Boundary deformation measurement by mesh-based digital image correlation method

Lu Wang; Guangyan Liu; Tongzhen Xing; Haibin Zhu; Shaopeng Ma

doi:10.3390/app11010053

Boundary deformation measurement by mesh-based digital image correlation method

Lu Wang, Guangyan Liu^*, Tongzhen Xing, Haibin Zhu, Shaopeng Ma^*

^*Corresponding author for this work

School of Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Digital image correlation (DIC) is a popular photomechanics method for deformation measurement. The conventional subset-based DIC method obtains the displacement vectors at the subset centers, but cannot calculate the deformation on the specimen edges, which may contain very useful information because specimens usually have greater deformation on edges, especially on curved edges due to stress concentration. In this study, the capability of a mesh-based DIC method using 8-node quadrilateral elements (Q8-mesh-DIC) in boundary deformation measurement was investigated and highlighted for specimens with non-uniform deformation. The results were compared with those obtained by some conventional subset-based DIC methods, and the accuracy of the boundary deformation measurement was verified through simulated and real experiments. The Q8-mesh-DIC appears to be more suitable for the boundary deformation measurement of non-uniform deformation fields.

Original language	English
Article number	53
Pages (from-to)	1-13
Number of pages	13
Journal	Applied Sciences (Switzerland)
Volume	11
Issue number	1
DOIs	https://doi.org/10.3390/app11010053
Publication status	Published - 1 Jan 2021

Keywords

Boundary deformation measurement
Digital image correlation
Non-uniform deformation field
Q8-DIC

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10.3390/app11010053

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abstract = "Digital image correlation (DIC) is a popular photomechanics method for deformation measurement. The conventional subset-based DIC method obtains the displacement vectors at the subset centers, but cannot calculate the deformation on the specimen edges, which may contain very useful information because specimens usually have greater deformation on edges, especially on curved edges due to stress concentration. In this study, the capability of a mesh-based DIC method using 8-node quadrilateral elements (Q8-mesh-DIC) in boundary deformation measurement was investigated and highlighted for specimens with non-uniform deformation. The results were compared with those obtained by some conventional subset-based DIC methods, and the accuracy of the boundary deformation measurement was verified through simulated and real experiments. The Q8-mesh-DIC appears to be more suitable for the boundary deformation measurement of non-uniform deformation fields.",

keywords = "Boundary deformation measurement, Digital image correlation, Non-uniform deformation field, Q8-DIC",

author = "Lu Wang and Guangyan Liu and Tongzhen Xing and Haibin Zhu and Shaopeng Ma",

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T1 - Boundary deformation measurement by mesh-based digital image correlation method

AU - Wang, Lu

AU - Liu, Guangyan

AU - Xing, Tongzhen

AU - Zhu, Haibin

AU - Ma, Shaopeng

PY - 2021/1/1

Y1 - 2021/1/1

N2 - Digital image correlation (DIC) is a popular photomechanics method for deformation measurement. The conventional subset-based DIC method obtains the displacement vectors at the subset centers, but cannot calculate the deformation on the specimen edges, which may contain very useful information because specimens usually have greater deformation on edges, especially on curved edges due to stress concentration. In this study, the capability of a mesh-based DIC method using 8-node quadrilateral elements (Q8-mesh-DIC) in boundary deformation measurement was investigated and highlighted for specimens with non-uniform deformation. The results were compared with those obtained by some conventional subset-based DIC methods, and the accuracy of the boundary deformation measurement was verified through simulated and real experiments. The Q8-mesh-DIC appears to be more suitable for the boundary deformation measurement of non-uniform deformation fields.

AB - Digital image correlation (DIC) is a popular photomechanics method for deformation measurement. The conventional subset-based DIC method obtains the displacement vectors at the subset centers, but cannot calculate the deformation on the specimen edges, which may contain very useful information because specimens usually have greater deformation on edges, especially on curved edges due to stress concentration. In this study, the capability of a mesh-based DIC method using 8-node quadrilateral elements (Q8-mesh-DIC) in boundary deformation measurement was investigated and highlighted for specimens with non-uniform deformation. The results were compared with those obtained by some conventional subset-based DIC methods, and the accuracy of the boundary deformation measurement was verified through simulated and real experiments. The Q8-mesh-DIC appears to be more suitable for the boundary deformation measurement of non-uniform deformation fields.

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Boundary deformation measurement by mesh-based digital image correlation method

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