiáng)型鈦基復(fù)合材料的力學(xué)性能作為新階段主要的科研方向和目標(biāo)，并且經(jīng)過(guò)眾多實(shí)驗(yàn)及數(shù)據(jù)的探索，已經(jīng)收獲了豐碩的科研成果，為顆粒增強(qiáng)型鈦基復(fù)合材料的發(fā)展提供了有利的理論依據(jù)。 本文基于顆粒增強(qiáng)型鈦基復(fù)合材料的有限元模型，利用大型通用結(jié)構(gòu)分析軟件ANSYS，，在細(xì)觀模型中分析復(fù)合材料的綜合力學(xué)性能，并對(duì)復(fù)合材料中基體與增強(qiáng)體之間的相互關(guān)系和相互影響展開(kāi)了探索及討論，主要包括以下內(nèi)容： （1）建立有限元模型，考察不同增強(qiáng)體顆粒形狀對(duì)鈦基復(fù)合材料界面應(yīng)力分布的影響。分別建立模型并分析圓球形顆粒、圓柱形顆粒時(shí)應(yīng)力場(chǎng)的不同分布情況，結(jié)果表明：圓球形顆粒對(duì)顆粒增強(qiáng)鈦基復(fù)合材料增強(qiáng)效果較好。 （2）建立碳納米管增強(qiáng)鈦基復(fù)合材料的三維分析模型，通過(guò)分別施加受壓載荷及拉伸載荷并觀察其應(yīng)力云圖結(jié)果。研究發(fā)現(xiàn)，兩種載荷作用下，基體中碳納米管的頂部位置，應(yīng)力變化均比較明顯地呈現(xiàn)急劇變化趨勢(shì)，而在碳納米管中部位置，變化均趨于平緩，在此區(qū)域上應(yīng)力為一個(gè)穩(wěn)定值。因此，在碳納米管中部區(qū)域所受的載荷傳遞充分。 ⑶利用ANSYS建立三維碳納米管增強(qiáng)鈦基復(fù)合材料分析模型，考察當(dāng)碳納米管處于不同相位角分布時(shí)，對(duì)復(fù)合材料界面應(yīng)力分布的不同影響。通過(guò)結(jié)果比較，當(dāng)相位角為＝15o時(shí)，顆粒增強(qiáng)鈦基復(fù)合材料的增強(qiáng)效果較好。
[Abstract]:At present, the extensive application of titanium matrix composites in many industrial fields has brought convenience to many industries, with its excellent comprehensive properties such as high temperature resistance, strong corrosion resistance, good secondary processing, and so on. At present, it has been widely used in navigation, petroleum, chemical industry, aircraft manufacturing and so on. Titanium matrix composites can be divided into continuous fiber reinforced type and particle enhanced type according to their reinforcement mode. However, due to the anisotropy of fiber reinforced titanium matrix composites, the manufacturing technology is complex and the cost is high. Therefore, many researchers at home and abroad have begun to study the mechanical properties of particulate reinforced titanium matrix composites as the main research direction and goal in the new stage, and through many experiments and data exploration, Abundant scientific research results have been obtained, which provides a favorable theoretical basis for the development of particle reinforced titanium matrix composites. Based on the finite element model of particle reinforced titanium matrix composite, the comprehensive mechanical properties of the composite are analyzed in the mesoscopic model by using the large-scale general structure analysis software ANSYS. The relationship and interaction between matrix and reinforcements in composites are discussed. The main contents are as follows: (1) the finite element model is established. The effect of particle shape of different reinforcements on the interfacial stress distribution of titanium matrix composites was investigated. The different distributions of the stress field of spherical and cylindrical particles were established and analyzed respectively. The results show that the spherical particles have a good effect on the reinforced titanium matrix composites. (2) the three-dimensional analysis model of carbon nanotube reinforced titanium matrix composites is established. The results of stress cloud diagram were observed by applying compressive load and tensile load respectively. It is found that the stress changes at the top of the carbon nanotubes in the matrix show a sharp change trend under the action of two kinds of loads, while in the middle of the carbon nanotubes, the changes tend to be gentle. The stress in this region is a stable value. Therefore, the load transfer in the middle region of carbon nanotubes is sufficient. 3 using ANSYS to establish a three-dimensional analysis model of carbon nanotube reinforced titanium matrix composites, and to investigate the distribution of carbon nanotubes at different phase angles. Different effects on interfacial stress distribution of composites. The results show that when the phase angle is 15 o, the effect of particle reinforced titanium matrix composites is better.
【學(xué)位授予單位】：沈陽(yáng)工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB333

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