Comparison of Cortical Bone Fracture Patterns Under Compression Loading Using Finite Element-Discrete Element...

Area of Science:

• Biomechanics
• Computational modeling
• Materials science

Background:

• Finite element analysis (FEA) is a common method for analyzing bone fractures.
• Alternative computational methods may offer new insights into bone fracture mechanics.

Purpose of the Study:

• To compare bone fracture patterns from compression testing with those simulated using the finite discrete element method (FDEM).
• To establish FDEM as a viable tool for predicting bone fracture initiation and propagation.

Main Methods:

• A 3D bone model was created using CT scans.
• Compression testing was performed on bone specimens, with force and displacement data recorded.
• The finite element-discrete element method (FDEM) was employed, integrating finite element method (FEM) and discrete element method (DEM).
• CT imaging was used post-testing for comparison.
• Material properties were adjusted in the FDEM model to match experimental force-displacement data.

Main Results:

• Qualitative comparison of fracture patterns showed good agreement between experimental and FDEM simulations.
• The study successfully demonstrated the ability of FDEM to replicate observed bone fracturing.

Conclusions:

• The finite discrete element method (FDEM) can successfully simulate and predict bone fracturing.
• This study represents the first reported use of FDEM for analyzing bone fracture patterns.