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Experimental Method to Enhance Sensitivity and Accuracy of Measurements in Measuring Fracture Parameters around the Crack Tip Using Compact Hololens Imaging System

  • OPTICAL METHODS
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Abstract

In the present communication, a detailed investigation has been made to realize a compact four hololens imaging system for the precision measurement of fracture parameters. The crack tip opening displacements (CTODs) were calculated using measured crack mouth opening displacement (CMOD) and crack opening displacement (COD) to determine all the important fracture parameters. It has been demonstrated that the effect of the zero-order diffraction halo can be avoided by measuring the CMOD and CTOD in the first-order diffraction halo to obtain better results. Experiments were conducted on an aluminium (Al) beam specimen with a central edge crack subjected to three-point bending under different loading conditions. The experimental and theoretical results are found to be in good agreement. The investigation presented in the paper strongly supports the argument that the sensitivity and accuracy of measurements in speckle metrology can be significantly enhanced using low-cost holographic optics.

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This work was supported by regular institutional funding, and no additional grants were obtained.

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Authors and Affiliations

  1. National Institute of Technology Jamshedpur, Jamshedpur, India

    Arasad Ali Khan, H. L. Yadav & R. K. Jaiswal

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  1. Arasad Ali Khan
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  2. H. L. Yadav
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  3. R. K. Jaiswal
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Correspondence to Arasad Ali Khan or H. L. Yadav.

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Khan, A.A., Yadav, H.L. & Jaiswal, R.K. Experimental Method to Enhance Sensitivity and Accuracy of Measurements in Measuring Fracture Parameters around the Crack Tip Using Compact Hololens Imaging System. Russ J Nondestruct Test 59, 501–506 (2023). https://doi.org/10.1134/S1061830922600794

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