AI 中文总结
研究粗糙表面塑性平滑，提出新方法获塑性变形表面有效功率谱用于佩尔松接触力学理论，给出相关表面高度形貌结果并与实验对比，还讨论了塑性变形后表面粗糙度变化原因。
AI 中文摘要
当两个金属块挤压在一起时，粗糙接触区域的应力通常很大，以至于粗糙部分至少在短长度尺度上发生塑性变形。许多接触的摩擦学特性，如接触刚度、电和热接触电阻以及界面处的流体流动，都取决于表面形貌，因此会因塑性流动而改变。本文提出一种新方法，用于在佩尔松接触力学理论中获得塑性变形表面的有效功率谱。还给出了使用塑性修改功率谱得到的表面高度形貌结果，并与Yusof和Ripin研究塑性流动对光滑钢表面与粗糙钢表面挤压时形貌影响的实验结果进行比较。最后，讨论了为何一些表面塑性变形后具有与变形前相似的高斯粗糙度，只是粗糙度幅度较小，而其他表面塑性变形后粗糙度非常不对称。
英文摘要
When two metal blocks are squeezed together the stresses in the asperity contact regions are usually so large that the asperities deform plastically, at least at short length scales. Many tribology properties of contacts, such as the contact stiffness and the electric and thermal contact resistance, and the fluid flow at interfaces, depend on the surface topography and are hence modified by the plastic flow. Here I present a new way to obtain an effective power spectra of plastically deformed surfaces to be used in the Persson contact mechanics theory. I also present results for the surface height topography obtained using the plastically modified power spectra, and compare to the experimental results of Yusof and Ripin, who studied the influence of plastic flow on the topography for a smooth steel surface squeezed against a rough steel surface. Finally, I discuss why some surfaces after plastic deformation have similar Gaussian roughness as before plastic deformation, only with smaller roughness amplitude, while other surfaces shows very skewed roughness after plastic deformation.
