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Design and Fit of Body Armour
Mark Jaffrey PhDPhysical Ergonomics Group
Land Human Systems
Land Division
UNCLASSIFIED – Approved for Public Release
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Tiered Body Armour S&T InputUNCLASSIFIED – Approved for Public Release
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Tiered Body Armour S&T Input
PersonActive Protection
Dismounted Soldier Personal Survivability
Protection SystemPassive Protection
Body Armour Coverage
Ballistic Rating
Thermal Load
Physical Mobility
Trade-off: Active vs passive
protection
Sustainable work rate
Fit for Service Physical ergonomics, integration and use-ability
Anthropometry / Plate design
Physical Protection Group
Tier 1Tier 2 Tier 3
UNCLASSIFIED – Approved for Public Release
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Introduction
Qualitative coverage requirements exist (e.g. NIJ: "Stab Resistance of Personal Body Armor NIJ Standard‐0115.00 ", ed. Washington, DC, USA: U.S. Department of Justice,
2000.)
But no quantitative population data is available
Body armour coverage requirements are not well defined
Image adapted; original version courtesy of Merck Sharp & Dohme Corp
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23 male participants
Two MRI scanning modalities– Recumbent (Inspiration and Expiration)
– Upright
Methods: Participants & ImagingUNCLASSIFIED – Approved for Public Release
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Effects of breathing
Breath Out Breath In
24mm30mm
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http://en.wikipedia.org/wiki/Magnetic_resonance_imaging
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Effects of posture
160 mm196 mm
Lying Sitting
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Applications: Coverage analysis Essential structures in Upright Posture
Small plate: 8” x 10”
Large plate: 10” x 12”
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NIJ lists common dimensions of hard armour as:
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Applications: Probability Distributions (upright)
100%
91%
26%
13%
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Currently assessing the feasibility of:
1. A Large Scale Survey
2. A Different Approach (upright & deep breath in)
Conventional MRI? Upright MRI? Ultrasound?
Future Research: Organ Mapping
?
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Future Research: Plate Size Acceptability
Human Factors/Ergonomic Assessment with Users:
‐ Plate width, length, shape
‐ Freedom of movement
‐ Task performance
‐ User rating
Controlled study:
‐ Not using whatever version of TBAS is in service
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Concept Design & Prototyping:Body Armour Shape & Size
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