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Title: Debonding and stretching of biogenic cellular structures
Author: Safar, Alexander
ISNI:       0000 0004 8509 077X
Awarding Body: Cardiff University
Current Institution: Cardiff University
Date of Award: 2019
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Plant material can regulate the mechanical properties of its cellular structure by changing: (i) the structure of the cell wall, (ii) the cell core pressure, and (iii) the cell-cell cohesion. The relevant scale at which such phenomena occur, though beyond the capacity of the human eye, can be followed by mechanical analysis and mathematical models based on micro-structural evidence. This thesis focuses on two fundamental mechanical aspects. First, it concerns the mechanism of cell debonding, as this is key in explaining the softening of fruit and legumes during storage or cooking, and is decisive for the perceived quality of food products. Particular attention is given to the mathematical modelling of damage through shear deformation as this has been largely neglected in the literature due to many theoretical and computational difficulties. Second, it provides a multiscale hyperelastic framework which relates the stresses and strains of a whole structure to those at the cell level, and vice versa. Specifically, the non-linear elastic moduli at the macroscopic level are derived systematically from those at the cell level.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QA Mathematics