Effects of Asperities on Stiction and Its Transition to Dynamic Friction in Automotive Latch Parts

汽车闩锁零件中粗糙度对静摩擦力的影响及其向动态摩擦的转变

• 批准号: 543789-2019
• 负责人: BoakyeYiadom, Solomon
• 金额: $ 1.82万
• 依托单位: York University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680614
• 关键词: Effects; Asperities; Stiction; Its; Transition

Even when a solid surface looks very flat and smooth, it is rough microscopically with surface asperities in the micro and nanometer scale. These asperities result in unevenness of surfaces and roughness which affects interfacial behaviour such as occurs in low friction surfaces, creaking doors and brake sounds. When two contacting surfaces move relative to each other, frictional force is contributed by adhesion and deformation of the contacting asperities. This has a significant effect on the amount of load needed to initiate sliding of the contacting surfaces including the quality of the seal that is created by the contacting surfaces. Characterizing the effect of surface asperities on stiction and adhesion including its transition to dynamic friction is essential in developing automotive latch parts that reduces the amount of force needed to open and close a car door including creating a quieter cabin as a result of increased sealing provided by the contacting surfaces. Magna Closures, division of Magna International Inc., is a Canadian global automotive supplier headquartered in New Market, Ontario and it is the largest automobile parts manufacturer in North America by sales of original equipment parts, and one of Canada's largest companies. Magna is developing novel automotive latch parts that improves door quality and cabin quietness, which for automakers, are two key customer satisfaction considerations. This project will provide critical experimental data on the frictional forces including the effect of surface asperities on stiction, adhesion and their transition to dynamic friction for the automotive latch parts.

即使固体表面看起来非常平坦和光滑，但在微观上它是粗糙的，具有微米和纳米尺度的表面粗糙度。这些凹凸不平导致表面不均匀和粗糙度，从而影响界面行为，例如低摩擦表面、吱吱作响的门和刹车声音。当两个接触面相对运动时，接触凹凸的粘附和变形会产生摩擦力。这对启动接触表面滑动所需的负载量（包括由接触表面产生的密封的质量）具有显着影响。表征表面粗糙度对静摩擦力和粘附力的影响（包括其向动态摩擦的转变）对于开发汽车闩锁零件至关重要，该零件可以减少打开和关闭车门所需的力，包括通过增强密封性来创建更安静的驾驶室。接触表面。 Magna Closures 是麦格纳国际公司 (Magna International Inc.) 的子公司，是一家加拿大全球汽车供应商，总部位于安大略省新马克特 (New Market)，是北美原装备件销量最大的汽车零部件制造商，也是加拿大最大的公司之一。麦格纳正在开发新型汽车门锁部件，以提高车门质量和驾驶室安静度，这对于汽车制造商来说是两个关键的客户满意度考虑因素。该项目将提供有关摩擦力的关键实验数据，包括表面粗糙度对静摩擦力、粘附力的影响及其向汽车闩锁部件动态摩擦的转变。