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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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This paper aims to synthesize the research on fatigue fracture mechanisms of high strength aluminum alloys which are widely used in motorcars or airplanes to prevent accidents.
To measure the data of crack opening ratio, the same materials and methods are used for evaluating the fatigue crack propagation rate as an effective stress intensity factor. But, many researchers have brought different results.
An exact crack opening ratio was, therefore, proposed for getting a more accurate fatigue crack propa gation rate.
The main. conclusions obtained are as follows.
(1) As a result of the fatigue test, the value of the crack opening ratio is the same regardless of the stress ratio.
(2) The value of crack opening ratio is different according to the measuring point.
After measuring the crack propagation rate by using an effective stress intensity factor, the crack opening ratio value measured at the crack mouth by a clip gage, or measured rear of the specimen by a strain gage is more accurate than that by any other measuring test.
To measure the data of crack opening ratio, the same materials and methods are used for evaluating the fatigue crack propagation rate as an effective stress intensity factor. But, many researchers have brought different results.
An exact crack opening ratio was, therefore, proposed for getting a more accurate fatigue crack propa gation rate.
The main. conclusions obtained are as follows.
(1) As a result of the fatigue test, the value of the crack opening ratio is the same regardless of the stress ratio.
(2) The value of crack opening ratio is different according to the measuring point.
After measuring the crack propagation rate by using an effective stress intensity factor, the crack opening ratio value measured at the crack mouth by a clip gage, or measured rear of the specimen by a strain gage is more accurate than that by any other measuring test.
목차
ABSTRACT
1.서론
2.시험편 및 실험방법
3.실험결과 및 고찰
4.결론
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