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황재석,서재국,이효재,남정환,Hwang, Jae-Seok,Suh, Jae-Guk,Lee, Hyo-Jae,Nam, Jeong-Hwan,Rpwlands, R.E. 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.10
SPATE(Stress Pattern Analysis by Thermal Emission) can be effectively used to analyze the stress distribution of the orthotropic structure under the repeated load by non-contact. In this research, the measuring conception and method of stress intensity factor of orthotropic material using SPATE are suggested. The relationships between the maximum values of SPATE signal and $1/\sqrt{X'}$ (or $1/\sqrt{y'}$) are theoretically established in the vicinity of crack tip of the orthotropic material. It is certified through SPATE experiment that their linear quality is very excellent.