서지주요정보
탄성체 내의 킹크균열과 계면밑균열 해석 = Analysis of a kink crack and a subinterface crack in an elastic solid
서명 / 저자 탄성체 내의 킹크균열과 계면밑균열 해석 = Analysis of a kink crack and a subinterface crack in an elastic solid / 최승용.
저자명 최승용 ; Choi, Seung-Yong
발행사항 [대전 : 한국과학기술원, 1997].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8007158

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 97011

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

This study deals with two kinds of crack problems; one is a kinked interfacial crack problem, and the other is a subinterface crack problem. A new conservation integral consisting of the path and area integral, for an arbitrarily kinked interfacial crack is proposed. The new conservation integral is shown to have the physical meaning of the energy release rate. With the help of a weighting function the domain representation associated with the energy release rate is obtained, which is amenable to the finite element computation. Two numerical examples are presented to verify its usefulness; one is the problem of an interfacial crack with a parabolic-curved kink, and the other is the problem of a circular arc-shaped interfacial crack with a straight kink. Applying the present method, the energy release rate at the onset of crack kinking can be obtained easily by assuming the small kink length, while in some cases such as the crack kinking out of the curved interfaces, it seems to depend strongly on the modelling length of the kink crack. This may be brought to attention when we treat the kink cracks out of the curvilinear cracks. A new and simple alternating technique for solving subinterface crack problems is proposed. The present method only requires a corresponding solution for an infinite homogeneous medium, so it simplifies the bimaterial problem significantly and therefore, it has the potential applicability when the problem is quite complicated such as the interaction between the curved subinterface crack and the interface in anisotropic bimaterial. A subinterface crack loaded by an antiplane shear or inplane tension is examined to verify the usefulness of the present method. Although the number of the iteration required to get the converged solutions depends on the distance between the interface and the subinterface crack, it usually takes less than 4 steps except for the subinterface crack very close to the interface. The results obtained by the present method are in good agreement with the existing solutions over the wide range of the crack depth.

서지기타정보

서지기타정보
청구기호 {DME 97011
형태사항 viii, 67 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, 식(2.9b) 의 결과
저자명의 영문표기 : Seung-Yong Choi
지도교수의 한글표기 : 엄윤용
지도교수의 영문표기 : Youn-Young Earmme
수록잡지명 : "A new conservation integral for an arbitrarilu kinked interfacial crack" - International Jurnal of Fracture (1996)
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 35-49
주제 보존적분
킹크균열
곡선균열
계면밑균열
Conservation integral
Kink crack
Curved crack
Subinterface crack
QR CODE qr code