Document Type

Dissertation

Degree

Doctor of Philosophy (PhD)

Department

Mechanical Engineering

First Advisor's Name

Benjamin Boesl

First Advisor's Committee Title

Committee Co-chair

Second Advisor's Name

W. Kinzy Jones

Second Advisor's Committee Title

Committee Co-Chair

Third Advisor's Name

Kinzy Jones Jr.

Third Advisor's Committee Title

committee member

Fourth Advisor's Name

Aravind Agarwal

Fourth Advisor's Committee Title

committee member

Fifth Advisor's Name

Norman D.H. Munroe

Fifth Advisor's Committee Title

committee member

Keywords

stress shielding, hip implants, 3d woven composites, FEA, microanalysis

Date of Defense

11-2-2015

Abstract

The present research focuses on analyzing the possibility of implementing three dimensional woven composite (3DWC) materials in hip implants. The integration of 3DWCs in hip implants has the possibility to both extend the life-time and improve patient outcomes; by spatially varying mechanical properties to meet both biological needs as well as required mechanical loading. In this study, the bulk material properties of 3DWCs were varied based on woven composite architecture and determined using physics based models, which reflect the realistic geometries of fibers in compaction and preform. The multi-digital chain method combined with Extended Finite Elemental Analysis (XFEA) are adopted in this micro-analysis for composite design. Four different woven architectures with a combination of different existing biocompatible fiber and resins are considered in this study. The main objective is to assess the mechanical response of these biocompatible materials in the design of 3D woven architectures and determine their ability to match the required modulus at different regions of a hip implant. Results obtained show 3DWCs are viable candidates for this application. Multiple architectures and materials chosen, were able to achieve the desired mechanical response. Additional studies can use these results as a starting point and framework for further mechanical and biological testing.

Identifier

FIDC000215

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