The discrete element method (DEM) to simulate fruit impact damage during transport and handling: Model building and validation of DEM to predict bruise damage of apples

Zeebroeck, M. Van; Tijskens, Engelbert; Dintwa, E.; Kafashan, Jalal; Loodts, J.; Baerdemaeker, Josse De; Ramón, Herman

doi:10.1016/j.postharvbio.2006.02.007

Cited by 53 publications

(23 citation statements)

References 16 publications

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“…Usually, a modelling phase includes the collection of reliable data and identification a process which will be described by experimental model. Dintwa et al [29] , Kobyłka and Molenda [30] , Li et al [31] , Petrů et al [32] , Van Zeebroeck et al [33][34][35] , and Yousefi et al [36] applied a computer model to analyse the boundary values of the compression force concentrated in a small area.…”

Section: Introductionmentioning

confidence: 99%

Modeling of carrot root radial press process for different shapes of loading elements using the finite element method

Stopa

Komarnicki

Szyjewicz

et al. 2017

International Journal of Food Properties

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Biological material is exposed to different type loads during the harvesting, sorting, and transport. The contact with the hard element of the box or the harvester causes damage to the internal structure. Long-term static loads and hitting by another carrot root are the most common type of mechanical damage occurring in the post-harvest process. Because of the characteristic shape of agricultural products, compression force focused on a small area. The main purpose of this study was to determine the discrete model of carrot root as well as to verify it based on the displacement distribution.For determining an experimental model, the collected data were statistically processed. To verify the obtained model, the COSMOS/M software was applied. As a result of this study, a calculation model was presented, which allowed the assessment of surface pressures on the carrot root area, which occurred during the contact with different shaped elements in selected phases of technology process. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Modeling of carrot root radial press process for different shapes of loading elements using the finite element method

Stopa

Komarnicki

Szyjewicz

et al. 2017

International Journal of Food Properties

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“…This is analogous to the mechanical damage of cold-transported fruit as a consequence of transportation vibration, an important problem that requires careful management in agricultural transport for export [13]. A survey of the literature indicates that management of transport vibrations is one of the crucial factors in the successful transportation of living organisms as goods, and several investigations have been devoted to this subject, in particular to the impact of vibration on goods caused by various road roughnesses [14], vehicle and package resonances [15] and package handling [16].…”

Section: Introductionmentioning

confidence: 99%

The sensitivity of human mesenchymal stem cells to vibration and cold storage conditions representative of cold transportation

Nikolaev

Liu

Hussein

et al. 2012

J. R. Soc. Interface.

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In the current study, the mechanical and hypothermic damage induced by vibration and cold storage on human mesenchymal stem cells (hMSCs) stored at 2-88C was quantified by measuring the total cell number and cell viability after exposure to vibration at 50 Hz (peak acceleration 140 m s 22 and peak displacement 1.4 mm), 25 Hz (peak acceleration 140 m s 22, peak displacement 5.7 mm), 10 Hz (peak acceleration 20 m s 22, peak displacement 5.1 mm) and cold storage for several durations. To quantify the viability of the cells, in addition to the trypan blue exclusion method, the combination of annexin V-FITC and propidium iodide was applied to understand the mode of cell death. Cell granularity and a panel of cell surface markers for stemness, including CD29, CD44, CD105 and CD166, were also evaluated for each condition. It was found that hMSCs were sensitive to vibration at 25 Hz, with moderate effects at 50 Hz and no effects at 10 Hz. Vibration at 25 Hz also increased CD29 and CD44 expression. The study further showed that cold storage alone caused a decrease in cell viability, especially after 48 h, and also increased CD29 and CD44 and attenuated CD105 expressions. Cell death would most likely be the consequence of membrane rupture, owing to necrosis induced by cold storage. The sensitivity of cells to different vibrations within the mechanical system is due to a combined effect of displacement and acceleration, and hMSCs with a longer cold storage duration were more susceptible to vibration damage, indicating a coupling between the effects of vibration and cold storage.

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“…As each limb of a parallel robot is fixed to the base, this will limit the mobility of the robot. The term mobile parallel robot (MPR) in this paper refers to a class of robots which integrates the structural features of both parallel robots and mobile robots [6][7][8]. It includes a moving platform and several parallel limbs with an actuating wheel at the end of each limb [9][10].…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of a 6-DOF mobile parallel robot with 3 limbs

Zhang

Wan

et al. 2011

J Mech Sci Technol

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Mobile parallel robots (MPR), which structurally configured a moving platform and several parallel limbs with an actuating wheel at the end of each limb, exhibit advantages in high mobility, high load capability and high flexibility in complex task environments. In this paper, a 6-DOF MPR with 3-PPUU (Prismatic-Prismatic Universal-Universal) limbs is proposed. The structural scheme and inverse kinematics are first presented; the orientational workspace and the dexterity of the MPR are analyzed in detail. A parametric optimal design model is then developed; the optimal scheme of the MPR is obtained. The constant-posture control scheme and algorithm are also proposed in this paper. A prototype of the 3-PPUU MPR with omni-orientational wheels is developed and the precision for both translation and orientation of the prototype is measured by experiments, which verify the feasibility of the proposed MPR scheme.

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The discrete element method (DEM) to simulate fruit impact damage during transport and handling: Model building and validation of DEM to predict bruise damage of apples

Cited by 53 publications

References 16 publications

Modeling of carrot root radial press process for different shapes of loading elements using the finite element method

Modeling of carrot root radial press process for different shapes of loading elements using the finite element method

The sensitivity of human mesenchymal stem cells to vibration and cold storage conditions representative of cold transportation

Design and analysis of a 6-DOF mobile parallel robot with 3 limbs

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