<abstract xmlns="http://www.w3.org/1999/xhtml"><p> Dissipation hypothesis of energy under cyclic loads conditions was used to characterize the behavior of berry fruit. The possibility of dissipation of energy as a result of plastic deformations (Dawidenkow hypothesis) or visco-elastic deformations (Voigt hypothesis) was considered. Tests of hysteresis of whole fruit squeezed among two rigid plates for various levels of load and with various speeds of deformation of samples for two directions of load application were conducted for verification of the usefulness of both hypotheses. The strength tests were preceded by the test of hysteresis, the mass and the geometry of fruit were determined additionally as well as conventional density and moisture was counted. A mutual relation of average values of the coefficients of elasticity E<sub>C</sub> was accepted as the measure of dissipation of energy as a result of changes in the angle of inclination of the curve in the springy return phase. Voigt hypothesis was confirmed as useful within the range of small speeds of deformation and lack of usefulness of the Dawidenkow hypothesis was proved.</p></abstract>

Dissipation hypothesis of energy under cyclic loads conditions was used to characterize the behavior of berry fruit. The possibility of dissipation of energy as a result of plastic deformations (Dawidenkow hypothesis) or visco-elastic deformations (Voigt hypothesis) was considered. Tests of hysteresis of whole fruit squeezed among two rigid plates for various levels of load and with various speeds of deformation of samples for two directions of load application were conducted for verification of the usefulness of both hypotheses. The strength tests were preceded by the test of hysteresis, the mass and the geometry of fruit were determined additionally as well as conventional density and moisture was counted. A mutual relation of average values of the coefficients of elasticity EC was accepted as the measure of dissipation of energy as a result of changes in the angle of inclination of the curve in the springy return phase. Voigt hypothesis was confirmed as useful within the range of small speeds of deformation and lack of usefulness of the Dawidenkow hypothesis was proved.

Dissipation of Energy in Tissues of Berry Fruit of Selected Plants Species under Cyclic Load Conditions

Department of Agricultural Engineering, Wroclaw University of Environmental and Life Sciences,

Agricultural Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Dissipation hypothesis of energy under cyclic loads conditions was used to characterize the behavior of berry fruit. The possibility of dissipation of energy...

Dissipation of Energy in Tissues of Berry Fruit of Selected Plants Species under Cyclic Load Conditions

Publié en ligne: 09 févr. 2017

Pages: 5 - 14

Reçu: 01 janv. 2016

Accepté: 01 juil. 2016

DOI: https://doi.org/10.1515/agriceng-2016-0059

Mots clés
mechanical properties, hysteresis loop, energy dissipation, berries fruits

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Dissipation of Energy in Tissues of Berry Fruit of Selected Plants Species under Cyclic Load Conditions

Publié en ligne: 09 févr. 2017

Pages: 5 - 14

Reçu: 01 janv. 2016

Accepté: 01 juil. 2016

DOI: https://doi.org/10.1515/agriceng-2016-0059

Mots clésmechanical properties, hysteresis loop, energy dissipation, berries fruits

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mots clés
mechanical properties, hysteresis loop, energy dissipation, berries fruits