Pressure distribution in an assembly of wooden cylinders with various aspect ratios under uniaxial confined compression
PBN-AR
Instytucja
Instytut Agrofizyki im. Bohdana Dobrzańskiego Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
GRANULAR MATTER
ISSN
1434-5021
EISSN
1434-7636
Wydawca
SPRINGER
DOI
URL
Rok publikacji
2016
Numer zeszytu
2
Strony od-do
1-8
Numer tomu
18
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
Granular packings
Uniaxial confined compression
Packing of rods
Load distribution
Anisotropy
Open access
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Inne
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Licencja otwartego dostępu
Inna
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Streszczenia
Język
en
Treść
Understanding how forces propagate in granular assemblages is important for equipment design and process control in many technologies. Yet, it remains poorly understood. In this study, a cuboidal assembly comprising cylinders of various lengths (aspect ratios AR ranging from 0.9 to 3.6) were subjected to uniaxial confined compression tests. Samples were vertically compressed until the top platen exerted a pressure of 50 kPa on the uppermost particles. This maximum pressure corresponds to the hydrostatic pressure of an approximately 15 m high column of chopped wood that may be encountered in real storage structures. The nonlinear loading curves were obtained depended on the aspect ratios of the cylinders. The modulus of elasticity, calculated from the linear elastic part of the stress–strain curve, monotonically decreased from 10.2 to 8.6 MPa as the aspect ratio increased from 1.2 to 3.6. The elastic modulus and volume fraction exhibited similar trends as functions of the aspect ratio. The horizontal-to-vertical pressure ratio was calculated as the horizontal pressure exerted on the wider walls to the vertical pressure exerted on the top lid during loading–unloading cycles. For ARs up to 3.6, the pressure ratio was approximately 0.31; for the longest cylinders (AR = 3.6), it decreased to approximately 0.27, probably because the assumption of the representative chamber volume was invalidated at this AR.
Cechy publikacji
ORIGINAL_ARTICLE
Inne
System-identifier
726934
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