발간논문

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Vol.46, No.6, 345 ~ 351, 2008
Title
Experimental Behaviors of Constraint Effect A2 depending on Opening Displacement Measurement near Crack Front for SS400
한민수 Min Su Han , 장석기 Seok Ki Jang
Abstract
The magnitude of constraint effect A2 value was experimentally estimated by using crack tip opening displacement(CTOD) between elastic and plastic regions near crack tip front for CT specimen with 25.4tᒠSS400 steel. The constraint effect, A2 was dependent on specimen configuration and on the measured positions of CTOD near crack front. A2 should be estimated using the opening displacement calculated within crack front plastic region. If not, it`s not reliable to evaluate of constraint effect at crack growth initiation in this paper.
Key Words
CTOD, crack tip opening displacement, constraint effect A2 value, δ 5 method
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