Damage Monitoring of Metal Materials by Laser Speckle Assisted by Image Processing Technique : Basic Experiment

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概要

• 論文の詳細を見る

• This paper presents a method to detect damage of metals with no contact using a laser speckle technique. This method is based on observations of the change of the laser speckle pattern depending on the surface roughness and texture change of the material caused by slip bands due to plastic deformation. The laser speckle pattern was analyzed automatically and quantitatively using an image processing system in this experiment. A new parameter, c_k, was derived to statistically express the features of the speckle pattern. It was found that this parameter can express the features of the speckle pattern accurately and has excellent reproducibility. Also, it allows an accurate measurement of plastic strain. The experiment was carried out for cases of both static tensile and fatigue loading using aluminum alloy as the material.

• 一般社団法人日本機械学会の論文
• 1991-07-15

著者

• Chiang F‐p

  State Univ. New York At Stony Brook New York Usa

• Kato Akira

  Chubu University

• Dai Yu-Zhong

  State University of New York at Stony Brook

• Chiang Fu-Pen

  State University of New York at Stony Brook

関連論文

• Damage Monitoring of Metal Materials by Laser Speckle Assisted by Image Processing Technique : Basic Experiment
• Measurement of Cyclic Stresses in High Temperature Range Using Nickel Electroplating : 2nd Report, Examination of Applicable Temperature and Accuracy of Measured Values
• The Application of Computer Image Processing to Stress Measurement by Copper Electroplating : Series A : Solid-Mechanics, Strength of Materials

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