CAJ | 학술논문

当两个粗糙面在力的作用下相互接触时，只有表面上的微凸体相互接触。这些微凸体的接触影响着接触面的摩擦、磨损并且决定着两接触面之间的导电性和热传递功能。这些微凸体存在于各个不同的尺度下，并且形状也不相同。运用堆叠式多尺度接触模型对典型的加工表面进行分析，研究多尺度粗糙度对接触面真实接触面积的影响。结果表明，在塑性接触和弹塑性接触情况下，接触表面的多尺度粗糙度对于真实的接触面积和接触力均都有着很大的影响，不同表面之间的接触面积和平均接触压力以一个数量级的大小变化。研究结果表明某些加工工艺得到的表面或许更适合于作为设备中相互接触的表面。
당량개조조면재력적작용하상호접촉시，지유표면상적미철체상호접촉。저사미철체적접촉영향착접촉면적마찰、마손병차결정착량접촉면지간적도전성화열전체공능。저사미철체존재우각개불동적척도하，병차형상야불상동。운용퇴첩식다척도접촉모형대전형적가공표면진행분석，연구다척도조조도대접촉면진실접촉면적적영향。결과표명，재소성접촉화탄소성접촉정황하，접촉표면적다척도조조도대우진실적접촉면적화접촉력균도유착흔대적영향，불동표면지간적접촉면적화평균접촉압력이일개수량급적대소변화。연구결과표명모사가공공예득도적표면혹허경괄합우작위설비중상호접촉적표면。
When rough surfaces are brought into contact under typical loads,only the peaks or asperities come into con?tact.The contacts between these asperities govern the friction and wear,and also constrict the conduction of electricity and heat.The asperities exist on many different magnitudes of scales and can also vary in shape.A stacked multiscale contact model was used to analyze the structure of typical engineering surfaces,and the influence of multiscale roughness on the re?al contact area between surfaces was investigated.The results show that the multiscale roughness of surfaces,as described by the aspect ratio of each scale,can greatly influence the real contact area and pressure by several orders of magnitude in both the elastic and elastic?plastic regimes.This demonstrates that certain types of machining processes maybe better suited to contact applications.