Measurement of Y‐notch tip plastic zone by the laser speckle technique
Source abstract
Abstract
Abstract This paper presents a laser speckle method for the measurement of plastic zone ahead of a Y‐notch tip on metallic specimens. The method employs an unexpanded laser beam to illuminate the test object. Diffracted images are captured on a ground glass and recorded using a CCD camera. The recorded images were digitised and subsequently analysed on a personal computer. The plastic strain at the notch tip was correlated with its corresponding speckle image using a recently proposed parameter known as the integrated peak spectral intensity coefficient. Specimens containing Y‐notches of various angles were tested and the resu Its compared well with that predicted by theory.
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Research context
OpenAlex topics: Optical measurement and interference techniques · Surface Roughness and Optical Measurements · Industrial Vision Systems and Defect Detection
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References (15)
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