Research of Fracture Mechanics Applied in the Cutting Process of Plastic Metals

断裂力学在塑性金属材料切削过程中应用的研究现状

¹ College of Mechanical Engineering, Guizhou University, Guiyang 550025, China
² Key Laboratory of Advanced Manufacturing Technology of the Ministry of Education, Guizhou University, Guiyang 550025, China

Received: 25 January 2019

Abstract

Shear theory is the mainstream view to explain the cutting process. Because of the complexity of the cutting process, it is still difficult to explain and predict the physical phenomena in the cutting process accurately by shear theory. While some physical phenomena can be well explained by fracture theory. At the same time, with the development of fracture theory, fracture phenomenon in cutting process has attracted scholarsattention again. Therefore, the early development and current application of fracture theory in the study of cutting process are reviewed in detail. The research results and key points of fracture theory in cutting process are summarized. The development direction of fracture theory in the cutting process is briefly discussed. It is considered that the integration of fracture theory and shear theory is an effective way to study cutting mechanism, and the cutting process is divided into six stages in order to integrate fracture and shear theory.

摘要

剪切理论是解释切削过程的主流观点，由于切削过程的复杂性，切削过程的物理现象使用剪切理论依然很难解释和准确预测。而有些物理现象恰恰使用断裂理论能够很好地解释，因此，随着断裂理论的成熟和发展，切削过程中的断裂现象又重新引起学者的关注。为总结断裂理论在切削过程的研究成果和关注重点，详细回顾断裂理论在研究切削过程中早期的发展和目前的应用，并简要讨论了断裂理论在研究切削过程中的发展方向，认为将断裂理论和剪切理论有机融合是研究切削机理的有效途径，并提出将切削过程分为6个阶段进行分析，以期将断裂理论和剪切理论进行融合分析。