Determination of constitutive relation from miniature tensile test with digital image correlation

Zhang, Yunlu; Karnati, Sreekar; Pan, Tan; Liou, Frank W.

doi:10.1177/0309324719892732

Cited by 11 publications

(6 citation statements)

References 27 publications

(51 reference statements)

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“…Compared with traditional measurement methods, DIC is a non-destructive testing, and it can realize real-time measurement and have high calculation accuracy. 21–24 Therefore, DIC has been used by some scholars to study the fracture characteristics of cementious materials gradually. Corr et al 22 found that the distributed softening at the carbon fiber–reinforced plastic (CFRP)–substrate interface occurs ahead of macrocrack formation by DIC technique.…”

Section: Introductionmentioning

confidence: 99%

A study of loading rate effect fracture behavior of concrete based on digital image correlation and finite-element method

Chen

Cheng

et al. 2020

The Journal of Strain Analysis for Engineering Design

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To study the rate effect on the fracture properties of concrete, 700 mm × 150 mm × 100 mm specimens with a 60-mm notch were used for three-point bending test at the loading rate of 0.0005, 0.005, 0.05, and 0.5 mm/s, respectively. In the test, digital image correlation was used for monitoring the fracture process. The result shows that the fracture stress, unstable fracture toughness, and fracture energy have rate sensitivity. The numerical simulation was performed by extended finite-element model. The model calibration had a very good agreement with the experimental result under different loading rate. Meanwhile, fracture process zone length calculated by digital image correlation is similar to the result obtained by the extended finite-element model under different loading rate.

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Section: Introductionmentioning

confidence: 99%

A study of loading rate effect fracture behavior of concrete based on digital image correlation and finite-element method

Chen

Cheng

et al. 2020

The Journal of Strain Analysis for Engineering Design

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“…The amplitude of vertical strain at the crack tip and its effect on the area around the crack are two factors used to explain the crack propagation tendency [4,[35][36][37]. These two factors can be implemented utilizing the full-field displacement distribution acquired from the DIC technique [13,38]. The pre-cut crack length of 3 mm on the samples and ROI values of 5 × 5 mm 2 near the crack tip were compared.…”

Section: Investigation Of Strain Distributionmentioning

confidence: 99%

“…The use of full-field optical techniques to measure materials' displacement and surface deformation has recently increased significantly. Digital image correlation (DIC) is a measurement technique widely used in experimental mechanics because its advantages include non-contact, fullarea optical measurement, high sensitivity, no special environmental requirements, and easy handling [12][13][14][15]. In this method, the deformation carrier is the tracking speckle patterns sprayed on the material surface or the area of interest.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Crack Propagation in the Graphene/Synthetic Rubber Nanocomposite Materials with DIC Technique

Kasım¹,

Aldeen

Onat

et al. 2022

Period. Polytech. Chem. Eng.

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This study investigated the crack propagation behavior of the graphene-reinforced synthetic rubber matrix nanocomposite materials. Graphene-filled rubber conductive nanocomposites developed within the scope of this study were obtained in two stages using mechanical mixers. The relationship between crack propagation and electrical resistance change was investigated using single-edge notched specimens in a tensile tester. Digital image correlation (DIC) technique was used to observe the crack resistance function depending on the local strain distribution. The results from the tests were evaluated to define the relationship between the crack length, the amount of conductive filler, and the change in electrical resistance. The sharp edges of the graphene nanoplatelets negatively affected the fracture resistance of the samples. In addition, it was observed that even at low strain values, gaps were formed in the areas close to the crack tip. The three-dimensional transmission network formed by graphene nanoplatelets dispersed in the matrix improved the electrical conductivity properties of the nanocomposites, so the relationship between crack propagation and electrical resistance change was determined.

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“…In this study, the r p measurement was achieved by DIC, which has already been successfully utilized in strain measurements. [51][52][53][54]…”

Section: Theoretical Analysismentioning

confidence: 99%

Improving the tensile property calculations with plastic zone radius measurements in depth-sensing spherical indentation tests

Zhang

Shang

et al. 2021

The Journal of Strain Analysis for Engineering Design

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Depth-sensing spherical indentation tests (SITs) have been widely used in tensile property calculations, but the accuracy and reproducibility of calculations may be significantly influenced by displacement measurement errors. Taking two representative tensile property calculation methods as examples, namely the analytical and numerical methods, the rationale as to why accurate and reproducible tensile property calculations cannot be expected from the depth-sensing SITs was discussed in detail. Subsequently, the proportional limit σ0 calculation from plastic zone radius rp measurements, which was analytically developed in the expanding cavity model (ECM) and experimentally measured by digital image correlation (DIC), was introduced to enhance the accuracy and reproducibility of the two representative methods. Principles for setting the strain threshold εth were established, and factors influencing the σ0 calculation from rp measurements were investigated through the optical system, the friction condition, the hardening behaviors of specimen materials, and the indentation depth. Through finite element calculations, it was proven that tensile property calculations at the existence of displacement measurement errors, particularly the constant error from the origin correction, can be significantly improved with the introduction of rp measurements. Similar findings were also observed in experiments on four metals that exhibited different hardening behaviors.

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Determination of constitutive relation from miniature tensile test with digital image correlation

Cited by 11 publications

References 27 publications

A study of loading rate effect fracture behavior of concrete based on digital image correlation and finite-element method

A study of loading rate effect fracture behavior of concrete based on digital image correlation and finite-element method

Investigation of the Crack Propagation in the Graphene/Synthetic Rubber Nanocomposite Materials with DIC Technique

Improving the tensile property calculations with plastic zone radius measurements in depth-sensing spherical indentation tests

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