论文信息 - AN ENGINEERING ASSESSMENT OF FATIGUE CRACK GROWTH OF IRREGULARLY ORIENTED MULTIPLE CRACKS

AN ENGINEERING ASSESSMENT OF FATIGUE CRACK GROWTH OF IRREGULARLY ORIENTED MULTIPLE CRACKS

— Knowledge of the behaviour of interacting and irregularly oriented multiple cracks is very limited. The recharacterisation rules for such cracks are usually empirical. In order to provide more reasonable rules for an engineering assessment of fatigue growth of irregularly oriented multiple cracks, this paper first studies the mechanics of fatigue growth of two-dimensional non-coplanar cracks. Uniaxial and biaxial fatigue testing on specimens with various multiple cracks are then carried out. Possible errors in the assessment of the cracks using the current rules are discussed. An improved procedure for the fatigue life assessment is developed.

S.-T. Tu | S.-H. Dai

[1] James C. Newman,et al. Stress-intensity factors for a wide range of semi-elliptical surface cracks in finite-thickness plates , 1979 .

[2] D. Barr,et al. Thermoelastic fracture solutions using distributions of singular influence functions—I: Determining crack stress fields from dislocation distributions , 1983 .

[3] Makoto Isida,et al. Analysis of Stress Intensity Factors for Plates Containing Random Array of Cracks , 1970 .

[4] Wole Soboyejo,et al. A numerical investigation of the interaction and coalescence of twin coplanar semi-elliptical fatigue cracks , 1989 .

[5] Satya N. Atluri,et al. Multiple surface cracks in pressure vessels , 1984 .

[6] B R Twaddle,et al. THE DEVELOPMENT OF CRACKS BY DEFECT COALESCENCE , 1988 .

[7] P. Theocaris,et al. An alternating coupling of finite elements and singular integral equations for the solution of branched cracks in finite sheets , 1984 .

[8] S. Tu,et al. The Fatigue Growth of Inclined Surface Cracks Under Biaxial Loading , 1990 .

[9] Katsuyuki Shibata,et al. Fatigue and fracture behavior of straight pipe with flaws in inner surface , 1981 .

[10] Wo Soboyejo. On the Prediction of the Fatigue Propagation of Semi-Elliptical Defects , 1992 .

[11] D. Broek. The practical use of fracture mechanics , 1988 .