Free fall analysis of orange fruit using numerical and experimental methods

Gharaghani, Bahram Namdari; Maghsoudi, Hossein

doi:10.1080/10942912.2018.1446148

Cited by 17 publications

(11 citation statements)

References 14 publications

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“…It can be assumed that, in the case of elastic deformations, i.e., deformations in which the apple returns to its initial shape after removing the load, there is no damage to the flesh tissue, so there is no danger of bruising. Tissue damage occurs only when permanent deformations appear [15].…”

Section: Impact Loads On Biological Materialsmentioning

confidence: 99%

An Attempt to Model the Surface Pressures of Apples Using the Finite Element Method

et al. 2021

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Apples are the most popular fruits grown in Polish orchards. In order to obtain the best quality fruit, it is necessary to improve plantation maintenance, fruit harvesting, and processing. Given that many fruits are exposed to external factors, including forces that adversely affect their structure—causing them to crack, bruise, or crush—it is necessary to provide conditions that do not adversely affect their quality. Therefore, the aim of this article was to develop a simplified model of an apple that could be tested under different loads using the finite element method. The parameters of the model were selected to reflect the actual apple as accurately as possible. To assess the apples under impact load, as well as the construction of the FEM model, concrete and wooden substrates were used, where apples were dropped from height of 10 mm and 30 mm. Due to this research, an apple model was obtained that reflects the actual object very well (high R2 coefficient). In addition, the layering and distribution of surface pressures of the real and model objects from the distribution are presented. This shows that the constructed model corresponds to the behaviour of the biological material, subjected to loads in real conditions.

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Section: Impact Loads On Biological Materialsmentioning

confidence: 99%

An Attempt to Model the Surface Pressures of Apples Using the Finite Element Method

et al. 2021

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“…In contrast, the explicit method does not require assembly or decomposition of the stiffness matrix, saving computer time and resources. The implicit method leads to an acceptable solution with a time step one to two orders of magnitude larger than the critical time step required by the explicit method (Gharaghani & Maghsoudi, 2018). As a result, the explicit calculation method was used in this simulation.…”

Section: Methodsmentioning

confidence: 99%

Finite element analysis of blueberry stack damage

Zheng

Jing-hui

Tian

et al. 2021

J Food Process Engineering

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Blueberries are prone to mechanical damage during the processes of grading, packaging, transportation, and selling, and stack damage is one of the important causes of blueberry quality loss. The mechanical parameters of blueberry should be obtained firstly to create the mechanical model for analyzing the stack problems of multilayer blueberries. Precise mechanical parameters were obtained for the first time by performing a compression experiment and analyzing an explicit dynamics simulation based on the finite element model. It was found that the elastic modulus of the blueberries was 0.225 MPa and that the Poisson's ratio of the blueberries was 0.35. The placement direction of the blueberries had the greatest impact on the rupture force, followed by the number of stacked layers and the loading speed. A regression model

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“…The destruction of the internal structure of the fruit caused by the deconstruction experiment affects the measurement accuracy of the mechanical properties. In order to reduce significant errors in the measured fruit mechanical properties through physical experiments, image processing technology and digital modeling technology are used to measure the amount of fruit deformation, contact area (Gharaghani & Maghsoudi, 2018), and mechanical damage sensitivity (Stopa, Szyjewicz, Komarnicki, & Kuta, 2018). However, the shape and internal structure of agricultural products are so complex that it is difficult to accurately obtain their mechanical properties by mechanics experiments.…”

Section: Practical Applicationsmentioning

confidence: 99%

“…In this article, R. roxburghii fruits were compressed through the A large number of literatures show that there are three main methods for determining the elastic modulus of fruit, including Hooke's theory, Hertz's theory, and Boussinesq's theory (Shirvani, Ghanbarian, & Ghasemi-Varnamkhasti, 2014). Among them, the calculation method based on Hertz's theory is widely used to calculate the apparent elastic modulus and maximum contact stress of convex fruits (Gao, Song, Rao, & Ying, 2018;Gharaghani & Maghsoudi, 2018;Khodabakhshian & Emadi, 2015). Therefore, the Hertz's theory was utilized to determine the apparent elastic modulus of the fruit (ASABE, 2008), as shown in Equation ( 2),…”

Section: Compression Experimentsmentioning

confidence: 99%

“…where R means radius of curvature (mm); A, C, and D are contact points of analog height meter probes on sample surface and point B is Poisson's ratio is a constant defined as the relationship between the amount of deformation of an elastic material in the transverse and longitudinal directions. Poisson's ratio of R. roxburghii samples were calculated by the following equation (Gharaghani & Maghsoudi, 2018):…”

Section: Compression Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Finite element simulation of mechanical properties of Rosa roxburghii under compression loading

Lang

Xie

Chen

2021

J Food Process Engineering

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It is very necessary to understand the mechanical properties of Rosa roxburghii fruit for harvesting, packaging, processing, transportation, storage, and related equipment design and improvement. This research was to determine the mechanical properties of R. roxburghii fruits through compressive experiments and finite element simulations and to verify the accuracy of the finite element model. In order to achieve finite element analysis, an accurate three-dimensional (3D) geometric model was reconstructed by applying 3D laser technology and point cloud reconstruction algorithm. The elastic modulus and Poisson's ratio of R. roxburghii fruits were determined to be 4.0 MPa and 0.35 through experiments. The finite element simulation results provided valuable numerical data and visualized stress distribution. The simulation results showed that R. roxburghii fruits were damaged under the loads of 156.2 N (vertical) or 148.3 N (horizontal), with a maximum deformation of 5.0 mm (vertical) or 6.93 mm (horizontal), respectively. In the vertical and horizontal compression posi-

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Free fall analysis of orange fruit using numerical and experimental methods

Cited by 17 publications

References 14 publications

An Attempt to Model the Surface Pressures of Apples Using the Finite Element Method

An Attempt to Model the Surface Pressures of Apples Using the Finite Element Method

Finite element analysis of blueberry stack damage

Finite element simulation of mechanical properties of Rosa roxburghii under compression loading

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