Journal: Food science and technology research 14(3), pp.221-231.
Author: Gyeong-Won Kim, Man-Soo Kim, Yasuyuki Sagara, Yeong-Hwan Bae, In-Bok Lee, Gab-Soo Do, Sung-Hyoun Lee and Suk-Won Kang.
Abstract
A procedure for determining the viscoelastic proper of apple flesh has been proposed based on compression tests and FEM optimization. Short-term simple compression tests and long-term relaxation tests were performed with cylindrical specimens of apple flesh to mechanical properties, and the viscoelastic behavior was predicted using FEM optimization models. Through short-term optimization, the elastic modules and poisson's ratio were determined by comparing two kernel functions based on 1)shear only and 2) shear and bulk terms. Long-term stress-relaxation behavior of the specimen was reasonably predicted by two FEM optimization steps within 3.8% error. The FEM optimization algorithms developed in this research might be applied to determine the viscoelastic properties of bio-materials and also to predict mechanical behavior of these materials under various loading condition.
Keywords: apple flesh, compression, stress relaxation, FEM optimization, viscoelastic properties.
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https://www.jstage.jst.go.jp/article/fstr/14/3/14_3_221/_article/-char/ja/