Ground pressure is the pressure exerted on the ground by the tires or tracks of a motorized vehicle, and is one measure of its potential mobility,[1] especially over soft ground. It also applies to the feet of a walking person or machine. Pressure is measured in the SI unit of pascals (Pa). Average ground pressure can be calculated using the standard formula for average pressure: P = F/A.[2] In an idealised case, i.e. a static, uniform net force normal to level ground, this is simply the object's weight divided by contact area. The ground pressure of motorized vehicles is often compared with the ground pressure of a human foot, which can be 60 – 80 kPa while walking or as much as 13 MPa for a person in spike heels.[3]
Increasing the size of the contact area on the ground (the footprint) in relation to the weight decreases the unit ground pressure. Ground pressure of 14 kPa (2 psi) or less is recommended for fragile ecosystems like marshes.[4] Decreasing the ground pressure increases the flotation, allowing easier passage of the body over soft terrain. This is exemplified by use of equipment such as snowshoes.
Note: The pressures for adult human male and horse are for standing still position. A walking human will exert more than double his standing pressure. A galloping horse will exert up to 3.5 MPa (500 psi). The ground pressure for a pneumatic tire is roughly equal to its inflation pressure.
^Allen, Jim. Jeep 4 X 4 Performance Handbook. MotorBooks/MBI Publishing Company. p. 16. SBN 076030470X.
^Wenger, Karl F. (1984). Forestry Handbook. New York : Wiley. p. 499. ISBN0-471-06227-8.
^J. William Thompson, Kim Sorvig (2000). Sustainable Landscape Construction: A Guide to Green Building Outdoors. Island Press. p. 51. ISBN1-55963-646-7.{{cite book}}: CS1 maint: uses authors parameter (link)
^"Page 4 of Management of small dock and piers, best management practices, May 2005 NOAA" (PDF).
ground, pressure, pressure, exerted, ground, tires, tracks, motorized, vehicle, measure, potential, mobility, especially, over, soft, ground, also, applies, feet, walking, person, machine, pressure, measured, unit, pascals, average, ground, pressure, calculate. Ground pressure is the pressure exerted on the ground by the tires or tracks of a motorized vehicle and is one measure of its potential mobility 1 especially over soft ground It also applies to the feet of a walking person or machine Pressure is measured in the SI unit of pascals Pa Average ground pressure can be calculated using the standard formula for average pressure P F A 2 In an idealised case i e a static uniform net force normal to level ground this is simply the object s weight divided by contact area The ground pressure of motorized vehicles is often compared with the ground pressure of a human foot which can be 60 80 kPa while walking or as much as 13 MPa for a person in spike heels 3 Increasing the size of the contact area on the ground the footprint in relation to the weight decreases the unit ground pressure Ground pressure of 14 kPa 2 psi or less is recommended for fragile ecosystems like marshes 4 Decreasing the ground pressure increases the flotation allowing easier passage of the body over soft terrain This is exemplified by use of equipment such as snowshoes Contents 1 Examples 2 See also 3 Related reading 4 ReferencesExamples EditThis section needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed July 2020 Learn how and when to remove this template message All examples are approximate and will vary based on conditions Object Ground pressure kPa psi Hovercraft 0 7 0 1Human on snowshoes 3 5 0 5Rubber tracked ATV 5 165 0 75Wheeled ATV 13 8 2Diedrich D 50 T2 drilling rig 26 2 3 8Human male 55 8M1 Abrams tank 5 103 151993 Toyota 4Runner Hilux Surf 170 25Adult horse 550 kg 1250 lb 170 25Bagger 288 excavation machine 170 25Passenger car 205 30Adult elephant 240 35Mountain bicycle 245 40Road racing bicycle 620 90Stiletto heel 3 250 471Note The pressures for adult human male and horse are for standing still position A walking human will exert more than double his standing pressure A galloping horse will exert up to 3 5 MPa 500 psi The ground pressure for a pneumatic tire is roughly equal to its inflation pressure See also EditContact patch Tire load sensitivityRelated reading EditTheory of Ground Vehicles 6 References Edit Allen Jim Jeep 4 X 4 Performance Handbook MotorBooks MBI Publishing Company p 16 SBN 076030470X Wenger Karl F 1984 Forestry Handbook New York Wiley p 499 ISBN 0 471 06227 8 J William Thompson Kim Sorvig 2000 Sustainable Landscape Construction A Guide to Green Building Outdoors Island Press p 51 ISBN 1 55963 646 7 a href Template Cite book html title Template Cite book cite book a CS1 maint uses authors parameter link Page 4 of Management of small dock and piers best management practices May 2005 NOAA PDF mathscinotes 2016 06 10 Tank Track Ground Pressure Examples Math Encounters Blog Retrieved 2020 07 16 Wong Jo Yung 2001 Theory of Ground Vehicles New York John Wiley ISBN 0 471 35461 9 This physics related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Ground pressure amp oldid 1134783163, wikipedia, wiki, book, books, library,
