Measurement of Stress Intensity Factors for Some Common Fillet Welded Joints in Steel Structures by Digital Image Correlation Method

• Main Authors: Li-Ting Huang, 黃莉婷
• Other Authors: Hsin-yang Chung
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/00158928147365393023

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 97 === This thesis experimentally determined the opening mode (mode I) and shearing mode (mode II) stress intensity factors (KI and KII) for some common fillet welded joints, including load-carrying fillet welded cruciform joints and fillet welded lap joints, in steel structures by Digital Image Correlation Method and Least-Squares Method. A total of fifteen load-carrying fillet welded cruciform joint specimens, three fillet welded single lap joint specimens and five fillet welded double lap joint specimens were studied in this research, and all the specimens were tested and analyzed by the optimal digital image parameters obtained from the parameter study. The SIF results of the specimens determined by Digital Image Correlation Method and Least-Squares Method were as precise as the results from the finite element analyses or the formula provided in the British Standards BS7910. In addition, this research also found that Digital Image Correlation Method can provide more precise measurement results than Symbol Dot Method.