数位影像相关系数法於非均质材料应变分析及裂缝观测之应用.PDFVIP

The 8th National Conference on Structure Engineering Sun Moon Lake, Taiwan, R. O. C., 1-3 Sept. 2006 Paper No. M-008 數數 料裂 Application of Digital Image Correlation Method for Strain analysis and Crack Observation of Non-homogeneous Materials 1* 2 3 4 1 祥 1 立 2 立 益 3 立 4 立料 數數 精度數 量 料 裂裂 裂 易 (AE) 裂 度 裂度 不數 裂行裂數 數 不連 裂理 異 ( 裂) 數 來 裂 不量 裂 von Mises 裂精度 裂了 錄 裂更易 略 裂裂 力 裂 :數數 料 裂 Abstract The detection of crack development in masonry wall is an important task for investigating the earthquake resistant capability of masonry structures. Traditionally, the work is done by manual observation and documenting, which are inaccurate and time-consuming. The present study attempted utilizing the digital image correlation (DIC) technique to identify the crack development. The DIC is a new developed non-contact-type measurement technique. The advantage of this technique is that the whole displacement and strain field can be analyzed and the sample will not be disturbed. It compares two photos of specimens without and under loading respectively. By optimizing the correlation coefficient of the two images, the optimal parameters of the displacement filed are identified. The strain field is then obtained. Subsequently, the crack can be found out by identifying the significant variation of strain and/or dis