Static stress distribution in tall cylindrical bins filled with pseudosolid grains

The controversy over the ratio of the intensities of the horizontal and vertical stresses in the grain mass and on the walls of storage bins has continued for some time. This ratio is commonly referred to as the K ratio. Four different experimental methods were used to determine K in a model cylindrical bin. At rest, measurements inside the mass of soybean grains revealed a decrease in the K ratio as the depth of material (or overburden pressure) increased along the axis of the bin. At large depths, the K ratio approached a constant value that may be approximated by K$\sb0$ = 1 $-$ sin$\rho$, where $\rho$ is the angle of friction of grain to grain. Direct wall measurements from electrical strain gages and from load cells fitted flush with the wall gave identical results of K ratio at large depths of material. Determination of K ratio from measurements of load carried by a separately supported floor revealed an averaging of K ratios over the depth of stored material. Thus the floor load method gave the highest value of K ratio at large depths of grain.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Agricultural Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Atewologun, Adenuga Olatunde

Contributors dc:contributor

• Riskowski, Gerald L.

• Engineering, Agricultural
• Engineering, Civil

Statement dc:rights

• Copyright 1990 Atewologun, Adenuga Olatunde

Language dc:language

eng

Identifier

AAI9026127
(UMI)AAI9026127

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/20632