A constitutive model for mechanical response characterization of pumpkin peel and flesh tissues under tensile and compressive loadings
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- 作者：Maryam Shirmohammadi ; Prasad K. D. V. Yarlagadda…
- 关键词：Pseudo elasticity ; Tensile loading ; Rheological response ; Compressive loading ; Finite elasticity ; Uniaxial loading ; Constitutive modelling ; Post harvesting ; Food processing
- 刊名：Journal of Food Science and Technology
- 出版年：2015
- 出版时间：August 2015
- 年：2015
- 卷：52
- 期：8
- 页码：4874-4884
- 全文大小：2,253 KB
- 参考文献：(1994-013) MATLAB R2012b. The MathWorks, Inc., Natick
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Prasad K. D. V. Yarlagadda (2)
YuanTong Gu (2)
1. Barbara Hardy Institute, University of South Australia, Adelaide, Australia
2. CPME, O Block, Queensland University of Technology, 2 George St, Brisbane, QLD, 4001, Australia - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Nutrition
Food Science
Chemistry - 出版者：Springer India
- ISSN：0975-8402
文摘
Enhancing quality of food products and reducing volume of waste during mechanical operations of food industry requires a comprehensive knowledge of material response under loadings. While research has focused on mechanical response of food material, the volume of waste after harvesting and during processing stages is still considerably high in both developing and developed countries. This research aims to develop and evaluate a constitutive model of mechanical response of tough skinned vegetables under postharvest and processing operations. The model focuses on both tensile and compressive properties of pumpkin flesh and peel tissues where the behaviours of these tissues vary depending on various factors such as rheological response and cellular structure. Both elastic and plastic response of tissue were considered in the modelling process and finite elasticity combined with pseudo elasticity theory was applied to generate the model. The outcomes were then validated using the published results of experimental work on pumpkin flesh and peel under uniaxial tensile and compression. The constitutive coefficients for peel under tensile test was α--5.66 and β-??18.48 Mpa and for flesh α-??5.29 and β--.27 Mpa. under compression the constitutive coefficients were α--.74 and β-??1.71 Mpa for peel and α--.76 and β-??1.86 Mpa for flesh samples. Constitutive curves predicted the values of force precisely and close to the experimental values. The curves were fit for whole stress versus strain curve as well as a section of curve up to bio yield point. The modelling outputs had presented good agreement with the empirical values and the constructive curves exhibited a very similar pattern to the experimental curves. The presented constitutive model can be applied next to other agricultural materials under loading in future.