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Fracture analysis for biological materials with an expanded cohesive zone model
Bingbing An1, Xinluo Zhao1, Dwayne Arola2
1Department of Physics, Shanghai University, Shanghai 200444, China.
Journal of Biomechanics
|June 1, 2014
Summary
This study introduces a new cohesive zone model to simulate bone fracture. The model accurately predicts crack growth resistance in bone and dentin, validating its effectiveness for biomaterials.
Area of Science:
- Biomaterials Science
- Computational Mechanics
- Mechanical Engineering
Background:
- Bone fracture simulation requires advanced models that capture complex material behaviors.
- Existing cohesive zone models have limitations in representing bone's composite structure.
Purpose of the Study:
- To develop a thermodynamically consistent cohesive zone model for simulating bone fracture.
- To investigate crack growth resistance in bone and bone-like materials.
Main Methods:
- An expanded cohesive zone model was developed, incorporating reversible elastic deformation, irreversible plastic deformation, and damage.
- Key mechanisms of biocomposite deformation (mineral platelets, protein layers) were integrated.
- Numerical simulations were performed for cortical bone and human dentin.
Main Results:
- The model successfully simulated crack nucleation and propagation.
- Simulations showed good agreement with experimental data for cortical bone and dentin.
- The model effectively captured the fracture behavior of bone-like materials.
Conclusions:
- The proposed cohesive zone model provides a robust framework for bone fracture simulation.
- This approach enhances the understanding of fracture mechanics in biological tissues.
- The model is effective for predicting the mechanical performance of bone-like materials.
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