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首页> 外文期刊>Micron: The international research and review journal for microscopy >Strain measurement of particle-reinforced composites at the microscale: An approach towards concurrent characterization of strain and microstructure
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Strain measurement of particle-reinforced composites at the microscale: An approach towards concurrent characterization of strain and microstructure

机译：微尺寸颗粒增强复合材料的应变测量：应变和微观结构的同时表征的一种方法

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摘要

The mechanical behavior of particle-reinforced composites is largely determined by the interaction between the reinforcing particles and matrix. Although conventional digital image correlation (DIC) allows accurate measurements of strain at microscale, it usually requires preparation of synthetic pattern on the sample surface, which would affect the observation of reinforcing particles. An approach is proposed in this work that relies solely on the reinforcing particles as DIC pattern, thereby enabling concurrent microstructure observation and strain measurement. The main idea of the approach is that only the regions of high gray level contrast shall be correlated. The approach has been tested against the benchmarks taken from the images of rigidly translated and rotated sample, and the influence of image magnification has been discussed in detail. The approach has also been applied to actual tensile test and yielded qualitatively similar results as the conventional DIC approach.
机译：粒子增强复合材料的力学行为主要通过增强颗粒和基质之间的相互作用来决定。 虽然传统的数字图像相关（DIC）允许在微尺度下精确测量菌株，但通常需要制备样品表面上的合成图案，这会影响加强颗粒的观察。 在该工作中提出了一种方法，该方法仅依赖于加强颗粒作为DIC图案，从而能够进行同时微观结构观察和应变测量。 该方法的主要思想是，只有高灰度级对比度的区域应具有相关性。 该方法已经针对从刚性翻译和旋转样本的图像采取的基准测试，并且已经详细讨论了图像放大率的影响。 该方法也已应用于实际拉伸试验，并产生定性类似的结果作为传统的DIC方法。

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