Effect of the loading rate on compressive properties of goose eggs

Nedomová, Šárka; Kumbár, Vojtěch; Trnka, Ján; Buchar, J.

doi:10.1007/s10867-015-9403-2

Cited by 7 publications

(6 citation statements)

References 20 publications

(20 reference statements)

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“…This situation is different from the compression between two plane plates (see Fig. 1) where the compression rate is constant [13]. The egg shortening increases to some maximum and then slowly decreases.…”

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confidence: 75%

“…The first data were obtained in the papers [1,5] for hen eggs. The effect of loading rate on the eggshell rupture force has been also found for Japanese quail eggs [12] and for goose eggs [13]. This procedure enables studying of the influence of loading rate over a relatively narrow range of this quantity.…”

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confidence: 83%

“…The knowledge of these radii is very useful, namely for the solution of contact problems (impact of bodies, etc.). The values of the main parameters describing the egg geometry together with the egg mass are given in [13]. In this paper, these data are presented only for goose eggs used in high-rate compression tests.…”

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confidence: 99%

“…The results of goose egg compression between two plane plates are presented in Nedomová et al [13]. The dependence of the rupture force on the compression velocity is displayed in Fig.…”

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confidence: 99%

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A new approach to analyze the dynamic strength of eggs

et al. 2016

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The mechanical behavior of eggshell was determined in terms of average rupture force and corresponding deformation. For the experiment, we selected goose eggs (Anser anser f. domestica). Samples of eggs were compressed along their x-axis and z-axis. The effect of the loading orientation can be described in terms of the eggshell contour curvature. Two different experimental methods were used: compression between two plates (loading rates up to 5 mm/s) and the Hopkinson split pressure bar technique. This second method enables achieving loading rates up to about 17 m/s. The response of goose eggs to this high loading rate was characterized also by simultaneous measurement of the eggshell surface displacements using a laser vibrometer and by the measurement of both circumferential and meridian strains. Keywords Eggs . Compression . Dynamic loading . HSPB technique . Rupture forceThe egg is a packaged food. One of the important quality aspects of packaged eggs is the mechanical strength of the egg shell [1]. Breaking of the eggshell is due to the forces acting on the eggs under static and/or quasi-static conditions, as at the bottom of the pile of loaded trays, but the greatest part occurs under dynamic conditions, e.g., when an egg falls on to the cage bottom at oviposition and in the many other events, which are collected by Carter [2]. The dynamic loading can also lead to the vibration of the egg liquid products. The eggs thus serve

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confidence: 75%

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confidence: 83%

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confidence: 99%

“…The results of goose egg compression between two plane plates are presented in Nedomová et al [13]. The dependence of the rupture force on the compression velocity is displayed in Fig.…”

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confidence: 99%

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A new approach to analyze the dynamic strength of eggs

et al. 2016

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“…Overall, these studies suggest that the radius of curvature strongly influences the breaking force, adding a layer of complexity to earlier studies which conclude that shell thickness is the primary factor affecting the force at which eggs fail under mechanical loading. Interestingly, two recent studies using Hopkinson split pressure bar have shown that the rupture force is independent of the eggshell curvature during dynamic loading [30,31].…”

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confidence: 99%

Nature's technical ceramic: the avian eggshell

Hahn

Sherman

Pissarenko

et al. 2017

J. R. Soc. Interface.

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Avian eggshells may break easily when impacted at a localized point; however, they exhibit impressive resistance when subjected to a well-distributed compressive load. For example, a common demonstration of material strength is firmly squeezing a chicken egg along its major axis between one's hands without breaking it. This research provides insight into the underlying mechanics by evaluating both macroscopic and microstructural features. Eggs of different size, varying from quail (30 mm) to ostrich (150 mm), are investigated. Compression experiments were conducted along the major axis of the egg using force-distributing rubber cushions between steel plates and the egg. The force at failure increases with egg size, reaching loads upwards of 5000 N for ostrich eggs. The corresponding strength, however, decreases with increasing shell thickness (intimately related to egg size); this is rationalized by a micro-defects model. Failure occurs by axial splitting parallel to the loading direction-the result of hoop tensile stresses due to the applied compressive load. Finite-element analysis is successfully employed to correlate the applied compressive force to tensile breaking strength for the eggs, and the influence of geometric ratio and microstructural heterogeneities on the shell's strength and fracture toughness is established.

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Numerical and experimental investigation of the effect of intact egg orientation and yolk positions on heat transfer and cold point location

Wantha

2024

Heat Trans

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This paper explores the effects of egg orientation and yolk position during thermal processing using computational fluid dynamics simulation and experimentation. A carboxymethyl cellulose suspension was used to simulate the egg white, and a two‐dimensional model incorporated an air cell near the larger end. The simulation included four cases: two focused on vertical orientation with the yolk at the rear shell and the geometric center, and two on horizontal orientation with similar yolk positions. Repositioning the yolk in a horizontal orientation near the eggshell resulted in significant temperature variations. The findings show that a horizontal egg position, especially with the yolk near the eggshell, led to a significant 8%–16% reduction in heating times. This configuration also improved pasteurization efficiency, assessed by the F value, by about 13.8%. The study also revealed distinct flow patterns influenced by buoyancy forces, significantly related to temperature distribution inside the egg.

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Effect of the loading rate on compressive properties of goose eggs

Cited by 7 publications

References 20 publications

A new approach to analyze the dynamic strength of eggs

A new approach to analyze the dynamic strength of eggs

Nature's technical ceramic: the avian eggshell

Numerical and experimental investigation of the effect of intact egg orientation and yolk positions on heat transfer and cold point location

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