Prediction of vibration damage of apples in transportation package

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (8) : 251-256.

LI Guang, WANG Zirui, SONG Haiyan

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Abstract

A prediction method of vibration damage for apples in transportation package of apple is was proposed. The stress value of apples under vibration was predicted through the relationship between the contact area of apples on pads and loads, and whether the stress value reaches the critical stress of apple damage can be judged. Apples in different ranges of quality and diameter were chosen, and compression tests were carried out with different density and thickness of EPE pads. The curves of contact area and relative deformation of pads (S—-ΔX curves) and curves of loads and relative deformation of pads (F—-ΔX curves) were obtained, and corresponding liner fitting equations are also obtained, and the fitting degrees were more than 95%. After the instantaneous load F on apple was calculated, the relative deformation of pad ΔX at the instantaneous load could be obtained via F—-ΔX curve, and then the contact area S at this ΔX can could be gotten via S—-ΔX curve. The theoretical stress F/S could be calculated. The vibration damage of apple could be judged compared with the critical stress value of apple damage.

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transportation package of apple / EPE / vibration damage / S ?-?X curve / F ?-?X curve

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LI Guang, WANG Zirui, SONG Haiyan. Prediction of vibration damage of apples in transportation package[J]. Journal of Vibration and Shock, 2018, 37(8): 251-256

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