Accession Number:

AD0735792

Title:

On the Effect of Pore Pressures on Soil-Wheel Interaction.

Descriptive Note:

Research memo.,

Corporate Author:

GRUMMAN AEROSPACE CORP BETHPAGE N Y RESEARCH DEPT

Personal Author(s):

• Karafiath,Leslie L.

Report Date:

1971-12-01

Pagination or Media Count:

40.0

Abstract:

Wheel loads generate pore pressures in soils when their moisture content exceeds a certain level. These pore pressures affect the development of failure zones that control interface stresses in soft soils. The differential equations of plasticity governing the geometry of failure zones have been expanded to account for pore pressures and appropriate algorithms developed for the numerical solution of these equations. Slip-line field geometries and wheel performance parameters are shown in an example for various degrees of shear mobilization and sore pressure parameters. The effect of pore pressures on wheel performance is considerable even in soils with weak pore pressure response. Author

Descriptors:

• *WHEELS
• MOISTURE
• INTERACTIONS
• TRAFFICABILITY
• LOADS(FORCES)
• PLASTIC PROPERTIES

Subject Categories:

• Soil Mechanics
• Surface Transportation and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE