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Biomechanical Modeling of Human Eye in Car Airbag Blunt Impacts During Accident: an Empirical Test and Finite Element Study

Shirzadi, Hooman | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49843 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Zohour, Hassan
  7. Abstract:
  8. Eye and vision are the most important tools and the perceptual sense of human. This important vital member is one of the most vulnerable organs of human body. For example in the United States 1.9 million eye surgery are being done yearly which include 9 thousand globe rupture and 30 thousand blindness due to impacts on the eye. Eye traumas could have occurred as mechanical, radiation, thermal, chemical, etc. among these, the damages related to the airbag impact which is subset of mechanical damages, take a significant percentage. Presenting a model of human eye in car airbag blunt impacts during accident could be effective for receiving helpful information from damage of the internal parts of eye components in order to diagnosis the damages and doing a treatment. In present study at first the geometric of the eye components have been designed with CT-Scan images via Mimics and SolidWorks software, then the most appropriate eye component’s mechanical properties have been extracted among literatures. Because of the importance of retina and sclera tissues in impacts and also their mechanical properties imperfections that exploited at literatures, with experimental testing a new perfect mechanical properties of these tissues have been achieved. In the next level, automobile’s airbag with material and mechanical properties which were almost near to the reality have been designed at inflated stage (maximum inner pressure). In conclusion, eye behavior which has been influenced by automobile’s airbag impact is analyzed and evaluated with finite element ABAQUS software. Results of the model show that at the impact velocity of 67 m/s, the stress equal to 9.34 MPa have been created in sclera tissue which(that) according to Criterion damage in literatures (9.4 MPa), this tissue will be ruptured
  9. Keywords:
  10. Finite Element Analysis ; Eyes ; Biomechanical Modeling ; Traffic Accidents ; Blunt Impacts ; Car Airbag ; Eye Injuries

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