Investigating texture and mechanical properties of Asian pear flesh by compression tests

Pham, Quoc Thien; Liou, Nai-Shang

doi:10.1007/s12206-017-0707-y

Cited by 20 publications

(7 citation statements)

References 8 publications

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“…More fruit quality-related researches focused on the firmness change of strawberries in postharvest. Some literatures demonstrated that the firmness of strawberry mainly depended on fruit cultivar (Aliasgarian et al, 2015;Pham and Liou, 2017;Zeliou et al, 2018), storage time and condition (La Scalia et al, 2016) and fresh-keeping method (Contigiani et al, 2018;Yan et al, 2019;Zhang et al, 2018), whereas the vibration frequency had no impact on firmness (Chaiwong and Bishop, 2015;Dieter Fischer, 1990). Contigiani et al (2018) showed an approximately linear increase of stress with the strain up to the epidermis rupture point when strawberry fruit was punctured at 30 mm/min and the epidermis contributed approximately 50-55% to the firmness of the fruit before the rupture force, and the rupture force of fresh 'Albion' strawberries was 2.4~3.1 N. Ozonized water washing for 5 min along with cold storage can extend the strawberry shelf-life by decreasing fungal decay and water loss while the storage time and crop year had a significant effect on the fruit mechanics.…”

Section: Introductionmentioning

confidence: 99%

Characterization of textural failure mechanics of strawberry fruit

Zude-Sasse

et al. 2020

Journal of Food Engineering

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Fresh strawberry fruit is highly susceptible to damage during mechanical handlings. To prevent fruit macro-damage from external forces and predict damage evolution in internal tissues, the textural failure mechanics of strawberry fruit and its tissues were characterized by loading-unloading tests at different compression speeds. Strawberry fruit showed expected three stages of deformation during the loading phase, namely elastic, local plastic and structural failure deformation. Their cutoff points depended on the compression speed and loading direction, which was validated further by the corresponding visible browning processes in tissues from fruit longitudinal equatorial section. The peak force and absorbed energy depended on the loading direction and compression speed while the percentage of damaged mass only depended on the loading direction. The fruit was most susceptible to mechanical damage when it was compressed along its stem-blossom axis at low percentage deformation and along its radial axis at high percentage deformation. The absorbed energy and percentage of damaged mass of the strawberry fruit was correlated, which suggested that the absorbed energy could be an appropriate and easily measurable mechanical parameter for quantitatively assessing the degree of fruit damage. The failure stress, failure energy and elastic modulus of fruit tissues increased with the compression speed, while this factor did not affect the failure strain. The average failure stress, failure strain, failure energy and elastic modulus of fruit inner tissue were 0.093

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Section: Introductionmentioning

confidence: 99%

Characterization of textural failure mechanics of strawberry fruit

Zude-Sasse

et al. 2020

Journal of Food Engineering

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“…The basic mechanical parameters and compressive properties of fruit were analyzed by the compression test, which provides a theoretical reference for the related research. Pham & Liou (2017) studied the elastic modulus, fracture, compressive strength, and other mechanical properties of pear through a static compression test. Li et al (2018) analyzed the mechanical properties of apple cubes under compression, which established its compression mechanical model, and obtained the compressive elastic modulus of apple and the maximum elastic limit under compression.…”

Section: Static Pressure Characteristicsmentioning

confidence: 99%

Mechanical damage characteristics and nondestructive testing techniques of fruits: a review

Hou

LIU

et al. 2023

Food Sci. Technol

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Fruits will be subjected inevitably to various external forces in the process of harvesting, transportation, processing, and storage, which will cause mechanical damage. The research on mechanical properties and damage mechanisms of fruit can effectively control its loss. In this study, fruits are divided into different types according to their morphology and structure. The impact, vibration, static pressure, and other mechanical damage on fruits are studied. It is important to identify the damaged parts of fruit after damage quickly and accurately. Therefore, this study analyzes the application of nondestructive testing technologies such as spectral detection technology, NMR (nuclear magnetic resonance) detection technology, and acoustic and electrical characteristics detection technology in fruit damage detection.

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“…Establishing an accurate finite element simulation model requires precise mechanical properties (Petrů et al, 2012; Pieczywek & Zdunek, 2014; Rashvand et al, 2022). The mechanical properties of many agricultural products have been studied (An et al, 2020; Giongo et al, 2019; Jahanbakhshi et al, 2020; Kılıçkan & Güner, 2008; Pham & Liou, 2017; Pradhan et al, 2009). Nevertheless, these studies mainly focused on Elastic modulus and Poisson's ratio.…”

Section: Introductionmentioning

confidence: 99%

Experiment and finite element simulation of friction factor and stack damage between blueberries

Zheng,

Liu,

et al. 2023

J Food Process Engineering

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Blueberries are susceptible to mechanical damage during the processes of transportation and storage. This article hopes to provide some theoretical basis for the improvement of blueberry packaging based on stack damage. The Finite Element Method was applied in this research. And to obtain an accurate friction factor between small spherical fruit, a new experimental platform was built. For the first time, it was found that the friction factor between blueberry surfaces was 0.4–0.6. Subsequently, the texture analyzer was employed to perform compression tests on unit cells composed of blueberries. Through the combination of slicing observation and finite element simulations, browning results of unit cells with different stack forms were gained. The stack method adopted the larger‐sized blueberries in the upper layer and the calyx of the upper blueberries was upward, which had the least damage to the blueberries, and the blueberries could be stacked up to 214 layers.Practical ApplicationUnderstanding the impact of different stacking methods on blueberry damage is crucial for avoiding serious damage to blueberries during storage and packaging. This article accurately determined the factor of friction between the surfaces of blueberries. Based on this, the influence of the calyx and size of blueberries on stacking damage was studied through a combination of stacking experiments and finite element method. This article not only solves the problem of the lack of friction factor between blueberries, providing an effective method for measuring the friction coefficient between small spherical fruits, but also provides directions for reducing stacking damage of blueberries and extending their post‐harvest life, as well as providing a theoretical basis for improving blueberry packaging and mechanization research.

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Investigating texture and mechanical properties of Asian pear flesh by compression tests

Cited by 20 publications

References 8 publications

Characterization of textural failure mechanics of strawberry fruit

Characterization of textural failure mechanics of strawberry fruit

Mechanical damage characteristics and nondestructive testing techniques of fruits: a review

Experiment and finite element simulation of friction factor and stack damage between blueberries

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