#  서지주요정보
간접 경계적분식과 가중함수를 이용한 응력강도계수의 계산 = Calculation of the stress intensity factors using indirect boundary integral equation and weight fuction
서명 / 저자 간접 경계적분식과 가중함수를 이용한 응력강도계수의 계산 = Calculation of the stress intensity factors using indirect boundary integral equation and weight fuction / 이형연.
발행사항 [대전 : 한국과학기술원, 1995].
Online Access 원문보기 원문인쇄

등록번호

8005498

소장위치/청구기호

학술문화관(문화관) 보존서고

DAE 95006

도서상태

이용가능(대출불가)

반납예정일

#### 초록정보

A new weight function approach to determine the stress intensity factor(SIF) using indirect boundary integral equation has been presented. The crack surface displacement field was approximated using a single-layer potential in the indirect boundary integral equation method for the displacement based weight function approach. The single-layer potential for the crack surface displacement was represented by one boundary integral term whose kernel was modified from Kelvin's fundamental solution. A closed-form stress intensity factor solution was derived analytically. The proposed method enables the calculation of the SIF using only one SIF solution without any modification for the various crack geometries symmetric in two-dimensional plane such as a center crack in a plate with or without an internal hole, double edge cracks, and circumferential crack or radial cracks in a pipe. The application procedure to those variety of crack geometries is very simple and straightforward with the closed-form solution, where hand calculation of the SIF is possible. In most cases, a linear approximation with two reference load cases for the determination of the SIF showed good results. To improve the solution behavior, a quadratic approximation with three reference load cases was also applied to the crack geometries with internal hole such as radial and circumferential cracks in a hollow cylinder. However, the linear approximation of the SIFs with two reference SIFs showed reasonable accuracies in most cases. The analysis results using several examples verified that the present closed-form solutions were in good agreement with those of the literature and applicable to various crack geometries.

#### 서지기타정보

청구기호 {DAE 95006 xiv, 137 p. : 삽화 ; 26 cm 한국어 부록 수록 저자명의 영문표기 : Hyeong-Yeon Lee 지도교수의 한글표기 : 홍창선 지도교수의 영문표기 : Chang-Sun Hong 학위논문(박사) - 한국과학기술원 : 항공우주공학과, 참고문헌 : p. 76-83 Stress concentration. Fracture mechanics. Mathematical models. Nonlinear mechanics. 응력 집중 계수. --과학기술용어시소러스 경계 적분 방정식. --과학기술용어시소러스 표면 균열. --과학기술용어시소러스 모델링. --과학기술용어시소러스 가중 함수. --과학기술용어시소러스 Boundary value problems.
QR CODE 전체보기

전체보기