Three-Dimensional Dynamic Deformation Measurements Using Stereoscopic Imaging and Digital Speckle Photography

Prentice, H. J.; Proud, W. G.

doi:10.1063/1.2263557

Cited by 3 publications

(4 citation statements)

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“…Since the 1970s, various optical approaches have been proposed. Two of the most common methods are digital image correlation (DIC) or digital speckle photography (DSP) extended through stereovision [ 3 , 4 , 5 ], and electronic speckle pattern interferometry (ESPI) with different sensitivity vectors [ 6 , 7 , 8 , 9 , 10 ]. The former techniques, which require a multi-camera system, identify the position of each object point in two frames and subsequently the relative displacement by applying a correlation algorithm to stochastic intensity patterns on the object’s surface [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Online 3D Displacement Measurement Using Speckle Interferometer with a Single Illumination-Detection Path

Lü

Wang

Bilgeri

et al. 2018

Sensors

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Measurement systems for online nondestructive full-field three-dimensional (3D) displacement based on the single-shot and multiplexing techniques attract more and more interest, especially throughout the manufacturing industries. This paper proposes an accurate and easy-to-implement method based on an electronic speckle pattern interferometer (ESPI) with single illumination-detection path to realize the online nondestructive full-field 3D displacement measurement. The simple and compact optical system generates three different sensitivity vectors to enable the evaluation of the three orthogonal displacement components. By applying the spatial carrier phase-shifting technique, the desired information can be obtained in real time. The theoretical analysis and the measurement results have proven the feasibility of this ESPI system and quantified its relative measurement error.

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Section: Introductionmentioning

confidence: 99%

Online 3D Displacement Measurement Using Speckle Interferometer with a Single Illumination-Detection Path

Lü

Wang

Bilgeri

et al. 2018

Sensors

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“…Future research using DSR should investigate the evolution of each mode of deformation with time for different projectile nose-shapes. More accurate information on the mechanical response of an ERA to impact could be obtained by M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT using stereoscopic DSR, as was done in our parallel study of the dynamic bulging of plates [15,[48][49][50] . …”

Section: Times After Impact: (A) 6 μS (B) 9 μS and (C) 19 μSmentioning

confidence: 99%

“…As with DSP, the accuracy of the technique can be improved by the use of a stereoscopic system to measure and account for out-of-plane motions [2,14,15] . An alternative method making use of holes in an X-ray opaque plate has been developed by Riegel & Grosch [16] .…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

“…This comes about through changing the degree of bulging and hence the stress field within the explosive which can in turn change where zones of intense shear form. For this reason, we performed a parallel study [15,[48][49][50] into an experimental method of determining the dynamic response of thin metal plates to impact and comparing the results with model predictions. In the research reported in this paper, we report the response of small-scale layered targets containing a PBS.…”

Section: Why Study the Response Of Explosives To Impact?mentioning

confidence: 99%

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The use of digital speckle radiography to study the ballistic deformation of a polymer bonded sugar (an explosive simulant)

Prentice

Proud

Walley

et al. 2010

International Journal of Impact Engineering

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This paper reports an initial study into the benefits of determining two-dimensional flow fields for low velocity impact on a small-scale model of explosive reactive armour (ERA) using digital speckle radiography (DSR). The model system consisted of a polymer-bonded sugar (PBS) (otherwise known as a sugarmock) confined between two mild steel plates. The DSR technique relies upon creating a layer within the specimen that is seeded with lead particles. So although radiography itself is mechanically non-invasive, the lead layer needed may change the mechanical properties of the material. DSR revealed where regions of intense shear occurred in normal impact. These regions are likely to be where a polymer-bonded explosive (PBX) would initiate.

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A single camera three‐dimensional digital image correlation system for the study of adiabatic shear bands

White

Patten

Wan

et al. 2017

Strain

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We describe the capability of a high resolution three-dimensional digital image correlation (DIC) system specifically designed for high strain-rate experiments. Utilising open-source camera calibration and two-dimensional digital image correlation tools within the MATLAB framework, a single camera 3-D DIC system with sub-micron displacement resolution is demonstrated. The system has a displacement accuracy of up to 200 times the optical spatial resolution, matching that achievable with commercial systems. The surface strain calculations are benchmarked against commercially available software before being deployed on quasistatic tests showcasing the ability to detect both in-and out-of-plane motion. Finally, a high strain-rate (1.2×10 3 s −1 ) test was performed on a top-hat sample compressed in a split-Hopkinson pressure bar in order to highlight the inherent camera synchronisation and ability to resolve the adiabatic shear band phenomenon.

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Three-Dimensional Dynamic Deformation Measurements Using Stereoscopic Imaging and Digital Speckle Photography

Cited by 3 publications

References 0 publications

Online 3D Displacement Measurement Using Speckle Interferometer with a Single Illumination-Detection Path

Online 3D Displacement Measurement Using Speckle Interferometer with a Single Illumination-Detection Path

The use of digital speckle radiography to study the ballistic deformation of a polymer bonded sugar (an explosive simulant)

A single camera three‐dimensional digital image correlation system for the study of adiabatic shear bands

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