仿生弯曲形切削工具切削性能的二维有限元分析  

2D FINITE ELEMENT ANALYSIS FOR THE CUTTING PERFORMANCE OF BIONIC CURVED CUTTING TOOLS

作　　者：郭志军[1] 周志立[1] 任露泉[2] 

机构地区：[1]河南科技大学机械设计工程系,洛阳471003 [2]吉林大学

出　　处：《机械工程学报》2003年第9期106-109,共4页Journal of Mechanical Engineering

基　　金：国家自然科学基金(59835200)

摘　　要：自然界中的某些动物在长期的土壤环境生活过程中,其爪趾经过亿万年的进化,逐步形成了具有特定曲率的几何形状,表现出优良的减粘脱土减阻功能。这为改进切削工具几何形状,乃至优化其在切削过程中的力学性能提供了仿生研究的基础。观测了田鼠爪趾几何形态特征,分析了其轮廓线的曲率变化规律。在此基础上,引入纵深比的概念,采用二维有限元法分析了田鼠爪趾与土壤的相互作用过程,探讨了该种爪趾切削力学性能优越性的基本规律和原因,为切削部件的仿生优化设计提供了可靠的生物力学信息。Some animals living in soil environments have claws of optimum biomechanical function such that the geometric shape is suited for anti-adhesion against soil thereby reducing adhesion and resistance, with which the bionic researching base for ameliorating the geometric shapes of cutting tools and optimizing their mechanical performance during cutting process is provided. The cutting performance of the toe of a field mouse's claw, after inducting the concept of longitudinal/depth ratio, is analyzed with a FEM based on the observe and analysis about the geometric characteristics of animals' claw, and the basic laws and reasons for the superiority of mechanical performance during cutting process by animals' claw are surveyed, with which the reliable biologic information for the bionic design of cutting components is provided.

关 键 词：仿生弯曲形切削工具 切削性能 二维有限元分析 仿生学 田鼠 爪趾 土壤 

分 类 号：TG7[金属学及工艺—刀具与模具] Q811[生物学—生物工程]