Computational Modeling of Skull Bone Structures and Simulation of Skull Fractures Using the YEAHM Head Model
Abstract
:1. Introduction
2. Materials and Methods
2.1. Skull Modeling
- Construction of the model: with solid finite elements it is possible to quickly make geometrical adjustments to the model and adapt zones more easily than in the case of shells. In addition, since the head is also a layered structure itself (meninges, skull, scalp, etc.), solid elements make it easier to model additional layers in future works.
- Solids also have the advantages of handling double contact better and have a more accurate description of the stress gradient over the thickness, contrary to shells based on plane stress assumptions. Full 3D material laws can be employed without simplifying assumptions like in the case of shells.
- Solid elements are more appropriate than shell elements to study the fracture phenomena of the skull.
2.1.1. Geometrical Modeling
2.1.2. Material Modeling
2.2. Skull Model Validation
2.2.1. Trabecular Bone Compression—Local Material Validation
2.2.2. Skull Vertex Impact Experiment—Blunt Trauma from Direct Impact against a Stationary Skull
2.2.3. Lateral Head Impact Experiment—Three Impacts at Different Velocities Simulating Falls
2.2.4. Blunt Ballistic Temporo-Parietal Head Impacts
3. Results
3.1. Trabecular Bone Compression—Local Material Validation
3.2. Skull Vertex Impact Experiment—Blunt Trauma from Direct Impact against Stationary Skull
3.3. Lateral Head Impact Experiment—Three Impacts at Different Velocities Simulating Falls
3.4. Blunt Ballistic Temporo-Parietal Head Impacts
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Tissue Type | Density (kg/m3) | Young Modulus (MPa) | Poisson’s Ratio |
---|---|---|---|
Cortical | 1900 | 20,000 | 0.21 |
Sutures | 2100 | 15,000 | 0.3 |
Bone Structure | Thickness (mm) | Standard Deviation (mm) |
---|---|---|
Outer Table | 0.76 | ±0.29 |
Inner Table | 0.35 | ±0.15 |
Trabeculae | 5.08 | ±2.01 |
Location | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
---|---|---|---|---|---|---|---|---|---|---|
Skull Thickness (mm) | 6.1 | 7.1 | 5.7 | 6.3 | 7.3 | 7.8 | 6.3 | 7.3 | 6.9 | 5 |
Deviation from the Average (mm) | 0.1 | 0.9 | 0.5 | 0.1 | 1.1 | 1.6 | 0.1 | 1.1 | 0.7 | 1.2 |
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Barbosa, A.; Fernandes, F.A.O.; Alves de Sousa, R.J.; Ptak, M.; Wilhelm, J. Computational Modeling of Skull Bone Structures and Simulation of Skull Fractures Using the YEAHM Head Model. Biology 2020, 9, 267. https://doi.org/10.3390/biology9090267
Barbosa A, Fernandes FAO, Alves de Sousa RJ, Ptak M, Wilhelm J. Computational Modeling of Skull Bone Structures and Simulation of Skull Fractures Using the YEAHM Head Model. Biology. 2020; 9(9):267. https://doi.org/10.3390/biology9090267
Chicago/Turabian StyleBarbosa, Alcino, Fábio A. O. Fernandes, Ricardo J. Alves de Sousa, Mariusz Ptak, and Johannes Wilhelm. 2020. "Computational Modeling of Skull Bone Structures and Simulation of Skull Fractures Using the YEAHM Head Model" Biology 9, no. 9: 267. https://doi.org/10.3390/biology9090267