CAJ | 학술논문

裂纹尖端张开角（CTOA）已被应用于高韧性管线钢的止裂韧性评定。简要介绍了裂纹尖端张开角CTOA的定义，详细介绍了目前使用较广的4种CTOA测试方法，即稳态撕裂时直接测量法（光学显微和数值图像相关方法）、试验后测量（显微形貌法）、有限元法和通过δ5间接测量法，并对这几种方法的适用性及存在的问题进行了探讨，为CTOA测试方法的推广应用及今后进一步的丰富与完善打下了基础。
렬문첨단장개각（CTOA）이피응용우고인성관선강적지렬인성평정。간요개소료렬문첨단장개각CTOA적정의，상세개소료목전사용교엄적4충CTOA측시방법，즉은태시렬시직접측량법（광학현미화수치도상상관방법）、시험후측량（현미형모법）、유한원법화통과δ5간접측량법，병대저궤충방법적괄용성급존재적문제진행료탐토，위CTOA측시방법적추엄응용급금후진일보적봉부여완선타하료기출。
The crack tip opening angle(CTOA) has already been used for toughness arrest assessment in high toughness pipeline steel. In this paper,it briefly introduced the definition of CTOA,detailedly introduced four CTOA test methods commonly used at present,including the direct measurement method when steady-state tear(optical microscopic and numerical image correlation method),measurement after test(microscopic morphology method),finite element method and indirect method of measurement th-roughδ5. It also discussed the applicability and the existed problems,which lay the foundation for popularization and application and improvement of the CTOA measurement method.