EXPERIMENTAL RESEARCH ON THE DETECTING OF COLUMNAR DEFECTS IN ALUMINUM ALLOY BASED ON ESPI
In recent years, the rapid development of aeronautics and astronauticsincreases the need of aluminum alloy material. In engineering practice, due to a variety of inevitable reasons, the point corrosion in the aluminum alloy would beproduced, which reduces the structural fatigue property. Thus, it is necessary to find a proper method to find defects and measure the location and size of them accurately. According to the location and size of defects, the fatigue property of structural is estimated, which is the criteria to decide whether it is necessary to modify the configuration. Electronic speckle pattern interferometer (ESPI) is a kind of the technology to measure the slight deformation, with the characters of full-scale, non-contact, and high sensitivity. This study applies ESPI to measure the surface deformation of aluminum materials with inner columnar defects under the different types of loads, and the depth and bottom diameter of the columnar are solved based on experimental results combined with the theoretical method. The experimental results are close to the true value of the defects and the error is within a certain range. This experiment provides a method to detect the columnar defects within aluminum materials.
ESPI defect detect aluminum alloy
Fan Ni Guo-biao Yang Bin Li Qi-rong Zhu
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092 China The Paradigm Center of Mechanics Laboratory of Ministry of Education, Tongji University, Shanghai 20
国际会议
广州
英文
185-188
2010-12-17（万方平台首次上网日期，不代表论文的发表时间）