Experimental Method to Enhance Sensitivity and Accuracy of Measurements in Measuring Fracture Parameters around the Crack Tip Using Compact Hololens Imaging System
Source abstract
Abstract
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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OpenAlex topics: Optical measurement and interference techniques · Ultrasonics and Acoustic Wave Propagation · Non-Destructive Testing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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