Texture of Plants
Fruit and vegetables are complex cellular structures in which the cells are under turgor. Using a general approach to cellular materials we can predict stiffness, and to a lesser extent strength, only of non-turgor systems such as wood and bark (Gibson and Ashby 1988). In order to analyze the texture of fruit and vegetables mathematical models for turgid cellular systems are required. There are studies on the relationship between turgor and mechanical properties of individual cells (Pitt and Davis 1984) but such models have not yet been successfully developed to describe assemblages of cells with their more complex interactions. There are models which do describe the properties of turgid tissues (Falk et al. 1958), but these have not been derived from the properties of individual cells, a development which is still only in prospect. In general, therefore, it is probably safer to use theoretical models as little as possible when trying to derive parameters or make comparisons.
KeywordsShear Failure Turgor Pressure Texture Stud Store Strain Energy Apparent Fracture Toughness
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