Topic
Digital image correlation
About: Digital image correlation is a research topic. Over the lifetime, 7842 publications have been published within this topic receiving 132166 citations.
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TL;DR: In this article, the authors applied digital image correlation (DIC) during wedge splitting test on magnesia spinel sample and compared it to pure magnesia sample so as to study the influence of spinel addition on fracture behavior.
Abstract: For refractory materials, a large strain behavior before failure is desired to improve their thermal shock resistance during their service life in industry. Their microstructure (micro-cracked) induces a non-linear mechanical behavior. The present paper aims at applying digital image correlation (DIC) during wedge splitting test on magnesia spinel sample and comparing it to pure magnesia sample so as to study the influence of spinel addition on fracture behavior. From strain measurements based on DIC, the initiation and the propagation of the macro-crack are investigated and the development of micro-cracks network in the case of magnesia spinel which is behind crack branching phenomenon is analyzed. The evolution of the fracture energy required in crack propagation is studied for each material. The experimental results highlight also their mechanical properties dependent on their microstructure.
40 citations
08 Feb 2016-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effect of microstructure on localised deformation of ductile iron was investigated using in-situ tension testing, digital image correlation (DIC) and in situ tension testing.
Abstract: This paper presents a study on micro-scale deformation and the effect of microstructure on localised deformation of ductile iron, utilizing in-situ tension testing, digital image correlation (DIC) ...
40 citations
TL;DR: In this paper, a stereo-digital image correlation (stereo-DIC) system was proposed to obtain 3D full-field vibration measurements in a frequency range up to 4 kHz even with an available frame rate of 178 fps.
40 citations
TL;DR: In this article, the authors demonstrate the use of optical patterns, produced by resonant Rayleigh scattering from gold nanorods, as markers by which local deformations can be measured using image correlation techniques.
Abstract: We demonstrate the use of optical patterns, produced by resonant Rayleigh scattering from gold nanorods, as markers by which local deformations can be measured using image correlation techniques. While the use of optical data, in this case from dark-field microscopy, to generate deformational field information (displacements and strains) is not new, the use of the light scattered from gold nanorods as the correlated pattern is new, and has the potential to enable smaller scale measurements even over large deformations. We find excellent agreement between the measured and theoretical deformation and strain fields for two sample polymers with gold nanorod markers. The gold nanorod surface can be modified to make biocompatible nanomaterials, which will be useful for examining mechanical effects in biological tissue.
40 citations
TL;DR: In this article, the residual compressive strength, stress strain behavior and surface cracking of structural polypropylene fiber-reinforced concrete subjected to temperatures up to 300°C were investigated.
Abstract: Fire ranks high among the potential risks faced by most buildings and structures. A full understanding of temperature effects on fiber reinforced concrete is still lacking. This investigation focuses on the study of the residual compressive strength, stress strain behavior and surface cracking of structural polypropylene fiber-reinforced concrete subjected to temperatures up to 300 °C. A total of 48 cubes was cast with different fiber dosages and tested under compression after exposing to different temperatures. Concrete cubes with varying macro (structural) fiber dosages were exposed to different temperatures and tested to observe the stress–strain behavior. Digital image correlation, an advanced non-contacting method was used for measuring the strain. Trends in the relative residual strengths with respect to different fiber dosages indicate an improvement up to 15 % in the ultimate compressive strengths at all exposure temperatures. The stress–strain curves show an improvement in post peak behavior with increasing fiber dosage at all exposure temperatures considered in this study.
40 citations