By Shanglei Li, Anish Poudel (auth.), Helena Jin, Cesar Sciammarella, Sanichiro Yoshida, Luciano Lamberti (eds.)
Advancement of Optical tools in Experimental Mechanics: Proceedings of the 2013 Annual convention on Experimental and utilized Mechanics, the 3rd quantity of 8 from the convention, brings jointly contributions to this significant region of analysis and engineering. the gathering provides early findings and case stories on a variety of optical equipment starting from conventional photoelasticity and interferometry to more moderen DIC and DVC strategies, and contains papers within the following common technical examine components:
Optical metrology and displacement measurements at various scales
Digital holography and experimental mechanics
Optical dimension structures utilizing polarized mild
Digital photo correlation
Optical tools for MEMS and NEMS
Three-dimensional imaging and volumetric correlation
Imaging tools for thermomechanics applications
3D volumetric movement dimension
Optical residual pressure size techniques
Advances in imaging technologies
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Additional resources for Advancement of Optical Methods in Experimental Mechanics, Volume 3: Conference Proceedings of the Society for Experimental Mechanics Series
Strang G (2006) Linear algebra and its applications. Cengage Learning 11. Grama SN, Subramanian SJ (2012) Computation of full-field strains using principal components analysis. Manuscript under review. 12. Timoshenko SP, Goodier JN (2010) Theory of elasticity. A. Sciammarella, L. M. Sciammarella, and A.
The synthetic images are finally obtained by pixel under-sampling of the corresponding HR images. The super/undersampling procedure is rather time consuming but allows to generate accurate synthetic images starting from real acquired images of the speckle pattern. Synthetic noise can be added to the syntactic image using a Gaussian random noise function where the standard deviation is the one measured during the experiments. 3 Experiments The experiments consisted in a series of tensile tests performed with an electromechanical tensile machine (Zwick®Z050 model).
The obtained standard deviations are rather small both for displacement and strain fields, similar results are also obtained in other papers . The simulator correctly reproduces the experiments. An increase of the strain standard deviation is obtained in the translated specimen. It is interesting noting that this effect is reproduced by the simulator, although the amount of noise input in the images is the same used for the fixed test. An example of experimental and simulated measured strain fields are shown in Fig.