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Experimental investigation on scale effect of mechanical properties of heterogeneous micropolar medium materials

机译：异质微柱介质材料力学性能规模效应的实验研究

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摘要

Because it lacks sufficient descriptive power regarding the appropriate scale effect, conventional continuum mechanics is not applicable to the rapidly developing field of micro-nanoscale structures and devices. To accurately describe the scale effect on multi-scale structures, a number of high-order medium theories have been developed, with micropolar theory being the most prominent. However, because micropolar theory lacks a clear definition of the boundary displacement distribution, researchers have reached disparate conclusions regarding the scale dependence of the mechanical behaviour of heterogeneous materials. The goal of this study was to experimentally verify which set of conclusions was most accurate and determine the rationality of applying micropolar theory to micro-nanoscale structures. To achieve this, a series of three-point bendings were carried out in accordance with micropolar theory, with the experimental results confirming the scale effect in several heterogeneous micropolar medium materials. In addition, the law governing the micro element relative rotational angle was further analysed, and further analysis of the scale effect in the micropolar medium material validated the applicability of micropolar theory to the analysis of the mechanical properties of such materials.
机译：因为它缺乏对适当的尺度效应的充分描述性，所以传统的连续内力学不适用于微纳米级结构和装置的快速发展领域。为了准确地描述对多尺度结构的比例效应，已经开发了许多高阶介质理论，具有中息的最突出的。然而，由于微波利卡理论缺乏明确的边界位移分布的定义，研究人员已经达到了异构材料力学行为的规模依赖性的不同结论。本研究的目标是通过实验地验证哪一系列结论最准确，并确定将微柱理论应用于微纳米结构的合理性。为此，根据微基波理论进行了一系列三点弯曲，实验结果证实了几种异质微柱介质材料中的比例效应。此外，进一步分析了控制微元素相对旋转角度的法律，进一步分析了微柱介质材料中的比例效应验证了微波利卡理论对这些材料的机械性能分析的应用。

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