数字图像相关
材料科学
变形(气象学)
带通滤波器
温度测量
滤波器(信号处理)
光学
声学
红外线的
样品(材料)
数字图像
图像处理
复合材料
计算机科学
图像(数学)
计算机视觉
物理
量子力学
热力学
作者
Bing Pan,Dafang Wu,Zhaoyang Wang,Yong Xia
标识
DOI:10.1088/0957-0233/22/1/015701
摘要
A simple, easy-to-implement yet effective high-temperature digital image correlation (DIC) method is established for non-contact full-field deformation measurement at elevated temperatures. The technique employs a bandpass optical filter to eliminate the influence of black-body radiation of high-temperature objects on the intensity of captured images. With the bandpass filter, high-quality digital images of an object at high temperatures up to 1200 °C can be easily acquired and directly compared with the reference image recorded at room temperature using the DIC technique to extract full-field deformation information with high fidelity. To verify the performance of the proposed technique, a chromium-nickel austenite stainless steel sample was heated from room temperature to 1200 °C using an infrared heating device, and the surface images at various temperatures were captured using the bandpass filter imaging system. Afterwards, full-field thermal deformation and coefficient of thermal expansion of the sample were determined using the DIC technique. Experimental results indicate that the proposed high-temperature DIC method is easy to implement and can be applied to practical full-field high-temperature deformation measurement with high accuracy.
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