Analysis of Head Impact

A finite difference form of the governing equations of motion for one and two-dimensional wave propagation is utilized to solve the problem of non- penetrating impact to the human head. The layered plate one-dimensional analysis provides a method of predicting the influence of several material prope...

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Main Author: Gordon, Stephen L
Format: Report
Language:English
Subjects:
BIODYNAMICS
BIOMECHANICS
BRAIN
CRASH INJURIES
ELASTIC PROPERTIES
HEAD(ANATOMY)
IMPACT
Stress Physiology
TENSILE PROPERTIES
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creator Gordon, Stephen L
description A finite difference form of the governing equations of motion for one and two-dimensional wave propagation is utilized to solve the problem of non- penetrating impact to the human head. The layered plate one-dimensional analysis provides a method of predicting the influence of several material property and size modifications in a geometrically simplified head impact model. The spherical model with a layered energy absorbing skull yields highly attenuated and smoothed tensile pressure peaks in the brain as compared to the results with a single layered elastic skull. An elastic brain model (that includes an assumed high dynamic shear modulus) suggests that the combined shear-normal stress levels would be more likely to cause failure than the shear free stress condition in a hydrodynamic brain model. The generality of the solution techniques would readily permit extension of the analyses to investigate the significance of future modelling considerations.
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The layered plate one-dimensional analysis provides a method of predicting the influence of several material property and size modifications in a geometrically simplified head impact model. The spherical model with a layered energy absorbing skull yields highly attenuated and smoothed tensile pressure peaks in the brain as compared to the results with a single layered elastic skull. An elastic brain model (that includes an assumed high dynamic shear modulus) suggests that the combined shear-normal stress levels would be more likely to cause failure than the shear free stress condition in a hydrodynamic brain model. The generality of the solution techniques would readily permit extension of the analyses to investigate the significance of future modelling considerations.</description><language>eng</language><subject>BIODYNAMICS ; BIOMECHANICS ; BRAIN ; CRASH INJURIES ; ELASTIC PROPERTIES ; HEAD(ANATOMY) ; IMPACT ; Stress Physiology ; TENSILE PROPERTIES</subject><creationdate>1973</creationdate><rights>APPROVED FOR PUBLIC RELEASE</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,777,882,27548,27549</link.rule.ids><linktorsrc>$$Uhttps://apps.dtic.mil/sti/citations/AD0767319$$EView_record_in_DTIC$$FView_record_in_$$GDTIC$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Gordon, Stephen L</creatorcontrib><creatorcontrib>NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA CREW SYSTEMS DEPT</creatorcontrib><title>Analysis of Head Impact</title><description>A finite difference form of the governing equations of motion for one and two-dimensional wave propagation is utilized to solve the problem of non- penetrating impact to the human head. The layered plate one-dimensional analysis provides a method of predicting the influence of several material property and size modifications in a geometrically simplified head impact model. The spherical model with a layered energy absorbing skull yields highly attenuated and smoothed tensile pressure peaks in the brain as compared to the results with a single layered elastic skull. An elastic brain model (that includes an assumed high dynamic shear modulus) suggests that the combined shear-normal stress levels would be more likely to cause failure than the shear free stress condition in a hydrodynamic brain model. The generality of the solution techniques would readily permit extension of the analyses to investigate the significance of future modelling considerations.</description><subject>BIODYNAMICS</subject><subject>BIOMECHANICS</subject><subject>BRAIN</subject><subject>CRASH INJURIES</subject><subject>ELASTIC PROPERTIES</subject><subject>HEAD(ANATOMY)</subject><subject>IMPACT</subject><subject>Stress Physiology</subject><subject>TENSILE PROPERTIES</subject><fulltext>true</fulltext><rsrctype>report</rsrctype><creationdate>1973</creationdate><recordtype>report</recordtype><sourceid>1RU</sourceid><recordid>eNrjZBB3zEvMqSzOLFbIT1PwSE1MUfDMLUhMLuFhYE1LzClO5YXS3Awybq4hzh66KSWZyfHFJZl5qSXxji4G5mbmxoaWxgSkAUX9HmM</recordid><startdate>19730401</startdate><enddate>19730401</enddate><creator>Gordon, Stephen L</creator><scope>1RU</scope><scope>BHM</scope></search><sort><creationdate>19730401</creationdate><title>Analysis of Head Impact</title><author>Gordon, Stephen L</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-dtic_stinet_AD07673193</frbrgroupid><rsrctype>reports</rsrctype><prefilter>reports</prefilter><language>eng</language><creationdate>1973</creationdate><topic>BIODYNAMICS</topic><topic>BIOMECHANICS</topic><topic>BRAIN</topic><topic>CRASH INJURIES</topic><topic>ELASTIC PROPERTIES</topic><topic>HEAD(ANATOMY)</topic><topic>IMPACT</topic><topic>Stress Physiology</topic><topic>TENSILE PROPERTIES</topic><toplevel>online_resources</toplevel><creatorcontrib>Gordon, Stephen L</creatorcontrib><creatorcontrib>NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA CREW SYSTEMS DEPT</creatorcontrib><collection>DTIC Technical Reports</collection><collection>DTIC STINET</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Gordon, Stephen L</au><aucorp>NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA CREW SYSTEMS DEPT</aucorp><format>book</format><genre>unknown</genre><ristype>RPRT</ristype><btitle>Analysis of Head Impact</btitle><date>1973-04-01</date><risdate>1973</risdate><abstract>A finite difference form of the governing equations of motion for one and two-dimensional wave propagation is utilized to solve the problem of non- penetrating impact to the human head. The layered plate one-dimensional analysis provides a method of predicting the influence of several material property and size modifications in a geometrically simplified head impact model. The spherical model with a layered energy absorbing skull yields highly attenuated and smoothed tensile pressure peaks in the brain as compared to the results with a single layered elastic skull. An elastic brain model (that includes an assumed high dynamic shear modulus) suggests that the combined shear-normal stress levels would be more likely to cause failure than the shear free stress condition in a hydrodynamic brain model. The generality of the solution techniques would readily permit extension of the analyses to investigate the significance of future modelling considerations.</abstract><oa>free_for_read</oa></addata></record>
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source DTIC Technical Reports
subjects BIODYNAMICS
BIOMECHANICS
BRAIN
CRASH INJURIES
ELASTIC PROPERTIES
HEAD(ANATOMY)
IMPACT
Stress Physiology
TENSILE PROPERTIES
title Analysis of Head Impact
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