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Brain pressure wave propagation during baseball impact

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conference contribution
posted on 19.06.2020, 13:07 by Yusuke Miyazaki, Jonathan FarmerJonathan Farmer, Miki Morimatsu, Shota Ito, Sean MitchellSean Mitchell, Paul SherrattPaul Sherratt
The purpose of this study was to examine a mechanism of brain injuries during baseball impact. A baseball helmet was attached to a novel surrogate head, which simulated the intracranial structure of a human head, and baseball impact tests were carried out using a high-speed cannon system. In addition, the baseball impacts were simulated using a corresponding finite element model of the head and helmet. From the results of both the experimental and simulated impacts, the peak acceleration of the brain was greater than that of the skull, which was due to the propagation of pressure waves, in turn reflected in the intracranial space. The peak negative pressure reached the cavitation threshold on a broad area of the brain surface, repeatedly. This phenomenon was different from the brain deformation in other impact conditions such as football and traffic accident cases. Therefore, a new design philosophy for a helmet which reduces the effects of pressure wave propagation may be required to mitigate brain injuries.

Funding

JSPS KAKENHI, grant number KK160123.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Proceedings 2020

Volume

49

Issue

1

Source

13th Conference of the International Sports Engineering Association

Publisher

MDPI

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Publication date

2020-06-15

Copyright date

2020

Notes

The 13th conference on the Engineering of Sport on behalf of the International Sports Engineering Association (ISEA) took place online due to COVID-19.

eISSN

2504-3900

Language

en

Location

Tokyo, Japan [Online]

Event dates

22nd June 2020 - 26th June 2020

Depositor

Mr Jon Farmer. Deposit date: 18 June 2020

Article number

149