Hertz Theory Application in Modeling and Analysis of Mechanical Rupture Force of Cocoa Pod
International Journal of Mechanical Engineering and Applications
Volume 4, Issue 5, October 2016, Pages: 182-188
Received: Aug. 11, 2016; Accepted: Aug. 27, 2016; Published: Sep. 21, 2016
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Authors
Josué Dzudié Fonsso, Department of Mechanical Engineering, National School of Agro-industrial Sciences, University of Ngaoundere, Ngaoundere, Cameroon
Wolfgang Nzié, Department of Mechanical Engineering, National School of Agro-industrial Sciences, University of Ngaoundere, Ngaoundere, Cameroon
Guy Edgar Ntamack, Department of Physics, Faculty of Sciences, University of Ngaoundere, Ngaoundere, Cameroon
Bienvenu Kenmeugné, Mechanical and Material Laboratory, HTTTC Kumba, University of Buea, Kumba, Cameroon
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Abstract
Cocoa seeds damage is a major problem facing cocoa farmers during breaking process. Hertz's theory on the contact forces was used for prediction of the rupture force just required to break a cocoa pod under compressive load along its lateral axis. Different varieties of cocoa pods were first subjected to compressive forces. Then they were placed on a test bench and subjected to the impact forces of steel mass dropped at different heights. The objective of this study is to improve the productivity of cacao pods breaker predicting the necessary rupture force. The model of the rupture force obtained from Hertz's theory performed good results compared with experimental values measured in the process of breaking the pods. The average ruptures forces of the cacao pods varieties "Criollo", "Forastero" and "Trinitario" have been determined. Rigidity (stiffness) of the pod was obtained from the force-deformation curve. There is a strongest correlation between the pod rigidity and the rupture force.
Keywords
Modeling, Rupture Force, Hertz Theory, Cocoa Pods, Stiffness Modulus, Force-Deformation Curve
To cite this article
Josué Dzudié Fonsso, Wolfgang Nzié, Guy Edgar Ntamack, Bienvenu Kenmeugné, Hertz Theory Application in Modeling and Analysis of Mechanical Rupture Force of Cocoa Pod, International Journal of Mechanical Engineering and Applications. Vol. 4, No. 5, 2016, pp. 182-188. doi: 10.11648/j.ijmea.20160405.13
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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