ALL libraries (COBIB.SI union bibliographic/catalogue database)
13.
Evaluation of particle size distribution influence on flowability of granular materials using a digital image correlation method : doctoral thesis
Venkatesh, Ragunanth
With the aim to characterize the flowability of granular materials under uniaxial compression force a GFA index can be used. The GFA index is calculated based on the integration of the internal ...pressure distribution along the cylinder wall caused by uniaxial compressed granular material contained in the cylinder. In this thesis an optical granular friction analyzer (OGFA) is presented, where a digital image correlation (DIC) method is utilized to assess the cylinder strains used to calculate the internal pressure distribution. For the purpose of demonstration and validation of the developed O-GFA apparatus, three SS316L granular material samples with different particle mean sizes were tested and the results confirm that the particle mean size regulates the internal friction of granular materials. Further, the study of the influence of particle size distribution (PSD) width on GFA index and its related flowability showed that as PSD width increases, the GFA index increases, internal friction decreases and the internal pressure ratio remains constant. It has also been shown that the value of GFA index is load independent. Based on the experiments performed and presented results the main advantage of using the DIC method based O-GFA is that the piston–powder contact point and the region of the integration avoiding the region under the edge effects can be defined. Additionally, a 2% improvement of the GFA index’s accuracy has been achieved and showed by parametric analysis that the most of the observed total error (7.5%) arises from the DIC method-based measurements of the strains along the piston. Its robustness with respect to the number of points considered in evaluation of strains and related internal pressure has been demonstrated. It can also be concluded that, determining the GFA index using the O-GFA for characterizing the flowability of uniaxially compressed granular material is an alternative to traditional methods, which require the individual properties of granular materials i.e. internal friction and internal pressure ratio to be determined through two separate tests.
Type of material - dissertation
; adult, serious
Publication and manufacture - Ljubljana : [R. Venkatesh], 2021
It was not necessary to add the material to the shelf.
Bibliographic material was successfully added on shelf.
Adding bibliographical material on shelf was not successful.
Material is already on the shelf.
Permalink
URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year
Impact factor
Edition
Category
Classification
JCR
SNIP
JCR
SNIP
JCR
SNIP
JCR
SNIP
Select the library membership card:
DRS,
in which the journal is indexed
Database name
Field
Year
Links to authors' personal bibliographies
Links to information on researchers in the SICRIS system
Subject headings in COBISS General List of Subject Headings
Select pickup location
The material from the parent unit is free. If the material is delivered to the pickup location from another unit, the library may charge you for this service.
