A new interparticle friction apparatus for granular materials

被引：78

作者：

Cavarretta, I. ^{[1
]}

Rocchi, I. ^{[1
]}

Coop, M. R. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, London, England

来源：

CANADIAN GEOTECHNICAL JOURNAL | 2011年 / 48卷 / 12期

关键词：

friction; nonconforming contact; yield surface; calibration; stiffness;

D O I：

10.1139/T11-077

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

A new apparatus is described that measures interparticle friction between sand-sized grains over relatively large displacements and also under immersion in a fluid. Its relatively simple design allows the key calibrations to be checked by statics. An analysis of the geometry of simple spherical particle contacts and the forces at those contacts revealed that there are strict constraints on the permissible stiffness of the interparticle friction apparatus to avoid stick-slip behaviour. Tests on ball bearings gave highly repeatable data, while others on glass ballotini revealed a significant effect of ambient humidity on the data obtained. The interparticle friction was found to increase with the roughness of the ballotini. Immersion in water increased the interparticle friction slightly for both the ballotini and quartz sand particles, while immersion in oil reduced the friction considerably for the quartz sand, especially at higher contact force levels.

引用

页码：1829 / 1840

页数：12

共 16 条

[1]

[Anonymous], THESIS U CALIFORNIA

[2]

[Anonymous], 2009, THESIS IMPERIAL COLL

[3]

Barton R. R., 1972, THESIS VICTORIA U MA

[4]

BOWDEN FP, 1945, CHEM SOC ANN REPORTS, V42, P20

[5]

Bromwell LG., 1966, R6618 MIT DEP CIV EN

[6] The influence of particle characteristics on the behaviour of coarse grained soils [J].

Cavarretta, I. ;

Coop, M. ;

O'Sullivan, C. .

GEOTECHNIQUE, 2010, 60 (06) :413-423

[7]

Dickey J., 1966, THESIS MIT CAMBRIDGE

[8] Nonlinear distortion in atomic force microscopy (AFM) measurements [J].

Hahlweg, C. ;

Gruhlke, M. ;

Rothe, H. .

MEASUREMENT SCIENCE AND TECHNOLOGY, 2009, 20 (08)

[9]

Horn H.M., 1962, GEOTECHNIQUE, V12, P319, DOI DOI 10.1680/GEOT.1962.12.4.319

[10]

Johnson K. L., 1987, CONTACT MECH

← 1 2 →