【摘要】：在微系統(tǒng)中,粗糙表面間的黏著力是影響微尺度對(duì)象能否成功裝配的主要因素。為研究微尺度對(duì)象粗糙表面的接觸機(jī)理,將Maugius理論和分子作用的Kim物理接觸理論相結(jié)合,建立了微尺度對(duì)象的多峰黏著彈性接觸模型,應(yīng)用三維分形幾何進(jìn)行黏著力的求解,并對(duì)Kim物理接觸黏附半徑做近似計(jì)算,且將新建模型與不考慮分子作用力的Morrow模型進(jìn)行比較。分析結(jié)果表明:微凸體兩粗糙表面的物理接觸距離越小,對(duì)黏著影響越大;分形維數(shù)增加,微凸體物理接觸的黏著作用顯著增加;隨著分形粗糙度減小,Kim物理接觸的微凸體數(shù)目明顯增多,黏著力顯著增加。
[Abstract]:In microsystems, the adhesion between rough surfaces is the main factor that affects the successful assembly of micro-objects. In order to study the contact mechanism of rough surface of microscale object, a multi-peak adhesive elastic contact model of micro-scale object was established by combining Maugius theory with Kim physical contact theory of molecular interaction, and 3D fractal geometry was used to solve the adhesion. The Kim physical contact adhesion radius is approximately calculated, and the new model is compared with the Morrow model which does not take into account the molecular force. The results show that the smaller the physical contact distance between the two rough surfaces of the microconvex body, the greater the impact on the adhesion, and the greater the fractal dimension, the greater the adhesion of the physical contact of the microconvex body. With the decrease of fractal roughness, the number of micro-convex bodies in physical contact with Kim increases obviously, and the adhesion increases significantly.
【作者單位】： 內(nèi)蒙古工業(yè)大學(xué)機(jī)械學(xué)院;
【基金】：內(nèi)蒙古自然科學(xué)基金項(xiàng)目(2012MS0730)
【分類號(hào)】：TH117.1
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本文編號(hào)：2213429