An Analytical Model For Investigation Of Human Head Impact And Study Of Its Governing Equations

Mansourbaghaei, Shahab; Haghayegh, Majid; Rajaei, Seyed Mohammad

doi:10.22041/ijbme.2009.13385

An Analytical Model For Investigation Of Human Head Impact And Study Of Its Governing Equations

Document Type : Full Research Paper

Authors

Shahab Mansourbaghaei ¹

Majid Haghayegh ²

Seyed Mohammad Rajaei ³

¹ PhD Candidate, Mechanical Engineering School, Iran University of Science and Technology

² M.Sc Graduated, Mechanical Engineering School, Iran University of Science and Technology

³ Assistant Professor, Mechanical Engineering School, Iran University of Science and Technology

https://doi.org/10.22041/ijbme.2009.13385

Abstract

An analytical method to predict the response of the inclined impact of a fluid filled elastic spherical shell having an arbitrary thickness with an elastic toroid is investigated in this paper which can be a model for analytical evaluation of blunt impact on the human head. The study is performed under a combination of Hertzian contact theory and the local effect of membrane and bending of the shell in order to state the implicit equation to determine the transmitted force. With respect to the analytical responses, it is concluded that transmitted force decreases and contact duration increases by increasing of attack angle in constant initial velocity. In addition, closed form solution is presented to obtain impact parameters including the duration, the maximum transferred load and the maximum acceleration of the shell which particularly important for the researchers. Therefore investigation of the important quantities of the impact problem with closed form solution is possible. On the other hand, limiting cases will be discussed in next step and the concluded results are validated by finite element methods to verify the response of the model. In this step, a good agreement between analytical responses and numerical results is observed that reveals the correctness of analytical equations. In the final step of this research, obtained results are compared with experimental data.

Keywords

Fluid Filled Spherical Shell

Elastic Toroidal Object

Impact

Hertz Theory

Membrane And Bending Effect

Subjects

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