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허용학(Yong-Hak Huh),R.E Edwards,M.W. Brown,E.R. de los Rios 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.3
Governing parameters on location of crack Initiation and direction of crack initiation were investigated by performing fretting fatigue tests and analysis on Al 2024-T351. Fatigue tests were carried out using biaxial fatigue machine. It was shown that the dominant fatigue crack tended to initiate at the outer edge of one of the four bridge pads, growing at an angle beneath a pad, before turing perpendicular to the orientation of the axial load. Distribution of stresses generated during fretting fatigue loading along the interface was calculated by elastic FE simulation. It can be known that the location of crack initiation can be predicted by using the maximum tangential stress range or the maximum shear stress range. Futhermore, the crack initiation direction can be predicted by a maximum tangential stress range.