Loading...

3D Finite Element Modeling of Head for Studying Subdural Hemorrhage Induced by Impact

Sahandifar, Pooya | 2016

2505 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48274 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Naghdabadi, Reza; Sohrabpour, Saeed
  7. Abstract:
  8. Subdural hemorrhage (SDH) is one of the most common traumatic brain injuries. The mortality rate of SDH is over 30 percent. In addition, patients require to visit hospital for treatment and further healthcare. According to the costs of treatment and frequency of injuries, prevention of SDH is essential. 3D-Finite element modeling of human head is an appropriate tool for evaluation of injury risk and setting up a prevention tolerance criteria. The aim of this study is to create a 3D finite element model of human head with special consideration of vessels. Vessels are modeled by truss elements at current finite element models of human head; however, geometry of vessels is regarded as simple shapes. In the current study, using medical images, 3D patient-specific human head model is developed. Consequently, brain and vessels are asymmetric. In addition to asymmetric vessel model, a symmetric beam element model of vessels is developed to study effects of asymmetry. Isotropic and anisotropic mechanical properties are assigned to the vessels in order to study their effects on maximum stress of the vessels. Results of simulations reveal that anisotropic mechanical properties reduces the maximum stress on the vessels. In addition, asymmetry of the model and direction of impact can change location and value of the maximum vonMises stress. Consequently, Occipital impacts are more injurious than Frontal impacts in the identical impacts. It is also implied that current tolerance criteria such as HIC and HIP are not sensitive to the direction of impact and geometric asymmetry. Moreover, these criteria overestimate vessels stresses
  9. Keywords:
  10. Head Injury Criterion (HIC) ; Traumatic Brain Injury (TBI) ; Finite Element Model ; Biomechanical Models ; Subdural Hemorrhage (SDH) ; Patient-Specific Modeling

 Digital Object List

 Bookmark

...see more