Finite element simulation of the rolling and extrusion of multi-phase materials Application to the rolling of prepared sugar cane

Owen, D. R. J.; Neto, E. A. de Souza; Zhao, S.Y.; Perić, D.; Loughran, J.G.

doi:10.1016/s0045-7825(97)00173-4

Cited by 16 publications

(15 citation statements)

References 8 publications

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“…Usually, the milled mixture of sugar cane is assumed to be an isotropic continuous porous medium, which is a saturated solid–liquid two‐phase material (Adam & Loughran, ; Kannapiran, ; Li, Li, Mao, & Huang, ; Loughran & Kannapiran, ; Owen, Souza Netoa, & Zhao, ). For the isotropic elastic materials, the general selections of elastic parameters are usually the Young's modulus

E

and Poisson's ratio

ν

(Peng, Cai, Wang, & Zhou, ).…”

Section: Methodsmentioning

confidence: 99%

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Sensitivity of important parameters in a three‐dimensional simulation of the milling process of sugar cane with modified Drucker–Prager Cap model based on evolutionary material properties

Duan

Mao

Huang

et al. 2019

J Food Process Preserv

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The properties of the milled mixture of sugar cane change greatly during the milling process. The evolution of its properties was modeled using three‐dimensional simulation method of the modified Drucker–Prager Cap model. Parameters for the model were determined by dynamic compression tests and simulated contrast test and employed to analyze the changes of roll load, roll torque, the maximum speed of sugar juice, stress, pore pressure, and the maximum void ratio under compression ratios of 1.5–3.5, blanket thicknesses of 40–140 mm, roll diameters of 700–1000 mm, and roll surface speeds of 0.1–0.5 m/s. The following results have been found: compression ratio plays the leading role in stress, pore pressure, roll load, and roll torque which increase with it; blanket thickness is of primary importance for maximum void ratio which increases with it; and roll surface speed has the most obvious effect on maximum sugar juice speed which increases with it. The method of this paper might provide a more accurate prediction for the optimization of these important parameters during the milling process of sugar cane. Practical applications The properties of the milled mixture of sugar cane change greatly during the milling process. However, the material properties for the constitutive model adopted by the researchers were the mean values of those measured. As a result, the predicted results obtained by the model based on the average values of these parameters are different from those obtained by the actual tests. We evolved the law of variation of parameters and adopted a three‐dimensional simulation method of the modified Drucker–Prager Cap model to the milling process of sugar cane. Our results show compression ratio is most important for stress, pore pressure, roll load, and roll torque which increase with it; blanket thickness and roll surface speed are of primary importance for maximum void ratio and the most obvious effect on maximum sugar juice speed which increases with them. Information presented here can serve as a guidance for a more accurate prediction for the optimization of these important parameters during the milling process of sugar cane.

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E

and Poisson's ratio

ν

(Peng, Cai, Wang, & Zhou, ).…”

Section: Methodsmentioning

confidence: 99%

“…Usually, the milled mixture of sugar cane is assumed to be an isotropic continuous porous medium, which is a saturated solid-liquid two-phase material (Adam & Loughran, 2005;Kannapiran, 2003;Li, Li, Mao, & Huang, 2017;Loughran & Kannapiran, 2005;Owen, Souza Netoa, & Zhao, 1998 (1)…”

Section: Elastic Parametersmentioning

confidence: 99%

Sensitivity of important parameters in a three‐dimensional simulation of the milling process of sugar cane with modified Drucker–Prager Cap model based on evolutionary material properties

Duan

Mao

Huang

et al. 2019

J Food Process Preserv

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“…Adaptive remeshing (using existing code 9 and methodologies 10 as a basis) was employed to overcome the high mesh distortion as the extrusion process continues, using the L2 error in effective pressure stress as a guide for mesh construction. The use of adaptive remeshing in soil mechanics simulations has been extremely limited thus far due to difficulties in implementation 11 and was a major issue, as it had to be performed ∼2000 times for the simulations described here, mostly due to distortion in the elements flowing around the die entry corner. As a result, the model absorbs much processor time and the provisional simulation results were attained for a shorter barrel length (H/D 0 = 1.5), die-land length (L/D = 4.2) and contraction (D/D 0 = 0.2) than used in the experimental programme.…”

Section: Model Developmentmentioning

confidence: 99%

Maldistribution of fluids in extrudates

Patel

Wedderburn

Blackburn

et al. 2009

Journal of the European Ceramic Society

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“…Although adaptive procedures for nonlinear problems are not as well understood as those for linear problems, several techniques have been presented by, among others, Wiberg et al (1996), Barthold et al (1998), and Rannacher and Suttmeier (1998) for plasticity problems, Wriggers and Scherf (1998) for contact problems in plasticity, Yang et al (1989), Zienkiewicz et al (1990), and Owen et al (1998) for forming processes, and Ortiz and Quigley (1991), Batra and Ko (1992), Peric Â et al (1994), and Zienkiewicz et al (1995) for strain localization problems. The book edited by Ladeve Áze and Oden (1998) presents error estimators for nonlinear time dependent problems and corresponding adaptive computational methods.…”

Section: Concluding Remarks and Extensionsmentioning

confidence: 99%

A methodology for adaptive finite element analysis: Towards an integrated computational environment

Paulino

Menezes

Neto

et al. 1999

Computational Mechanics

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This work introduces a methodology for selfadaptive numerical procedures, which relies on the various components of an integrated, object-oriented, computational environment involving pre-, analysis, and post-processing modules. A basic platform for numerical experiments and further development is provided, which allows implementation of new elements/error estimators and sensitivity analysis. A general implementation of the Superconvergent Patch Recovery (SPR) and the recently proposed Recovery by Equilibrium in Patches (REP) is presented. Both SPR and REP are compared and used for error estimation and for guiding the adaptive remeshing process. Moreover, the SPR is extended for calculating sensitivity quantities of ®rst and higher orders. The mesh (re-)generation process is accomplished by means of modern methods combining quadtree and Delaunay triangulation techniques. Surface mesh generation in arbitrary domains is performed automatically (i.e. with no user intervention) during the self-adaptive analysis using either quadrilateral or triangular elements. These ideas are implemented in the Finite Element System Technology in Adaptivity (FESTA) software. The effectiveness and versatility of FESTA are demonstrated by representative numerical examples illustrating the interconnections among ®nite element analysis, recovery procedures, error estimation/adaptivity and automatic mesh generation.Key words ®nite element analysis, error estimation, adaptivity, h-re®nement, sensitivity, superconvergent patch recovery (SPR), recovery by equilibrium in patches (REP), object oriented programming (OOP), interactive computer graphics. IntroductionThis work presents an integrated (object-oriented) computational environment for self-adaptive analyses of generic two-dimensional (2D) problems. This environment includes analysis procedures to insure a given level of accuracy according to certain criteria, and also the procedures to generate and modify the ®nite element discretization. This computational system, called FESTA (Finite Element System Technology in Adaptivity), involves ®ve main components (see shaded boxes in Figure 1):A graphical preprocessor, for de®ning the geometry of the problem, the initial ®nite element mesh (together with boundary conditions), and the main parameters used in a self-adaptive analysis. Here the geometrical model is dissociated from the ®nite element model. A ®nite element module for solving the current boundary value problem. The code has been developed so that it is highly modular, expandable, and user-friendly. Thus, it can be properly maintained and continued. Moreover, other users/developers should be able to modify the basic programming system to ®t their speci®c applications. An error estimation and sensitivity module. Discretization errors are estimated according to available recovery procedures, e.g. Zienkiewicz and Zhu (ZZ), superconvergent patch recovery (SPR) and recovery by equilibrium in patches (REP). Sensitivities of various orders (1st., 2nd. or higher) are calculated by means of...

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Finite element simulation of the rolling and extrusion of multi-phase materials Application to the rolling of prepared sugar cane

Cited by 16 publications

References 8 publications

Sensitivity of important parameters in a three‐dimensional simulation of the milling process of sugar cane with modified Drucker–Prager Cap model based on evolutionary material properties

Sensitivity of important parameters in a three‐dimensional simulation of the milling process of sugar cane with modified Drucker–Prager Cap model based on evolutionary material properties

Maldistribution of fluids in extrudates

A methodology for adaptive finite element analysis: Towards an integrated computational environment

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