Evaluation of bruise resistance of pears to impact load

Komarnicki, Przemysław; Stopa, Roman; Szyjewicz, Daniel; Młotek, Małgorzata

doi:10.1016/j.postharvbio.2015.11.017

Cited by 71 publications

(36 citation statements)

References 25 publications

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“…In particular, the changes in metabolic processes such as ethylene production, relative electrical conductivity, respiration, and transpiration, more than often, result in a mass loss, aging, corruption, and loss of nutritional value (Hussein, Fawole, & Opara, ). These results are in accordance with that of Komarnicki, Stopa, Szyjewicz, and Młotek () on the bruise resistance of pear against impact. They reported that bruises were not visible in small loads; however, they became more and more visible with an increase in the load (Komarnicki et al., ).…”

Section: Resultssupporting

confidence: 92%

The use of CT scan imaging technique to determine pear bruise level due to external loads

Azadbakht

Torshizi

Mahmoodi

2018

Food Science & Nutrition

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X‐ray computed tomography (CT) is an effective noninvasive tool to visualize fresh agricultural commodities’ internal components and quality attributes, also imaging via X‐ray CT is a non‐destructive and well‐developed method applied in measuring the internal effects of agricultural products. In the present research, 120 healthy pears with their health verification through the CT were selected. Next, 81 healthy pears were selected and subjected to quasi‐static and dynamic loading. The impact of the incoming pressures was investigated within 5, 10, and 15 days of storage. After loading and storing with the use of CT method, the total volume and the bruise volume of the pears were measured and the ratio of the bruise volume to the volume of each pear was calculated. Quasi‐static loads were pressurized over a period of two ways; the pressure of wide edge was exerted at three force levels of 70, 100, and 130 N while the pressure of the thin edge was applied at 15, 20, and 25 N. Dynamic loading was performed by utilizing a pendulum and 300, 350, and 400 g mass. The results of the experiments indicated that in the quasi‐static loading, the maximum and minimum amounts of pear bruise were 45.138% and 0.094% of the fruit, respectively. Besides, in the case of thin edge pressures, the minimum and maximum bruise levels were 0.007% and 19.88%, respectively. These values were obtained through 5 and 15 days of storage, respectively. In the dynamic loading, the maximum and minimum amounts of pear bruise were 47.36% and 0.21% of the total fruit, respectively, occurring at 400 and 300 g mass impact.

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Section: Resultssupporting

confidence: 92%

The use of CT scan imaging technique to determine pear bruise level due to external loads

Azadbakht

Torshizi

Mahmoodi

2018

Food Science & Nutrition

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“…Therefore, these experiments have been commonly conducted including measurements of impact load by means of a pendulum test on fruit, which dropped from various heights and hit onto a hard surface (Blahovec and Paprštein 2005;Elmasry et al 2012;Komarnicki et al 2016;Opara 2007). These tests have been used, i.e., to determine the bruise susceptibility in apple.…”

Section: Introductionmentioning

confidence: 99%

Influence of Contact Surface Type on the Mechanical Damages of Apples Under Impact Loads

Komarnicki

Stopa

Szyjewicz

et al. 2017

Food Bioprocess Technol

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This paper presents an analysis of mechanical damage carried out on 'Golden Delicious' apple variety, which was subjected to impact loads during free drop against various rigid plates. For this purpose, an analysis of the contact pressure based on determined contours and surface pressure distributions at the contact point between the fruit dropped from various heights against fixed hard plates was performed. The impact test was conducted by means of Tekscan® system supported by computer verifying analysis. To obtain impact loads as well as their courses, the surface pressures and the bruise volumes were determined. Furthermore, use of ultrathin pressure sensors allowed for determination of the characteristic shape of contact area and the impact of fruit onto rigid plate. The results showed that the impact of fruit against rigid surface (concrete, wood) generates high values of maximum surface pressure and the bruise volume, observed at dropping from 10 mm. A decrease in hardness of the test material (polyethylene foam) with decreasing maximum surface pressure approximately twice was noticed. The polyethylene foam is one of the best materials which protect fruit from mechanical damage, confirmed by the relation of bruise surface to contact surface, which did not exceed 35% during the impact at 150 mm. The results of proposed studies can contribute to developing of harvest, handling, and transport processes, aiming at reduction in losses among fruit growers and production costs, i.e., by improvement of transport method.

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“…Mechanical damage in fruits and vegetables is the rupture of the cellular structure caused by mechanical interactions such as impact, cutting, abrasion, and compression. Many studies found in the literature (Li, 2013;Tezotto et al, 2011;Sousa et al, 2017;Komarnicki et al, 2016;Stropek & Golacki, 2013;Fadiji et al, 2016) carried out analyses in the laboratory and related the physiological behavior observed with the applied force or tension as the final objective.…”

Section: Introductionmentioning

confidence: 99%

Deformation of Peaches Submitted to Cyclic Loading Using the Discrete Element Method

Pinto

Ferraz

2018

Eng. Agríc.

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This study aimed to use and validate a simple contact force model that describes the behavior of peaches stored in a wooden box, loaded cyclically, by using the discrete element method. The Kelvin-Voigt contact force model was used and the cyclic loading in the simulation was performed with an amplitude of 1 mm and frequency of 12 Hz for time intervals of 3600, 5400, and 7200 s. The laboratory test was performed with a peach box attached to a vibrating table by applying the same excitation conditions used in the simulation. For validation, model results were compared with those from the laboratory test by using deformation values of fruits in the contact regions. To measure this deformation, we adapted the methodology for determining the radius of curvature. The Kelvin-Voigt linear contact model, despite its simplicity in representing the viscoelastic behavior, adequately estimated the final deformation in peaches submitted to cyclic loading.

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Evaluation of bruise resistance of pears to impact load

Cited by 71 publications

References 25 publications

The use of CT scan imaging technique to determine pear bruise level due to external loads

The use of CT scan imaging technique to determine pear bruise level due to external loads

Influence of Contact Surface Type on the Mechanical Damages of Apples Under Impact Loads

Deformation of Peaches Submitted to Cyclic Loading Using the Discrete Element Method

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