Multiple linear regression model of Golden apple's failure characteristics under repeated compressive load


  • Csaba Farkas Szent István University, Faculty of Mechanical Engineering, Department of Measurement Technology, 2100 GödöllÅ‘, Páter Károly utca 1. Tel.: +36 28 522 000/1532
  • László Fenyvesi Szent István University, Faculty of Mechanical Engineering, Department of Agricultural Engineering, 2100 GödöllÅ‘, Páter Károly utca 1. Tel.: +36 28 522 610
  • Károly Petróczki Szent István University, Faculty of Mechanical Engineering, Department of Measurement Technology, 2100 GödöllÅ‘, Páter Károly utca 1. Tel.: +36 28 522 000/1468



repeated load, fruit damage, analysis of variance, time to failure, mechanical fatigue


In this paper, the multiple linear regression model of mechanical properties related to the failure mechanism of apple tissue under repeated compressive load was investigated. More refined failure characteristics may lead to improved processing and logistics aspects of the given fruits. For our study, the following failure-related factors are considered during the cyclic measurements of Golden Delicious apples: the viscoelastic parameters, the dissipated energy, and the rupture point of the cell-structure, which is described with the time to failure parameter (TTF). For the determination of viscoelastic components, the three element Poynting-Thomson body was applied, and a closed-loop control system is identified with the measured creep data. From the hysteresis loop - in each cycle of the force-deformation parametric curve - the dissipated energy can be calculated with a numeric integration method. The rupture point of the fruit tissue - where the measuring pin is breaking through the peel and the cortex - is observed with a high-framerate video analysis, so that the time index of the failure point can be evaluated. The focus is to define the influence of the mentioned factors to the TTF parameter of the examined fruit material. During the statistical evaluation of the resulted data, the failure of time can be successfully determined with a multiple lienar regression model of the determined viscoelastic and dissipated energy variables. With the resulted equation, the failure time of Golden Delicious apples can be predicted based on the measured failure-related parameters obtained during the compressive load tests.


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How to Cite

Farkas, C., Fenyvesi, L., & Petróczki, K. (2019). Multiple linear regression model of Golden apple’s failure characteristics under repeated compressive load. Potravinarstvo Slovak Journal of Food Sciences, 13(1), 793–799.