표면조도에 따른 자동차용 강재의 마찰튿성

다국어 초록 (Multilingual Abstract)

In sheet metal forming process, friction between sheet and tool plays an important role. The frictional behavior depends on local contact conditions such as local surface roughness profile, normal load and sliding speed. In case of steel sheets, rough surfaces are always generated in the roll process with the different types of texturing. Therefore, to understand the friction behavior in steel sheets, it is very important to consider the surface roughness profile. Many types of friction models have been reported in order to explain the role of 3-D surface topography. Recently, the mechanical-rheological friction model explains well the tribological characteristics of 3-D surface profile. In this paper, the friction behavior of steel sheets is investigated with the mechanical-rheological model based on mixed lubrication regime. For more accurate analysis, numerical rough contact analysis under lubricated condition is applied. From numerical contact analysis, contact, hydrostatic and hydrodynamic pressures can be obtained. And rotational friction test is applied in order to evaluate practical friction coefficients in forming process. The frictional behavior under lubricated conditions could be explained more suitably from the results.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 3차원 접촉해석
• 3. 마찰 상관성
• 4. 결론
• 참고문헌