Orthogonal cutting of cortical bone: Temperature elevation and fracture toughness
Orthogonal cutting of cortical bone: Temperature elevation and fracture toughness
复制标题
DOI：
10.1016/j.ijmachtools.2017.03.009
复制
发表时间：
2017-08
影响因子：
14
通讯作者：
Arne Feldmann;P. Ganser;L. Nolte;P. Zysset
中科院分区：
文献类型：
--
作者：
Arne Feldmann;P. Ganser;L. Nolte;P. Zysset
在手术过程中，骨切割的热发展会导致热细胞坏死和二次种植体不稳定。因此，有关热开发和温度控制的基础知识至关重要。本文研究了正交法加工皮质骨的基本原理。对两种不同的前倾角和六种不同的切屑深度进行了切削力、温升和切屑形成的实时测量。切削深度与切削力和温升之间存在非线性关系。随着切割深度的增加，切割行为由延性断裂切割转变为两种不同的断裂切割模式。切削力与骨屑和工件的温升呈线性相关(R2=0.8697)。前角的增大显著降低了切削力和温升，并用断裂力学方法进行了解释。此外，还介绍了一种利用正交试验计算(准)脆性材料断裂韧度的新方法。
During surgical procedures, the heat development of bone cutting can lead to thermal cell necrosis and secondary implant instability. Therefore, fundamental knowledge on heat development and temperature control is crucial. This paper investigates the basic principles of the machining of cortical bone in an orthogonal cutting process. Cutting forces, temperature elevation and chip formation were measured in real time for two different rake angles and six different cutting depths. A non-linear relationship between cutting depth and cutting forces as well as temperature elevation was found. The cutting behavior changed from a ductile to two distinguishable fracture cutting modes with increasing cutting depth. A linear correlation between cutting forces and temperature elevation of both bone chip and workpiece was determined (R 2= 0.8697). An increasing rake angle lowered cutting forces and temperature elevations significantly and was explained using a fracture mechanics approach. Additionally, a new method to calculate the fracture toughness of (quasi-) brittle materials from orthogonal cutting tests was introduced.