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SOLE OF A SOLDIER
Rockdale Magnet School For Science and TechnologyThursday, April 20, 2023
INTRODUCTION
• Personal Interest in Military• Combat boots are issued to every solider
– Sole design is based on the terrain and intended use of the boot
GOAL
• Design a mixed-use combat boot for the 21st century soldier who encounters deserts, mountains, and jungles
• Develop a new sole design that would out perform (have better all around traction) than currently used designs
BACKGROUND
• Ripple, Sahara, Panama, Lug, Vibram®Sierra, and Basic (ALTAMA®, 2008)
• Factors of Traction: – surface’s material properties – the macroscopic and microscopic shape or
"roughness“– force of contact– area of contact – contaminants at the materials boundary including
lubricants and adhesives– (Bowden and Tabor, 1986)
MATERIALS
Sierra Design Panama Design
MOLD DESIGN
SAHARA BOOT DESIGN
PANAMA BOOT DESIGN
PROTOTYPE BOOT DESIGN
Facing Up
TABLESBEFORE CLEANING
AVERAGE (cm) 52.12 57.78 57.48
ANGLE 31.41° 35.3° 35.09°
COEFFICIENT OF FRICTION 0.6106 0.708 0.7026
AVERAGE (cm) 54.64 53.48 59.12
ANGLE 33.12° 32.33° 36.24°
COEFFICIENT OF FRICTION 0.6524 0.6329 0.733
Facing DownFacing Down
Sahara Panama Proto Sahara Panama Proto
TABLES
AVERAGE (cm) 54.14 56.2 59.26
ANGLE 32.78° 34.19° 36.34°
COEFFICIENT OF FRICTION 0.644 0.6793 0.7356
AFTER CLEANING
AVERAGE (cm) 54.4 56.16 56.62
ANGLE 32.96° 34.31° 34.48°
COEFFICIENT OF FRICTION 0.6484 0.6824 0.6868
Facing Up Facing Down
Sahara Panama Proto Sahara Panama Proto
BEFORE
BEFORE
AFTER
AFTER
CONCLUSION
• Overall Goal: redesign a military combat boot sole that has significant all around traction for the 21st century soldier
• Prototype design outperformed the two control combat boots
ASSUMPTIONS AND SOURCES OF ERROR
• Test simulates real world applications• One of the boots reacted with the rubber
compound• Lubrication on a few of the boots while testing
FUTURE RESEARCH
• Test different sole designs – Make smaller incremental changes
• Test different sole materials – Mixture of common vulcanized rubbers?
• Work with the military to overcome government boundaries and access issues
Acknowledgements
• Ken Shinmura– Assisted with Inventor Software
• Research Teacher– Mrs. Amanda Baskett
• Rockdale Magnet School – Funding
REFERENCES
1936 The intuition. Retrieved December 15, 2008, from Vibram Web site:
http://www.vibram.com/index.php/us/VIBRAM/About-Us/The-History
ALTAMA, Mil-Spec. Retrieved May 17, 2008, from Altama Military Footwear Web site:
http://www.altama.com/Tp1/search_bycategoryInner.aspx?code=Mil-Spec
Blau, P.J. (1996). Friction Science and Technology. New York. Dekker
Bowden, F.P.; Tabor, D (1973). Friction: An introduction to Tribology. New York Anchor Press/Doubleday
Bowden, F.P.; Tabor, D (1986). The Friction and Lubrication of Solids. Oxford, England: Oxford University Press
Countermeasure, (2006, February). Fatal Falls. CM Countermeasure, 27, 16-17.
Kaufma, K. (2000). Military training-related injuries surveillance, research, and prevention. American Journal of
Preventative Medicine, v181, 1, 54-63
Researchers use cutting edge technology to help develop new Marine combat boot. (1998, March). Navy
Medicine, 89(2), 28. Retrieved August 21, 2008, from AP Science database. (Document ID: 37936451).
Ruina, A (1983). Slip instability & State Variable Friction Laws. Journal of Geophysical Research. 88, 10359-10376
Questions?
SOLE OF A SOLDIER