Abstract
Pears, like many other agricultural commodities, are subject to mechanical damage during harvesting andsubsequent handling. Lack of fundamental information on the mechanical tissue failure properties under dynamic loadingprompted this study. Cylindrical tissue samples of two pear cultivars (DAnjou, and Bosc) in two sizes (large, 60 to 70count, and small, 110 count) were tested to failure using dynamic axial compression at four strain rates (50, 80, 110, and150 s 1 ). Strain rate significantly affected (P < 0.05) the failure stress, failure strain and the secant elastic modulus, whileit had no effect (P > 0.05) on the shock wave speed or tissue toughness. Larger pears had higher failure stresses andlower failure strains (P < 0.05), and cultivar significantly affected all of the tissue failure properties except shock wavespeed (P > 0.05).
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