Modeling on effect of drill geometry for bone drilling

Lee, Yong Seng (2015) Modeling on effect of drill geometry for bone drilling. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

	Text (1 page) Modeling on Effect of Drill Geometry for Bone Drilling 1 Pages.pdf - Submitted Version Restricted to Registered users only until 29 June 2020. Download (68kB)
	Text (Full Text) Modeling on Effect of Drill Geometry for Bone Drilling.pdf - Submitted Version Restricted to Repository staff only Download (2MB)

Abstract

Bone is a biological rigid. Drilling of bone is normally required in orthopedic operations for allocation of screw for bone recovery. Different drill geometry may give different effect on the heat generation and thrust force on bone. Web thickness, point angle and helix angle are the drill geometry factors studied. So, modeling of bone drilling process by DEFORM-3D to simulate the effect of axial thrust force and heat generation on bone in order to prevent thermal osteonecrosis. Finite element simulation is applied because the process variables are difficult to measure and directly measurable from the cutting process. There are 2 stages of methodology. During stage 1, there is validation of modeling data by experiment with bovine femur bone and 420B stainless steel with different speed and feed is conducted. During stage 2, simulation is preceded with 17 different combination of drill geometry by using the validated model setting. Response surface methodology is used to design the experiment and ANOVA method is used to analysis the data. There are 10 optimized solutions suggested in this study. First solution (31.92% web thickness, 90° point angle, 31.32° helix angle) and second solution (32% web thickness, 90° point angle, 31.33° helix angle) are predicted as highly desirable in producing lowest axial thrust force and heat generation.

Actions (login required)

View Item