Accession Number:

AD0416309

Title:

THE EFFECT OF VACUUM ON THE SHEARING RESISTANCE OF IDEAL GRANULAR SYSTEMS

Descriptive Note:

Corporate Author:

PRINCETON UNIV NJ

Personal Author(s):

Report Date:

1963-06-01

Pagination or Media Count:

152.0

Abstract:

Frictional behavior of ideal individua particle media was investigated in connection with lunar soil applications. Several conclusion seem justified 1 The shear strength of an ideal granular system is a function of the atmosphere. Specifically, it is concluded that very low air pressure causes a decrease in thick ness of the adsorbed surface films resulting in increased grain to grain friction and shearing resistance. 2 The relationship between inter particle friction and shearing resistance is subject to theoretical analysis that can be reason ably substantiated. 3 It is reasonable to expect that very high vacuum conditions will cause a significant increase in coefficient of friction of some, if not all, rock forming minerals. 4 Size, as such, has no effect on the shear strength of granular materials. 5 At a given absolute density, a uniform material has, in general, a greater shearing resistance than a well graded material.

Subject Categories:

  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE