Deformation measurement in Al thin films at elevated temperatures by digital image correlation with speckles prepared by femtosecond laser

Chen, Zhiwen; Xu, Guoliang; Cao, Qiang; Ruan, Meng; Liu, Sheng; Hui-ming, Pan; Liu, Li

doi:10.1016/j.optlastec.2022.108339

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…This methodology enabled the assessment of the deformation of a C/C composite sample at 2000 8C within an inert atmosphere. Chen et al (2022b) devised a fully customizable speckle preparation technique utilizing pulsed laser technology, facilitating the creation of ideal speckle patterns with excellent contrast, consistency, and controllable impact on samples for deformation measurement at elevated temperatures through DIC. Laser speckle, in comparison to artificial speckle, emerges as a more promising alternative for conveying deformation information via digital image correlation at high temperatures, notably exceeding 1,600 8C.…”

Section: Review Of Digital Image Correlationmentioning

confidence: 99%

“…This methodology enabled the assessment of the deformation of a C/C composite sample at 2000 °C within an inert atmosphere. Chen et al . (2022b) devised a fully customizable speckle preparation technique utilizing pulsed laser technology, facilitating the creation of ideal speckle patterns with excellent contrast, consistency, and controllable impact on samples for deformation measurement at elevated temperatures through DIC.…”

Section: Core Issues and Research Status In Dicmentioning

confidence: 99%

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Review of research progress and development trend of digital image correlation

He,

Zhou,

Liu

et al. 2023

MMMS

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PurposeThe purpose of this paper is to provide a comprehensive review of a non-contact full-field optical measurement technique known as digital image correlation (DIC).Design/methodology/approachThe approach of this review paper is to introduce the research pertaining to DIC. It comprehensively covers crucial facets including its principles, historical development, core challenges, current research status and practical applications. Additionally, it delves into unresolved issues and outlines future research objectives.FindingsThe findings of this review encompass essential aspects of DIC, including core issues like the subpixel registration algorithm, camera calibration, measurement of surface deformation in 3D complex structures and applications in ultra-high-temperature settings. Additionally, the review presents the prevailing strategies for addressing these challenges, the most recent advancements in DIC applications across quasi-static, dynamic, ultra-high-temperature, large-scale and micro-scale engineering domains, along with key directions for future research endeavors.Originality/valueThis review holds a substantial value as it furnishes a comprehensive and in-depth introduction to DIC, while also spotlighting its prospective applications.

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Section: Review Of Digital Image Correlationmentioning

confidence: 99%

Section: Core Issues and Research Status In Dicmentioning

confidence: 99%

Review of research progress and development trend of digital image correlation

He,

Zhou,

Liu

et al. 2023

MMMS

View full text Add to dashboard Cite

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“…For instance, Grant et al [20] prepared the speckle patterns by abrading the sample surface with a 1200 grit silicon carbide paper to assure a homogeneous distribution of scratches without any preferential directions. In addition, customizable engraving speckles with femtosecond laser were also proposed for the DIC measurement at elevated temperatures [21]. Although both these two methods do not require additional speckle materials, the specimen surface could be damaged by the femtosecond laser or the silicon carbide paper, leading to the concentration of residual stress [11].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Ultra-Stable and Customized High-Temperature Speckle Patterns Using Air Plasma Spraying and Flexible Speckle Templates

Lu,

Yu,

Wang

et al. 2023

Sensors

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Reliable and accurate full-field deformation measurements at elevated temperatures using digital image correlation (DIC) require stable and high-contrast high-temperature speckle patterns to be prepared on the sample surface. However, conventional high-temperature speckle patterns fabricated by the existing methods possess several limitations, e.g., easily fail to preserve original pattern features due to the harsh environment and heavily dependent on the operator’s experience. In this study, we propose a reliable and reproducible high-temperature speckle fabrication method based on air plasma spraying (APS) and flexible speckle templates. This method involves covering the sample surface with pre-designed speckle templates and then spraying the melted speckle powders onto the specimen surface using an air plasma spray technique to obtain customized speckle patterns. The validity of the proposed method was verified by the speckle fabrication on both planar and curved samples and heating tests with these samples. Experimental results demonstrate that the speckle patterns made by the proposed method adhere well to the sample surface, remain stable during the heating process, and exhibit excellent agreement with the reference values in terms of the thermal expansion coefficients. The proposed method provides a reliable and efficient way to create customized and stable speckle patterns for accurate high-temperature DIC measurements.

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