In situ measurement of metal-as-insulation (MI) high temperature superconductor (HTS) pancake deformation gives insight to its actual mechanical state. Measurement hoop strain for inner / outer turn MI is usually made by gauges. This however local and faces electromagnetic compatibility (EMC) thermal issues. Non-contact full-field displacement an interesting alternative solution. technique base...

This paper presents a study on cracking characterization of engineered cementitious composites (ECC) under flexural cyclic load using digital image correlation (DIC) technique. Five stress levels, namely 0.65, 0.75, 0.8, 0.85 and 0.9 the strength, were applied. Strain map at side surface was obtained by DIC used to drive evolution midspan deflection, damage pattern, maximum crack width, number ...

With the advent of camera-based full-field measurement techniques such as digital image correlation (DIC), researchers have been trying to exploit rich data sets through use more complex test configurations than standard ones (uniaxial tension/compression, bending etc.). This new paradigm in mechanical testing materials has recently christened ‘Material Testing 2.0’. paper provides a brief over...

We observed with optical and scanning electron microscopy halite samples during uniaxial compression. Surface displacement fields were retrieved from digital images taken at different loading stages thanks to digital image correlation (DIC) techniques, on the basis of which we could 1) compute global and local strain fields, 2) identify two co-operational deformation mechanisms. The latter were...

Differential interference contrast (DIC) is frequently used in conventional 2D biological microscopy. Our recent investigations into producing a 3D DIC microscope (in both conventional and confocal modes) have uncovered a fundamental difficulty: namely that the phase gradient images of DIC microscopy cannot be visualized using standard digital image processing and reconstruction techniques, as ...

The advent of small-scale testing procedures coupled with scanning electron microscopy (SEM) imaging allow for high-resolution digital image correlation (DIC) studies to examine strain localization at the grain size length scale. A systematic study was performed to determine how speckle patterning parameters (speckle density and shape) affect strain resolution of DIC using SEM imaging. Strain r...

An experimental investigation was conducted to evaluate the dynamic performance of E-glass Vinyl Ester composite face sheet / foam core sandwich panels when subjected to pre-compression and subsequent blast loading. The sandwich panels were subjected to 0 kN, 15 kN and 25 kN of in plane compression respectively, prior to transverse blast wave loading with peak incident pressure of 1 MPa and vel...

The aim of this work is to present an efficient procedure for growing large metallic single crystals that associates a classical growth technique (namely, the critical strain-annealing—CSA—method) with advanced methods accurate full-field strain measurements based on digital image correlation (DIC) and sample geometry design using finite element analysis. Measuring plastic strains accuracy bett...

The use of laminated bamboo in structural applications is increasing, but the failure mechanisms material need further investigation. This study investigated under compressive loading using digital image correlation (DIC). Notably, unique speckled appearance a transverse section, resulting from spatial distribution vascular fibre bundles parenchyma matrix, was directly used for DIC; no sample p...