Brittle Fracture of Refractory Cutting Tools

耐火材料切削工具的脆性断裂

• 批准号: 8514215
• 负责人: Milton Shaw
• 金额: $ 13.59万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-01-15 至 1988-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8514215&HistoricalAwards=false
• 关键词: Brittle; Fracture; Refractory; Cutting; Tools

This project involves theoretical and experimental research on the causes of fracture in cutting tools. Prior research has shown that for carbide tools the strain of fracture is the same under static and dynamic conditions for uniaxial tension and that fracture occurs without plastic flow. This research also showed that when the forces are mainly compressive, plastic flow occurs before fracture. This research will be extended to ceramics and cermets; however, the main focus will be on studying the compressive forces that occur during rapid loading and unloading of the tool, at the beginning and the end of a cut. The research will involve both cutting experiments and finite element analysis of tool tip stresses.

本项目涉及对生物质的理论和实验研究， 刀具断裂的原因。 此前的研究表明，对于 硬质合金刀具的断裂应变在静态和 单轴拉伸和断裂发生的动力学条件 没有塑性流动。 这项研究还表明， 主要是压缩，塑性流动发生在断裂之前。 这 研究将扩展到陶瓷和金属陶瓷;然而，主要的 重点将是研究压缩力发生在 在开始和结束时快速装载和卸载工具 的削减。 这项研究将涉及切割实验， 刀尖应力的有限元分析