Research Papers

Rounded Cutting Edge Model for the Prediction of Bone Sawing Forces

[+] Author and Article Information
Thomas P. James

Laboratory for Biomechanical Studies, Department of Mechanical Engineering,  Tufts University, 200 College Avenue, Medford, MA 02155thomas.james@tufts.edu

John J. Pearlman, Anil Saigal

Laboratory for Biomechanical Studies, Department of Mechanical Engineering,  Tufts University, 200 College Avenue, Medford, MA 02155

J Biomech Eng 134(7), 071001 (Jul 02, 2012) (11 pages) doi:10.1115/1.4006972 History: Received December 31, 2011; Revised May 29, 2012; Posted June 18, 2012; Published June 29, 2012; Online July 02, 2012

A new analytical model to predict bone sawing forces is presented. Development of the model was based on the concept of a single tooth sawing at a depth of cut less than the cutting edge radius. A variable friction model was incorporated as well as elastic Hertzian contact stress to determine a lower bound for the integration limits. A new high speed linear apparatus was developed to simulate cutting edge speeds encountered with sagittal and reciprocating bone saws. Orthogonal cutting experiments in bovine cortical bone were conducted for comparison to the model. A design of the experiment’s approach was utilized with linear cutting speeds between 2600 and 6200 mm/s for depths of cut between 2.5 and 10 μm. Resultant forces from the design of experiments were in the range of 8 to 11 N, with higher forces at greater depths of cut. Model predictions for resultant force magnitude were generally within one standard deviation of the measured force. However, the model consistently predicted a thrust to cutting force ratio that was greater than measured. Consequently, resultant force angles predicted by the model were generally 20 deg higher than calculated from experimental thrust and cutting force measurements.

Copyright © 2012 by American Society of Mechanical Engineers
Topics: Force , Sawing , Bone , Cutting , Thrust
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 7

Hertzian contact stress model

Grahic Jump Location
Figure 1

Cutting model with a defined shear plane

Grahic Jump Location
Figure 2

Cutting model with plowing and chip creation

Grahic Jump Location
Figure 3

Rounded cutting edge model

Grahic Jump Location
Figure 4

Shear plane angle as a function of chip thickness ratio

Grahic Jump Location
Figure 6

Friction angle as a function of depth of cut

Grahic Jump Location
Figure 8

Cortical bone sample prepared for cutting test

Grahic Jump Location
Figure 9

Workpiece holder arrangement

Grahic Jump Location
Figure 10

High speed linear sawing apparatus

Grahic Jump Location
Figure 11

Results from design of experiments

Grahic Jump Location
Figure 12

Cutting force at each rake angle segment

Grahic Jump Location
Figure 13

Resultant force magnitude

Grahic Jump Location
Figure 14

Resultant force angle



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In