Drop test of pear fruit: Experimental measurement and finite element modelling

Yousefi, Somaye; Farsi, Habib; Kheiralipour, Kamran

doi:10.1016/j.biosystemseng.2016.03.004

Cited by 66 publications

(51 citation statements)

References 23 publications

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“…Xiong et al [41] used hyperspectral imaging to detect micro-damage in lychees. This technique was useful in quantifying the influence of various stages such as harvesting, preservation, storage, and transportation on lychee fruit damage [42].…”

Section: Experiments Testing Lychees' Mechanical Friction Propertiesmentioning

confidence: 99%

Development and Identification of Working Parameters for a Lychee Peeling Machine Combining Rollers and a Pressing Belt

Nguyen

Pham

et al. 2019

AgriEngineering

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This work describes the development, design, and parameter identification of a lychee peeling machine. The working principle of the machine combines two rollers with a pressing belt to separate the peel from the fruits. It was designed and its operational parameters identified on the basis of experimental data on the Thieu lychee, which currently covers about 80% of the plantation area in Vietnam. To this end, the first step was to measure the physical characteristics of the fruits, such as size, shape, and density. Moreover, the coefficient of static friction between lychees and rubber rollers, and the critical peeling force, were identified, with a view to optimizing the operational parameters later on. Results showed that a minimum tangential force of 10.5 N is needed to break the peel and separate it from the pulp. Based on the balanced force principle, various optimal machine parameters such as roller rotation speed, roller diameter, roller length, gap size between the two rollers, belt velocity, and minimum pressure of the belt were calibrated. In addition, spiral grooves were created on the roller surface to facilitate the motion of the fruits. The optimal results were roller size 900 × 100 mm (length × diameter), rotation speed 159 RPM, gap size between rollers 4 mm, belt size 850 × 60 mm (length × width), belt pressure 13.5 N, and belt velocity 140 mm/s. Using the design and operational parameters mentioned above, the machine was able to perform regularly at a throughput of 100 kg/h, as demanded by the current market. Moreover, it would be easily feasible to combine multiple pairs of rollers and pressing belts in order to increase throughput. The methodology for the design of this peeling machine and identification of working parameters with respect to experimental data could be applied in many other post-harvesting configurations.

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Section: Experiments Testing Lychees' Mechanical Friction Propertiesmentioning

confidence: 99%

Development and Identification of Working Parameters for a Lychee Peeling Machine Combining Rollers and a Pressing Belt

Nguyen

Pham

et al. 2019

AgriEngineering

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“…Several studies have been published on this subject, attempting to characterize the mechanical behaviour of different fruit varieties, both by experimental means and by computational simulations [2][3][4][5][6][7][8]. Numerical simulation is one of the most powerful techniques, however, in order to obtain reliable results a realistic model should be used.…”

Section: Introductionmentioning

confidence: 99%

A Computer Tool for 3D Shape Recovery of Fruits

Gaspar

Pascoal‐Faria

Amado

et al. 2019

AMM

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Characterizing a fruit's mechanical behavior is an important step towards reducing economic losses due to bruising. Several 3D scanning technologies allow to obtain the external geometry of a fruit, but no easily accessible tools exist for the acquisition of the geometry of internal structures such as the core. We propose a low-cost destructive method for tomographic reconstruction of a fruit from scanned slices. A method for overcoming the difficulties in registering the different images is also presented.

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“…[6] There are many researches, which have investigated the level of damage, stress distribution, and reaction of the fruits under the external forces using FEM. [7][8][9] For example, deformation behavior of the tomato fruit was investigated upon crashing. [10] In this study, at the first, a 3D model of tomato was generated in CATIA software and then in order to find mechanical properties of tomato in compression tests, simulated using FEM.…”

Section: Introductionmentioning

confidence: 99%

“…Bruise susceptibility of Pear under various impact cases were experimentally determined and modeled using FEM by. [7] Three impact heights (0.2, 0.5, and 1 m), two impact surfaces (steel and wood), two impact orientations of the fruit (vertical and horizontal), and three ripeness level (unripe, ripe, and overripe) were considered in the impact simulation scenarios. The lowest and the highest errors between the predicted and observed bruised areas calculated by the ANSYS software were 0.00% and 60.53%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Free fall analysis of orange fruit using numerical and experimental methods

Gharaghani

Maghsoudi

2018

International Journal of Food Properties

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In this research, the behavior of orange fruit under impact cases was investigated by finite-element modeling in SolidWorks simulation and experimental dropping tests. The values of 0.584 MPa and 0.24 were experimentally determined for modulus of elasticity and Poisson's ratio as a pre-requirement for simulation. In the simulation tests, orange fruits were dropped from two different heights of 2 and 3 m with a drop angle of 45°r elatives to a rigid plane. Experimental tests were also conducted to validate simulation results. Maximum equivalent stress and contact force were obtained from simulation results 0.5826 MPa and 14.95 N, respectively.

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Drop test of pear fruit: Experimental measurement and finite element modelling

Cited by 66 publications

References 23 publications

Development and Identification of Working Parameters for a Lychee Peeling Machine Combining Rollers and a Pressing Belt

Development and Identification of Working Parameters for a Lychee Peeling Machine Combining Rollers and a Pressing Belt

A Computer Tool for 3D Shape Recovery of Fruits

Free fall analysis of orange fruit using numerical and experimental methods

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