ISSN 2326-7275
International Journal of Anatomy and Physiology ISSN 2326-7275 Vol. 14 (3), pp. 001-009, March, 2025. Available online at www.internationalscholarsjournals.org © International Scholars Journals
Full Length Research Paper
Biomechanical Response of the Skull-Dura System to Intracranial Pressure Variations: A Viscoelastic Finite Element Study
Xianfang Yue*, Li Wang, Shufeng Sun, Lige Tong
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Accepted 18 January, 2025
In the work, the dynamic characteristics of the human skull-dura mater system were studied. For the purpose of our analysis, we adopted a model consisted of a hollow sphere. By using the ‘Patran and Ansys’ finite element processor, a simplified three-dimensional finite element model (FEM) of a human skull was constructed. The model was used to calculate the deformation of human skull with the intracranial pressure changing. This required good representation of the complex anatomy of the skull. Four different entities are distinguished: Tabula externa, Tabula interna, and a porous Diploe sandwiched in between, and dura mater. A thin-walled skull was simulated by composite shell elements. The viscoelasticity of human skull-dura mater system was studied and analyzed by the finite-element Maxwell model. The 1/8 model consisted of 25224 nodes and 24150 three-dimensional 8-node isoparametric solid elements. The elastic-viscous mechanical characteristics must be used for the skull. The viscous strains account for about 40% of total strains of human skull and dura mater. And the range of strain errors is from 6.45 to 14.82% after ignoring the viscosity of skull and dura mater.
Key words: Viscoelasticity, finite-element analysis (FEA), strain, human skull, dura mater, intracranial pressure.