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Macrodamage Accumulation Model for a Human Femur.

Farah Hamandi1, Tarun Goswami1,2,3

  • 1Department of Biomedical, Industrial and Human Factors Engineering, Wright State University, Dayton, OH 45435, USA.

Applied Bionics and Biomechanics
|September 28, 2017
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Summary

This study investigated bone tissue

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Area of Science:

  • Orthopaedic biomechanics
  • Biomaterials science
  • Computational modeling

Background:

  • Bone fracture prediction is crucial in orthopaedics.
  • Understanding mechanical behavior aids in developing bone implants.
  • Existing models require refinement for accurate failure prediction.

Purpose of the Study:

  • To investigate macro-damage accumulation models in bone tissue.
  • To develop an accurate computational model for bone fracture prediction.
  • To explore alternative materials for bone implants based on mechanical behavior.

Main Methods:

  • Detailed discussion of phenomenological bone damage models.
  • Creation of a 3D finite element model of the femur using MIMICS and ANSYS®.
  • Simulation of the femur as a composite structure under cyclic loading for fatigue analysis.

Main Results:

  • Damage accumulates faster under multiaxial loading compared to uniaxial loading.
  • Bone failure initiates in the cortical bone.
  • Damage accumulation follows a three-stage growth pattern: primary, secondary (linear), and tertiary leading to failure.

Conclusions:

  • The developed finite element model provides insights into bone's mechanical behavior and fracture.
  • Findings support the development of more effective bone implant materials.
  • The composite nature of bone significantly influences its stiffness and mechanical response.