Milad Z Aghdam, Hamidreza Asemani, Ali Shivaie Kojouri
Digital image correlation (DIC) is a powerful full-field displacement measurement technique of surfaces, which has been employed for laboratory and industrial researches. Creating an appropriate randomly speckle pattern is the first step of the DIC that has a considerable role in the accuracy of results. In the current paper, a new speckle pattern, which is considerably effortless in creation and modification, is introduced that is applicable in the study of high displacement gradients in small fields of views by the DIC technique. The new speckle pattern is created by spreading a coating of graphene oxide nanoparticles on the specimen surface. In this study, after the introduction of the new method, the accuracy of DIC results through the new pattern is investigated under translation, rotation, and tensile tests. Obtained results showed that the technique is useful and can decline the trouble of the creation and modification of a speckle pattern on a small field of view, particularly in industrial applications.
Digital Image Correlation, Speckle Pattern, Nanoparticle Spreading, Coatings
Cite this paper
Milad Z Aghdam, Hamidreza Asemani, Ali Shivaie Kojouri. (2022) A Novel Method for Creating Speckle Pattern in Digital Image Correlation Based on Nanoparticles Coating, Appropriate for Study Intense Gradient of Displacement in Small Zones. International Journal of Signal Processing, 7, 74-85