本文關(guān)鍵詞：輪胎與瀝青路面微觀摩擦接觸特性的分子動力學(xué)模擬　出處：《工程科學(xué)學(xué)報》2016年06期 　論文類型：期刊論文

  更多相關(guān)文章： 輪胎 瀝青路面 摩擦 接觸 分子動力學(xué)模擬

【摘要】：為了精確表征輪胎與路面微觀摩擦接觸特性及分子作用力效應(yīng),利用分子動力學(xué)模擬分析方法建立輪胎(聚異戊二烯)和集料(二氧化硅)三維單體模型和界面接觸模型,在納米尺度上研究輪胎和集料的微觀構(gòu)造和接觸特性.模擬結(jié)果表明:鏈狀聚異戊二烯分子鏈為螺旋狀結(jié)構(gòu),分子間隙較大,易產(chǎn)生較大變形,而二氧化硅則為典型脆性材料,表面較為平整;界面接觸模型以二氧化硅為固定基底,聚異戊二烯單鏈在其上勻速滑動,二者間距離為0.5 nm.接觸界面摩擦特性模擬結(jié)果表明摩擦系數(shù)隨著速度增加而變小,其變化趨勢與實(shí)驗(yàn)結(jié)果相同,證明模擬結(jié)果有效.
[Abstract]:In order to accurately characterize the contact characteristics of micro friction between tire and road surface and the effect of molecular force. Three dimensional monomer model and interface contact model of tire (polyisoprene) and aggregate (silica) were established by molecular dynamics simulation. The microstructure and contact characteristics of tire and aggregate were studied on nanometer scale. The simulation results show that the chain polyisoprene molecular chain is spiral structure, the molecular gap is large, and it is easy to produce large deformation. Silica is a typical brittle material with a flat surface. The interfacial contact model is based on silica, on which the polyisoprene single chain glides at a uniform rate. The distance between them is 0.5 nm. The simulation results show that the friction coefficient decreases with the increase of velocity, and the variation trend is the same as the experimental results, which proves that the simulation results are effective.
【作者單位】： 北京科技大學(xué)國家材料服役安全科學(xué)中心;
【基金】：國家自然科學(xué)基金資助項目(51308042,41372320)
【分類號】：U461.51
【正文快照】： 瀝青路面是我國道路工程中使用最為廣泛的路面類型.據(jù)交通運(yùn)輸部公布的數(shù)據(jù):截至2009年6月,我國高速公路通車?yán)锍踢_(dá)7.5萬km,其中90%以上采用瀝青路面[1].車輛行駛過程中,輪胎與瀝青路面接觸界面所產(chǎn)生的摩擦力是控制行車軌跡與速度的本源,高速公路通常要求具有較好的抗滑性能(，

本文編號：1439966