The effect of wall friction in the compaction of pharmaceutical tablets with curved faces: a validation study of the Drucker–Prager Cap model

Sinka, I.C.; Cunningham, J. C.; Zavaliangos, Antonios

doi:10.1016/s0032-5910(03)00094-9

Cited by 184 publications

(115 citation statements)

References 26 publications

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“…The process was described using both elastic and plastic models, ie DruckerPrager, Di Maggio-Sandler, and Cam-Clay. They are discussed in numerous works (Chen et al, 2001;Cocks, 2001;Michrafy et al, 2002;Rolland et al, 2012;Sinka et al, 2003;Wu et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Models of pressure compaction and their application for wheat meal

Skonecki¹,

Kulig²,

Łysiak³

2014

International Agrophysics

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A b s t r a c t. Processes of compaction of granular materials were described using selected models. The analysis of their accuracy on the example of wheat was the basis for the discussion on their applicability to the processing of plant-origin materials. Parameters of the model equations for wheat, compressed at 10-18% moisture content were calculated, and the relations between these parameters and wheat moisture were determined. It was found that the analyzed models described the pressure compaction of granular plant material with different accuracy, and were highly dependent on moisture. The study also indicated that the model of Ferrero et al. fits the experimental results well. The parameters of this model reflected very well the physical phenomena which occur during compression.K e y w o r d s: pressure compaction models, wheat meal, moisture

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Section: Introductionmentioning

confidence: 99%

Models of pressure compaction and their application for wheat meal

Skonecki¹,

Kulig²,

Łysiak³

2014

International Agrophysics

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“…Numerical simulations may be based on either continuous or discrete models or a combination of both. The finite element method (FEM) is adopted for simulations at the continuum level and is typically used to determine density and stress distributions within compacts of different shapes [4][5][6][7]. The FEM however requires indirect constitutive models for the powder behaviour that make predictions based on particle properties challenging.…”

Section: Introductionmentioning

confidence: 99%

An experimental evaluation of the accuracy to simulate granule bed compression using the discrete element method

Persson

Frenning

2012

Powder Technology

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PostprintThis is the accepted version of a paper published in Powder Technology. This paper has been peerreviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Persson, A., Frenning, G. (2012) An experimental evaluation of the accuracy to simulate granule bed compression using the discrete element method. AbstractIn this work, granule compression is studied both experimentally and numerically with the overall objective of investigating the ability of the discrete element method (DEM) to accurately simulate confined granule bed compression. In the experiments, granules of microcrystalline cellulose (MCC) in the size range 200-710 µm were used as model material. Unconfined uniaxial compression of single granules was performed to determine granule properties such as the yield pressure and elastic modulus and compression profiles of the MCC granules were obtained from granule bed compression experiments. By utilizing the truncated Hertzian contact model for elastic-perfectly plastic materials, the rearrangement and plastic deformation stages of the force displacement curve were found to be in reasonable agreement with experiments. In an attempt to account for the final compression stage, elastic deformation of the compact, a simple modification of the contact model was proposed. This modification amounted to the introduction of a maximal plastic overlap, beyond which elastic deformation was the only deformation mode possible. Our results suggest that the proposed model provides an improved, although not perfect, 2 description of granule bed compression at high relative densities and hence may be used as a basis for future improvements.

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“…These were originally developed for application in soil mechanics and geotechniques. These models have been adapted to model the compaction of metal powders [20], ceramic powders [21], and pharmaceutical powders [22][23][24][25], in biomass industry for corn stover and switchgrass by Kaliyan and Morey [12] and numerous other models involving other powder compaction industry.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Characterization of Reed Canary Grass Pellet Formation Phenomenon

Dhamodaran

Afzal

2013

IJRSE

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Abstract:The behaviour of pelletized reed canary grass (RCG) with selected feedstock and process parameters was studied for variation in springback characteristics based on axial changes after the compaction process. Experiments were carried out using a uniaxial single piston cylinder assembly with a proportional integral derivative temperature controller which was built in house for research purposes. A Multiple linear regression analysis based on moisture, temperature, pressure, hold time and their interaction terms was carried out to predict the length of pellets under compression in the die and excellent correlation were obtained. A finite difference method with over relaxation technique was successfully adopted to analyse the pressure and density distributions of biomass under compressive load. The compact geometry and friction between particles and die wall had effects on the pressure and density distributions in the compacted biomass. RCG pellets with lowest expansion were subjected to axial and diametrical compression tests. Bonding and failure analysis were carried out using scanning electron microscope which showed uneven breakage and interparticle voids.

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The effect of wall friction in the compaction of pharmaceutical tablets with curved faces: a validation study of the Drucker–Prager Cap model

Cited by 184 publications

References 26 publications

Models of pressure compaction and their application for wheat meal

Models of pressure compaction and their application for wheat meal

An experimental evaluation of the accuracy to simulate granule bed compression using the discrete element method

Modeling and Characterization of Reed Canary Grass Pellet Formation Phenomenon

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