豆類の圧縮強度に及ぼす温度と含水率の影響 : 大正金時の圧縮試験

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A laboratory study was conducted to determine the influence of loading conditions, temperature and moisture content of sample, crosshead speed, and harvest time on the compressive strength of Red kidney Beans (Taisho). Parallel plate compression tests were made with whole beans and the resulting forcedeformation curves were analyzed to determine the modulus of elasticity. Compression plunger tests were performed on the bean surface using cylindrical plungers with 1.1mm and 3.0mm diameter, and then critical rupture forces of the seed coat were also estimated. The conclusions derived from this study are as follows ; 1) On parallel plate compression tests, if E/1-μ^2 can be stated as the parameter of strength, E/1-μ^2 could be calculated as the function of moisture content M (% W. B.), by the following empirical formula. E/1-μ^2=0.464×10^<10> M^<-5.36> kg/cm^2 where E ; modulus of elasticity kg/cm^2 μ ; Poisson's ratio 2) The parallel plate compression test indicated that hysteresis loss of the seed with 16.84% moisture content appears to reach up to 20% with 1kg of loading. These results must be considered in case of deep bin storage. 3) On uniaxial compression with 1.1mmφ cylindrical plunger, the cross head speed over 5mm/min have no effect on the critical rupture force of seed coat. 4) In the range of 20℃ to -30℃, the critical rupture force of seed coat increases proportionally with decreasing temperature of the bean. 5) During 2 to 17 September 1974 at least the harvest time did not affect very much the rupture force of seed coat.
帯広畜産大学の論文
1977-01-17

豆類の圧縮強度に及ぼす温度と含水率の影響 : 大正金時の圧縮試験

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