本文選題：網絡結構 + 復合材料　； 參考：《濟南大學》2015年碩士論文

【摘要】：網絡互穿復合材料是一種以三維連續(xù)網格結構作為增強相的新型材料,目的是為了提高材料的綜合性能,相比于離散相增強的復合材料,網絡互穿復合材料具有更加優(yōu)越的力學性能。本文采用車削實驗以及有限元分析軟件對網絡互穿復合材料進行了切削實驗與仿真研究。根據具體實驗需要,設計并編織了包含軸向分布、徑向分布以及周向分布的三維網絡結構增強相,采用無壓力浸透法制備了基體相材料為ZL107,增強相材料為0Cr18Ni9的網絡互穿復合材料,并總結了其制備中的關鍵工藝技術與方法。通過車削實驗,研究了表面粗糙度隨切削用量的變化規(guī)律,總結了增強相的不同破壞形式,歸納了切削加工表面存在的各種缺陷,并分析了其形成機理,同時研究了不同密度分布增強相對兩相材料界面結合處切削力變化的影響程度。結果表明:由于增強相的存在,致使網絡互穿復合材料加工表面質量嚴重下降,其表面粗糙度普遍高于單一勻質材料,并且出現了增強相凸起、基體撕裂、增強相已加工表面的涂覆現象以及基體表面微裂紋等缺陷,切削過程也很不穩(wěn)定,在增強相分布密集處,切削力波動幅度較大,且需較長時間才能恢復平穩(wěn)。以實驗為基礎,建立了網絡互穿復合材料的二維切削模型,通過不同形式的仿真分析,驗證了此模型的可行性,與此同時,分析了增強相各種形式下不同切削階段的應力分布特點,結果表明:網絡結構增強相比單一結構增強相具有更好的穩(wěn)定性,有效防止了增強相在切削過程中的過度變形,減少了增強相與基體相界面之間的破壞程度。
[Abstract]:The network interpenetrating composite is a new type of material with three-dimensional continuous mesh structure as the reinforcement phase. The purpose of this material is to improve the comprehensive properties of the material, compared with the composite reinforced by discrete phase. Network interpenetrating composites have better mechanical properties. In this paper, cutting experiments and simulation of interpenetrating composites are carried out by means of turning experiment and finite element analysis software. According to the need of the experiment, a three-dimensional network structure enhancement phase including axial distribution, radial distribution and circumferential distribution is designed and woven. The network interpenetrating composites with ZL107 matrix and 0Cr18Ni9 reinforced phase were prepared by pressureless immersion method, and the key technology and methods in the preparation were summarized. Through turning experiments, the variation of surface roughness with cutting parameters is studied, the different failure forms of reinforcing phase are summarized, the defects of machined surface are summarized, and the formation mechanism is analyzed. At the same time, the influence of different density distribution on the cutting force change at the interface of the two phase material was studied. The results show that due to the existence of reinforcement phase, the machined surface quality of interpenetrating network composites is seriously reduced, the surface roughness is generally higher than that of single homogeneous material, and the reinforcement phase protrudes and the matrix tears occur. The cutting process is also unstable due to the coating phenomenon on the machined surface of the reinforced phase and the microcracks on the substrate surface. The cutting force fluctuates greatly in the dense distribution of the enhanced phase and takes a long time to recover steadily. On the basis of experiments, a two-dimensional cutting model of interpenetrating network composites is established. The feasibility of the model is verified by simulation analysis in different forms, at the same time, The characteristics of stress distribution in different cutting stages of reinforcement phase are analyzed. The results show that the enhancement of network structure has better stability than that of single structure enhancement phase, which effectively prevents the excessive deformation of reinforcement phase in the cutting process. The failure degree between reinforcing phase and matrix phase interface is reduced.
【學位授予單位】：濟南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TB33

【參考文獻】

相關碩士學位論文 前1條

1 諶偉;碳化硅泡沫陶瓷/鋁基復合材料制備及其耐磨性研究[D];南昌大學;2014年

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本文編號：1785489