|제목(국문)||라운딩 펀치에 의한 프레팅 상태에서의 균열 해석|
|제목(영문)||Crack Analysis under Fretting Condition by Rounded Punch|
▷공저자 네트워크 보기
정연호 (Y.H.Jung ,한국원자력연구소 ) ▷공저자네트워크등록하기
|초록||Surface edge crack subjected to contact stresses is analysed. A punch with corner radii is considered to press the semi-infinite plane. Partial slip problem is solved when a shear force is applied to the punch. Dislocation density function method is used to solve the present mixed mode crack problem. The crack length of positive K1 is examined, which is affected by the ratio of the flat portion to the total width of the punch. Surface traction during one cycle of the shear force is evaluated to simulate the fretting condition. The compliance change of the contact surface is also investigated during the shear cycle. It is found that the crack grows during only a part of the cycle, which may be termed as effective period of crack growing. A design method for restraining the fretting failure is discussed, from which recommendable geometry of the punch is suggested.
|keyword||Rounded Punch(라운딩 펀치), Stress Intensity Factor(응력확대계수), Partial Slip(부분미끄럼), Effective Period of Crack Growing (유효 균열성장 구간), Fretting Failure(프레팅 손상).|
|저널명||대한기계학회논문집 A ▷관련저널보기|