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초록·키워드 목차

In order to perform elastic-plastic fracture mechanical analyses, fracture resistance curves for concerned materials are required. The standard CT specimen was used to obtain fracture resistance curves. But the fracture resistance curve by the standard CT specimen was very conservative to evaluate the integrity of the structure. And fracture resistance curve was affected by the specimen geometry and crack plane orientation. The objective of this paper is to be certain the conservativeness of the fracture resistance curve by the standard CT specimen and to provide the additional safety margin. For these, the fracture tests using the real pipe specimen and standard CT specimen test were performed. 4-point bending jig was manufactured for the pipe test and the direct current potential drop method was used to measure the crack extension and the length for the pipe test. From the result of the pipe and the standard CT specimen test, it was observed that the fracture resistance curve of the standard CT specimen test was conservative compare to that of the pipe specimen test.

Abstract

1. 서론

2. 시험 장비 및 시험편

3. 균열 길이 측정

4. 파괴 저항 시험

5. 결론

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