TY - CONF
T1 - Determination of fundamental mechanical properties of biomass using the cubical triaxial tester to model biomass flow
AU - Yi, Hojae
AU - Puri, Virendra M.
AU - Lanning, Christopher J.
AU - Dooley, James H.
N1 - Funding Information:
This material is based upon work supported by the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Bioenergy Technologies Office, Integrated Biorefinery Optimization award number DE-EE0008254. This work was partially supported by USDA NIFA Agricultural Experiment Station project PEN-4601.
Publisher Copyright:
© 2020 EDP Sciences. All rights reserved.
PY - 2020
Y1 - 2020
N2 - The flowability of biomass is an indicator of the relative easiness with which biomass will flow and handle. Unfortunately, this term of flowability is not defined with first-principle based theories. The measurements of flowability are often conducted based on empirical or tertiary experiments. This status quo impedes advancing the design and operation of biomass handling systems by employing engineering principles. It is imperative to establish an experimental protocol that minimizes empirical aspects of flowability characterization to account for the variability of biomass properties. Cubical triaxial tester (CTT) is a true triaxial tester with a flexible pressure application membrane that is capable of determining fundamental mechanical properties of bulk biomass with minimal confounding effects of the test device. This study demonstrates the operational principles of the cubical triaxial tester and the procedure of triaxial tests. Parameters of Mohr-Coulomb, Modified Drucker-Prager, and Cam-Clay model parameters are determined for milled Corn stover and Douglas fir with two sets of triaxial tests, i.e., hydrostatic compression triaxial test and conventional compression triaxial test. The determination of bulk mechanical properties pertains to the flow characteristics of biomass can be performed unambiguously owing to the operational principle of CTT that is applying stresses in principal directions and measuring strains in corresponding principal directions. This paper will highlight the advantages of a CTT in the characterization of mechanical properties of bulk biomass, which is a steppingstone for engineering a reliable biomass handling.
AB - The flowability of biomass is an indicator of the relative easiness with which biomass will flow and handle. Unfortunately, this term of flowability is not defined with first-principle based theories. The measurements of flowability are often conducted based on empirical or tertiary experiments. This status quo impedes advancing the design and operation of biomass handling systems by employing engineering principles. It is imperative to establish an experimental protocol that minimizes empirical aspects of flowability characterization to account for the variability of biomass properties. Cubical triaxial tester (CTT) is a true triaxial tester with a flexible pressure application membrane that is capable of determining fundamental mechanical properties of bulk biomass with minimal confounding effects of the test device. This study demonstrates the operational principles of the cubical triaxial tester and the procedure of triaxial tests. Parameters of Mohr-Coulomb, Modified Drucker-Prager, and Cam-Clay model parameters are determined for milled Corn stover and Douglas fir with two sets of triaxial tests, i.e., hydrostatic compression triaxial test and conventional compression triaxial test. The determination of bulk mechanical properties pertains to the flow characteristics of biomass can be performed unambiguously owing to the operational principle of CTT that is applying stresses in principal directions and measuring strains in corresponding principal directions. This paper will highlight the advantages of a CTT in the characterization of mechanical properties of bulk biomass, which is a steppingstone for engineering a reliable biomass handling.
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U2 - 10.13031/aim.202000058
DO - 10.13031/aim.202000058
M3 - Paper
AN - SCOPUS:85102277720
SP - 2
EP - 10
T2 - 2020 ASABE Annual International Meeting
Y2 - 13 July 2020 through 15 July 2020
ER -