A PRACTICAL METHOD FOR TENSILE TESTING OF APPLE TISSUE
- 1 June 1983
- journal article
- research article
- Published by Wiley in Journal of Texture Studies
- Vol. 14 (2) , 155-164
- https://doi.org/10.1111/j.1745-4603.1983.tb00341.x
Abstract
Granny Smith apple specimens were subjected to tensile loading at three deformation rates, 20, 50 and 100 mmXmin−1. Specimens were loaded either to failure or subjected to a load cycle less than required to cause fracture. The mode of failure observed was a sudden crack across the entire specimen perpendicular to the applied force. Unbroken specimens demonstrated considerable hysteresis losses during loading and unloading.Apparent and real fracture resistance values were calculated from the energy dissipated during cracking and crack surface area. Apparent fracture resistance varied from 258‐300 Jm−2, depending on deformation rate, and real fracture resistance was approximately constant at 200 Jm−2. The hysteresis ratio varied from 0.13‐0.4, depending on deformation rate, and this change in hysteresis losses explained the decrease in failure stress and failure deformation as deformation rate increased.It is postulated that fracture resistance, or the resistance to cracking is a useful tensile property of apple tissue.This publication has 5 references indexed in Scilit:
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