微系统粗糙表面的多峰黏着弹性接触分析
发布时间：2018-08-30 15:00
【摘要】：在微系统中,粗糙表面间的黏着力是影响微尺度对象能否成功装配的主要因素。为研究微尺度对象粗糙表面的接触机理,将Maugius理论和分子作用的Kim物理接触理论相结合,建立了微尺度对象的多峰黏着弹性接触模型,应用三维分形几何进行黏着力的求解,并对Kim物理接触黏附半径做近似计算,且将新建模型与不考虑分子作用力的Morrow模型进行比较。分析结果表明:微凸体两粗糙表面的物理接触距离越小,对黏着影响越大;分形维数增加,微凸体物理接触的黏着作用显著增加;随着分形粗糙度减小,Kim物理接触的微凸体数目明显增多,黏着力显著增加。
[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.
【作者单位】： 内蒙古工业大学机械学院;
【基金】：内蒙古自然科学基金项目(2012MS0730)
【分类号】：TH117.1
，
本文编号：2213429
[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.
【作者单位】： 内蒙古工业大学机械学院;
【基金】：内蒙古自然科学基金项目(2012MS0730)
【分类号】：TH117.1
，
本文编号：2213429
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