Triaxial testing of dry, cohesive powder and its application to a modified Cam-clay constitutive model

Tripodi, M. A.; Puri, Virendra M.; Manbeck, H. B.; Messing, Gary L.

doi:10.1016/0032-5910(94)02843-5

Cited by 18 publications

(7 citation statements)

References 12 publications

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“…The conventional triaxial compression apparatus was used to obtain the compressibility and frictional coefficients, strength parameters, and constitutive model of the agricultural materials (Thompson et al, 1983;Zhang et al, 1986;Tripodi et al, 1994;Turner et al, 2016). Other given parameters, such as the internal friction angle, elastic parameters and dilatancy angle, were also obtained from the common triaxial apparatus or customized triaxial apparatus (Britton and Moysey, 1986;Hardin et al, 1990;Moya et al, 2013;Zeng et al, 2019b).…”

Section: Introductionmentioning

confidence: 99%

Stress-strain response of sheared wheat granular stored in silos using triaxial compression tests

Zeng¹,

He²,

Wang³

2020

Int. Agrophys.

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A b s t r a c t. Wheat granular material stored in silos usually suffers shearing loads, which induces complex stress-strain response during the silo filling and discharging process. In order to guarantee the safe storage of these granular materials, it is necessary to investigate the shearing behaviour of wheat granular material in silos. In this paper, a series of triaxial tests were conducted on wheat granular material by using a modified double cell triaxial system. The stress-strain responses including the volumetric strain behaviour were examined considering the effect of the initial void ratio, confining pressure and shearing velocity. Different shearing states were discussed to obtain their strength parameters in various conditions. The results show that the shearing characteristics of wheat granular material are influenced by the shearing velocity. The friction angles increase with the decreasing void ratio at different states. The final volumetric strain decreases with increasing confining pressure, and the dilation is diminished. The dilatancy behaviour was quantitatively evaluated based on Row's theory for wheat granular material. The stress-strain relationship of wheat granular material was then determined.K e y w o r d s: wheat granular, void ratio, confining pressure, shearing velocity, strength, dilatancy

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Section: Introductionmentioning

confidence: 99%

Stress-strain response of sheared wheat granular stored in silos using triaxial compression tests

Zeng¹,

He²,

Wang³

2020

Int. Agrophys.

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“…increase in stiffness, nor does it allow any dependence of its parameters on stress. As shown in Table 4, all parameters are fixed values determined from specified triaxial tests [53] and do not vary with applied stress levels. Compaction loading, unlike triaxial loading, stiffened the wheat flour during strain, and the simple definition of some parameters, particularly the elastic parameters, were insufficient at high stress levels.…”

Section: Compaction Test Resultsmentioning

confidence: 99%

“…By definition, Cam clay parameters do not vary with applied stress, and the pressure levels used to determine the parameters were considered adequate. It was shown in the data used to determine material parameters [53] that parameter values changed at different pressure levels, but mean values were chosen to predict load curves, with good results.…”

Section: Compaction Test Resultsmentioning

confidence: 99%

Constitutive Model for Dry Cohesive Powders with Application to Powder Compaction

Puri

Tripodi

Manbeck

et al. 1995

KONA

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“…The MCC model is a basic constitutive model (Suebsuk et al, 2010;Tripodi et al, 1994), which provides adequate results for predicting material behavior in conventional triaxial tests as well as in consolidation analysis. The yield surface of MCC model is the equivalent surface of plastic volume strain.…”

Section: Methodsmentioning

confidence: 99%

“…The logarithmic hardening modulus λ and the isotropic swelling index κ were determined by the isotropic consolidation tests (Tripodi et al, 1994). Parameter λ and κ were .…”

Section: Methodsmentioning

confidence: 99%

Simulation of static stress distribution of wheat piles in silos by the modified Cam-clay model

Gao

Cheng

Hu³

et al. 2019

Int. Agrophys.

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A b s t r a c t. Static stress of granular materials stored in silos is important for the security of materials during storage. Janssen equation was commonly used to calculate the static stress of grains in silos, but later researchers found the equation underestimated loads in storage bins. In this paper, the modified Cam-clay model was applied to study the stress distribution of wheat piles at four moisture levels, stored in a circular flat bottom silo, at different grain depth and radius of silos. The results showed that as the grains depth increased, the vertical stress of wheat piles increased except the wall-bottom of silos, and the lateral stress increased except the center of silos near bin bottom. Moreover, it was found that as the radius increased, the vertical stress of wheat piles decreased at the same depth and moisture content, and the lateral stress decreased but increased near the bin bottom in the same case. When the mean stress of a layer of grains were observed, it was found that the lateral stress was negatively correlated with moisture content when the vertical stress had no concern with it at the same grain depth and all of them approached the maximum at the same moisture content.K e y w o r d s: stress distribution, wheat pile, silo, modified Cam-clay model, finite element method

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Triaxial testing of dry, cohesive powder and its application to a modified Cam-clay constitutive model

Cited by 18 publications

References 12 publications

Stress-strain response of sheared wheat granular stored in silos using triaxial compression tests

Stress-strain response of sheared wheat granular stored in silos using triaxial compression tests

Constitutive Model for Dry Cohesive Powders with Application to Powder Compaction

Simulation of static stress distribution of wheat piles in silos by the modified Cam-clay model

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