University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Slow relaxation behavior of cohesive powders

Imole, OI, Paulick, M, Morgeneyer, M, Magnanimo, V, Montes, BEC, Ramaioli, M, Kwade, A and Luding, S (2014) Slow relaxation behavior of cohesive powders arXiv.

[img]
Preview
Text
1410.2151v1.pdf - Author's Original
Available under License : See the attached licence file.

Download (1MB) | Preview
[img]
Preview
PDF (licence)
SRI_deposit_agreement.pdf
Available under License : See the attached licence file.

Download (33kB) | Preview

Abstract

We present findings from uniaxial (oedometric) compression tests on two cohesive industrially relevant granular materials (cocoa and limestone powder). Experimental results are presented for the compressibility, tested with two devices -- the FT4 Powder Rheometer and the custom made lambdameter. We focus on the stress response and the slow relaxation behavior of the cohesive samples tested. After compression ends, at constant volume, the ongoing stress relaxation is found to follow a power law consistently for both cohesive powders and for the different testing equipments. A simple (incremental algebraic evolution) model is proposed for the stress relaxation in cohesive powders, which includes a response timescale along with a second, dimensionless relaxation parameter. The reported observations are useful for both the improvement of discrete element simulations and constitutive macroscopic models for cohesive granular materials.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
AuthorsEmailORCID
Imole, OIUNSPECIFIEDUNSPECIFIED
Paulick, MUNSPECIFIEDUNSPECIFIED
Morgeneyer, MUNSPECIFIEDUNSPECIFIED
Magnanimo, VUNSPECIFIEDUNSPECIFIED
Montes, BECUNSPECIFIEDUNSPECIFIED
Ramaioli, MUNSPECIFIEDUNSPECIFIED
Kwade, AUNSPECIFIEDUNSPECIFIED
Luding, SUNSPECIFIEDUNSPECIFIED
Date : 8 October 2014
Copyright Disclaimer : This is the arXiv version of the paper. arXiv:1410.2151 [cond-mat.soft]
Uncontrolled Keywords : cond-mat.soft, cond-mat.soft, cond-mat.stat-mech
Related URLs :
Additional Information : This is the arXiv version of the paper. arXiv:1410.2151 [cond-mat.soft]
Depositing User : Symplectic Elements
Date Deposited : 01 Mar 2016 15:27
Last Modified : 01 Mar 2016 15:27
URI: http://epubs.surrey.ac.uk/id/eprint/809929

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800