The aim of this study was to determine the compression characteristics of non-homogeneous plant materials with a complex morphological structure (beetroots, celery roots and potato tubers), to compare the analysed samples with the compression characteristics of reference materials (homogeneous isotropic structural materials: steel coil spring and vulcanised rubber), and to determine the influence of the compression rate on stress in compressed samples. Structural materials and plant materials clearly differed in compression characteristics. Excluding the short initial compression phase, the compression curves for the steel coil spring and vulcanised rubber were straight parallel lines, and the higher the crosshead speed, the higher the lines' location in the diagram. In tests conducted on plant materials, the rate of changes in compression force increased throughout the experiment with an increase in crosshead speed. The greatest variations in compression force resulting from differences in crosshead speed were observed in potato samples. The apparent retardation times determined in the developed rheological model ranged from 0.079 s for the steel coil spring to 6.863 s for potatoes. This article is protected by copyright. All rights reserved.

中文翻译：

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植物组织的压缩特异性

本研究的目的是确定具有复杂形态结构的非均质植物材料（甜菜根、芹菜根和马铃薯块茎）的压缩特性，将分析样品与参考材料（均质各向同性结构材料：钢螺旋弹簧和硫化橡胶），并确定压缩率对压缩样品中应力的影响。结构材料和植物材料的压缩特性明显不同。排除短的初始压缩阶段，钢螺旋弹簧和硫化橡胶的压缩曲线为直线平行线，十字头速度越高，线在图中的位置越高。在对植物材料进行的测试中，在整个实验过程中，压缩力的变化率随着十字头速度的增加而增加。在马铃薯样品中观察到由十字头速度差异导致的压缩力的最大变化。在开发的流变模型中确定的表观延迟时间范围从钢螺旋弹簧的 0.079 秒到马铃薯的 6.863 秒。本文受版权保护。版权所有。