基于环绕测点子区分割的数字图像相关方法剪切带宽度测量研究

doi:10.3969/j.issn.1000-1158.2022.01.07

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Abstract To accurately measure widths of narrow shear bands with high strain gradients, a new digital image correlation method was proposed based on the subset splitting . Through splitting the original subset of the monitored point, and making splitted subsets surround the point, a few splitted subsets were in simple deformational regions. Results of the best correlated subsets were taken as results of the point. The validity of the proposed method was verified by comparing measured fictitious shear band widths of the proposed method and the coarse-fine method, and shear band width measurement errors of two methods were analyzed in theory. It is shown that the measured fictitious shear band widths of the proposed method are not influenced by the subset size in theory. Measured shear band widths of the proposed method are less influenced by the subset size and more influenced by the monitored point spacing than of the coarse-fine method. Measured shear band widths of the proposed method are more accurate than of the coarse-fine method.

Key words： metrology shear band width digital image correlation method subset size subset splitting coarse-fine method

Received: 16 March 2020 Published: 06 January 2022

PACS:	TB931
	O348.1

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	Articles by authors
	ZHANG Bo-wen
	WANG Xue-bin
	DONG Wei

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ZHANG Bo-wen,WANG Xue-bin,DONG Wei. Measurement of Shear Band Widths Based on the Digital Image Correlation Method Considering Splitted Subsets Surrounding the Monitored Point[J]. Acta Metrologica Sinica, 2022, 43(1): 40-47.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.01.07 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I1/40

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