Abstract

During operation, working bodies of agricultural machines interact with plants experiencing various deformations, including stretching of groups of stems. To design mechanisms of agricultural machines, it is necessary to know patterns of behavior of plant materials under deformation. The aim of this study is to develop a refined method for determining the patterns of changes in the force required for stretching a group of plant materials depending on their relative elongation and taking into account different shapes and areas of stem cross-sections. A refined method for determining the patterns of changes in the force required for stretching a group of parallel stems is given graphoanalytically, in which a polyline is traced. Dependences are obtained for determining the tensile strength of a layer of parallel and chaotically stacked stems taking into account the length of plants' interaction sections and the thickness and density of the layer, and conditions for stretching the layer are identified. The research results are intended for use in the computational and theoretical basis of engineering methods for designing agricultural machinery mechanisms taking into account specific properties of plant materials as deformable mechanical systems.

中文翻译：

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确定植物材料中一组茎的拉伸模式的方法

摘要

在操作过程中，农机的工作体会与经历各种变形（包括茎秆拉伸）的植物相互作用。为了设计农业机械的机制，有必要了解植物材料在变形下的行为模式。这项研究的目的是开发一种精确的方法，用于确定拉伸一组植物材料所需的力的变化模式，该方法取决于植物材料的相对伸长率，并考虑到茎的横截面的形状和面积。解析分析地给出了一种确定拉伸一组平行茎所需的力变化模式的改进方法，其中绘制了一条折线。考虑到植物相互作用部分的长度以及该层的厚度和密度，获得了用于确定平行且无序堆叠的茎层的抗张强度的依据，并且确定了拉伸该层的条件。该研究结果旨在用于设计农业机械机构的工程方法的计算和理论基础，并考虑到植物材料作为可变形机械系统的特定特性。