In-plane deformation measurement using the atomic force microscope moiré method

Xie, Huimin; Kishimoto, Seiji; Asundi, Anand; Chai, Gin Boay; Shinya, Norio; Yu, Jianhua; Ngoi, B. K. A.

doi:10.1088/0957-4484/11/1/305

Cited by 68 publications

(48 citation statements)

References 9 publications

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“…Electron Moiré method, developed by Kishimoto et al, is a new full-field technique to measure deformations in a microscopic area, which utilizes the changes of Moiré interference fringes due to deformation (Ref [13][14][15]. The Moiré fringes are generated by the interferences of the model grid on the measured surface and the master grid of electron beams in Scanning Electron Microscope (SEM).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Strain Field Around Impacted Particles by Applying Electron Moiré Method

et al. 2007

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Recently, the thermal-spray community has focused considerable attention on cold-spray and warmspray techniques, in which the temperatures of sprayed particles are kept below their melting point and adhesion occurs based on the impact phenomenon between a solid particle and a substrate. The mechanisms of adhesion are still unclear, but the degree of the mechanical deformation at the interface is considered to be a key factor influencing this mechanism. However, it is very difficult to directly measure the strain at the interface. Instead, in this work, the strain fields on a substrate around an impacted particle sprayed by warm-spray deposition were measured by applying electron Moiré method, and compared with numerical simulation results.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Strain Field Around Impacted Particles by Applying Electron Moiré Method

et al. 2007

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“…The Moiré methods can also be subdivided into the geometric Moiré method [4], Moiré interferometry [5], the digital Moiré [6] or overlapping Moiré method, the laser scanning Moiré method (also called as laser scanning confocal microscopy Moiré) [7,8], the electron scanning Moiré method (also called as electron beam Moiré or scanning electron microscope Moiré) [9,10], the atomic force microscope Moiré method [11], the sampling Moiré method [12,13], etc. Among the aforementioned various Moiré methods, the sampling Moiré method adopts the spatial phaseshifting technique, and the other Moiré methods are usually combined with the temporal phaseshifting technique to analyze the Moiré phase for deformation measurement.…”

Section: Introductionmentioning

confidence: 99%

Interlaminar Shear Behavior of Laminated Carbon Fiber Reinforced Plastic from Microscale Strain Distributions Measured by Sampling Moire Technique

Wang¹,

Ri²,

Tsuda³

et al. 2018

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Abstract:The interlaminar shear behavior of a [±45°] laminated carbon fiber reinforced plastic (CFRP) specimen was investigated utilizing microscale strain mapping in a wide field of view. A three-point bending device was developed under a laser scanning microscope, and the full-field strain distributions including normal, shear and principal strains of CFRP in a three-point bending test were measured using a developed sampling Moiré technique. The microscale shear strain concentrations at interfaces between each two adjacent layers were successfully detected and found to be positive-negative alternately distributed before damage occurrence. The 45° layers slipped to the right relative to the -45° layers, visualized from the revised Moiré phases and shear strain distributions of the angle-ply CFRP under different loads. The absolute values of the shear strain at interfaces gradually rose with the increase of the bending load, and the sudden decrease of the shear strain peak value implied the occurrence of interlaminar damage. The evolution of the shear strain concentrations is useful in the quantitative evaluation of the potential interlaminar shear failure.

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“…The basic principle of the method and an experimental result in symmetric three-point bending are reported. Our method is partly similar to the digital moiré method [24][25][26]. In digital moiré method, the moiré fringe pattern is generated by superposition of a digital (virtual reference) grating onto the specimen grating, and then a low-pass filtering is applied to the image.…”

Section: Introductionmentioning

confidence: 99%

Sampling Moiré Method for Accurate Small Deformation Distribution Measurement

2009

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In this paper, a novel accurate deformation distribution measurement technique by using sampling moiré method is proposed. The basic principle and an experimental result of a steel beam in symmetric three-point bending are reported. In this method, the measurement area of a target is attached with an adhesive tape of a known pitch grating firstly. An ordinary CCD camera is installed on a fixed point to record the image during deformation. The captured image is analyzed by performing easy image processing, i.e., thinning-out and linear interpolation, to obtain the multiple phase-shifted moiré patterns. Then, the phase distribution of the moiré pattern can be calculated using phase-shifting method. Finally, the deformation distribution is calculated by the grating pitch times the phase difference of before deformation and after deformation. The experimental results in symmetric three-point bending test show that the displacement of the steel beam at loading point agree well with those obtained by an accurate displacement sensor. The average error of displacement measurement is less than 4 μm when 2 mm grating pitch is used, and it corresponds to 1/500 of the grating pitch accuracy. This indicates that noncontact deformation distribution measurement is possible by simple and easy procedure with high accuracy, high speed, and low cost for the structural evaluation of infrastructures.

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In-plane deformation measurement using the atomic force microscope moiré method

Cited by 68 publications

References 9 publications

Evaluation of Strain Field Around Impacted Particles by Applying Electron Moiré Method

Evaluation of Strain Field Around Impacted Particles by Applying Electron Moiré Method

Interlaminar Shear Behavior of Laminated Carbon Fiber Reinforced Plastic from Microscale Strain Distributions Measured by Sampling Moire Technique

Sampling Moiré Method for Accurate Small Deformation Distribution Measurement

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