Abstract
Moire interferometry is a recent optical technique, which combines the concepts and techniques of geometrical moire and optical interferometry and enables ful-field measurements with high sensitivity. Using this technique, elasto-plastic strains were measured around a central circular hole in an aluminum plate subjected to uniaxial tension. Incremental load was applied and in-plane displacement fields were recorded at each load step. Elasto-plastic stresses were determined using incremental flow theory for strain hardening case and the elasto-plastic strain and stress destribution were plotted. A numerical solution for this problem was also obtained. Reliability of the measurements was ensured from the verification of equilibrium condition and close comparison of experimental values with numerical results.
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References
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K. Ravisankar, “Development of Experimental Techniques and Capability to Analyse Elasto-plastic Problems”, Ph.D Thesis, Anna University, India, (1996).
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Ravisankar, K., Ifju, P.G., Narayanan, R. et al. Evaluation of Elasto-Plastic Stresses on a Strain Hardening Material Using Moire Interferometry. J Opt 29, 35–47 (2000). https://doi.org/10.1007/BF03354670
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DOI: https://doi.org/10.1007/BF03354670