SGER: Fundamental Examination of the Frictional Boundary Conditions in Machining Using Fractals

SGER：使用分形对加工中的摩擦边界条件进行基本检查

• 批准号: 9910219
• 负责人: Shivakumar Raman
• 金额: $ 5万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2001-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9910219&HistoricalAwards=false
• 关键词: SGER; Fundamental; Examination; Frictional; Boundary

The objective of this Small Grant for Exploratory Research (SGER)project is to develop a universal framework for representing the frictional boundary conditions at the tool-chip interface in machining based on fractal theory. Previous studies conducted using photomicrographs from literature provide justification for this approach. Mathematical models developed in preliminary work will be validated and improved with real experimental data. The fractal behavior of the tool-chip interface will be investigated, and the materials and cutting conditions leading to different fractal dimensions will be quantified. These dimensions will be used to determine the shape, size, location and proportion of sliding/sticking islands at the interface, which will then be used to calculate contact area, cutting forces, total power expended, and cutting temperatures. Comparison with traditional models will be conducted. This project has the potential of drawing new insight into the machining process and generating more accurate models of the process for the prediction of cutting forces, cutting temperatures, and tool wear. If successful, it should benefit cutting tool design, coating material development, and machining parameter selection.

这个探索性研究（SGER）项目的目标是开发一个通用框架，用于表示基于分形理论的加工中刀具-芯片界面的摩擦边界条件。先前使用文献中的显微照片进行的研究为这种方法提供了理由。在初步工作中建立的数学模型将用实际的实验数据进行验证和改进。研究了刀具-切屑界面的分形行为，量化了导致不同分形维数的材料和切削条件。这些尺寸将用于确定界面上滑动/粘岛的形状、大小、位置和比例，然后用于计算接触面积、切削力、总功率消耗和切削温度。将与传统模型进行比较。这个项目有可能为加工过程提供新的见解，并为预测切削力、切削温度和刀具磨损产生更准确的过程模型。如果成功，将有利于刀具设计、涂层材料开发和加工参数选择。