DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Im, Se-Young | - |
dc.contributor.advisor | 임세영 | - |
dc.contributor.author | Lee, Yong-Woo | - |
dc.contributor.author | 이용우 | - |
dc.date.accessioned | 2011-12-14T05:20:14Z | - |
dc.date.available | 2011-12-14T05:20:14Z | - |
dc.date.issued | 2002 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=177258&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/43157 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 기계공학전공, 2002.8, [ xiv, [128] p. ] | - |
dc.description.abstract | The determination of the stress intensity as well as the stress singularities of wedge vertices has been a major subject in fracture mechanics community. In two-dimensional wedges, the stress singularities and their stress intensities can be computed accurately with the complex potentials. On the other hand in three-dimensional wedges, most works did not look into the near-tip stress intensities of the singular stress field, but concentrated on calculating only the stress singularities at the intersection of a crack front with a free surface and at various three-dimensional wedge vertices. Only a few studies have tried to compute the stress intensities as well as the stress singularities. This is partly because three-dimensional problems are in itself very complicated and partly because any reliable methodology to compute stress intensities or a fracture parameter like the J-integral for three-dimensional cracks was not available. In the present work we examine the stress state around the vertices of two- and three-dimensional wedges. Moreover, for the first time a general and systematic computational methodology is proposed for computing the singular stress states near two- and three-dimensional wedge vertices with the aid of the two-state M-integral and the eigenfunction expansion. To compute the stress intensity near a wedge vertex, we employ the path or surface independence of the two-state M-integral, and the auxiliary solution. The auxiliary solution is obtained from the complementary eigenvalue, which is also the eigenvalue of the problem under consideration and satisfies the complementarity relationship in the M-integral sense. The existence of the complementary eigenvalue in the M-integral sense, which comprises the key to success of the present computational scheme together with the path or surface independence of the two-state M-integral, is verified numerically for three-dimensional generic wedges. The complementarity relationship of the eigenvalue... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | 3-D wedges | - |
dc.subject | complemenarity relationship of eigenvalues | - |
dc.subject | two-state M-integral | - |
dc.subject | singular boundary layers | - |
dc.subject | 특이경계층 | - |
dc.subject | 3차원 쐐기 | - |
dc.subject | 보완적인 고유치 관계 | - |
dc.subject | 두 상태 M-적분 | - |
dc.title | Applications of the two-state conservation integrals for analyzing wedge-type singular boundary layers | - |
dc.title.alternative | 쐐기 타입 특이경계층 해석을 위한 두 상태 보존적분의 응용 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 177258/325007 | - |
dc.description.department | 한국과학기술원 : 기계공학전공, | - |
dc.identifier.uid | 000965293 | - |
dc.contributor.localauthor | Im, Se-Young | - |
dc.contributor.localauthor | 임세영 | - |
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