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首页> 外文期刊>Physica status solidi, B. Basic research >Deformation analysis of reinforced-core auxetic assemblies by close-range photogrammetry
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Deformation analysis of reinforced-core auxetic assemblies by close-range photogrammetry

机译：近距离摄影测量法对增强型铁心辅助组件的变形分析

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In this article, we present an experimental study validating the concept of the reinforced-core auxetic assemblies. The main distinctive feature of these assemblies is the presence of a reinforcing core in the microstructural units that increases the shear stiffness and thus produces negative Poisson's ratio. We tested a number of prototypes manufactured using the stereolithography and selective laser sintering methods. To measure the deformations, we employed the close-range photogrammetry method, which enables monitoring of locations of unlimited number of points from digital images. We developed a procedure for multi-point measurement of planar deformations using a single digital camera. This procedure allows for continuous measurement of deformations without interruption to the loading sequence. Camera self-calibration is based on multiple images of stable reference points, which enables high accuracy of the measurements even using a consumer grade digital camera. We compare the obtained experimental results with a simplified continuum model. We demonstrate a good agreement between the theoretical predictions and the experimental results. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
机译：在本文中，我们将进行一项实验研究，以验证增强型芯部膨胀组件的概念。这些组件的主要特点是在微结构单元中存在增强芯，该增强芯增加了剪切刚度，因此产生负泊松比。我们测试了使用立体光刻和选择性激光烧结方法制造的许多原型。为了测量变形，我们采用了近距离摄影测量法，该方法可以监视数字图像中无数个点的位置。我们开发了使用单个数码相机对平面变形进行多点测量的程序。该程序允许连续测量变形，而不会中断加载顺序。相机自校准基于稳定参考点的多幅图像，即使使用消费级数码相机也可以实现高精度的测量。我们将获得的实验结果与简化的连续模型进行比较。我们证明了理论预测和实验结果之间的良好一致性。 （C）2016 WILEY-VCH Verlag GmbH＆Co.KGaA，魏因海姆

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