FINITE ELEMENT ANALYSIS OF CLOSURE BEHAVIOUR OF FATIGUE CRACKS IN RESIDUAL STRESS FIELDS

Fatigue and Fracture of Engineering Materials and Structures - Tập 18 Số 1 - Trang 105-117 - 1995
Hyeon-Gyu Choi1, Jung Han Song2
1Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Seoul, Korea
2Department of Automation and Design Engineering, Korea Advanced Institute of Science and Technology, Seoul, Korea

Tóm tắt

AbstractAn elastic‐plastic finite element analysis with high order elements is performed to examine closure behaviour of fatigue. cracks in residua1 stress fieids and the numerical results are then compared with experimental results. The finite element analysis, performed under plane stress using 8‐node isoparametric elements, can predict fatigue crack closure behaviour through residual stress fields very well. The crack opening and closing behaviour through a compressive residual stress field is found to be complicated and influenced by the applied load magnitude and the location of the crack tip. Three different types of crack opening behaviour, namely, normal, unsymmetric partial and symmetric partial crack opening behaviour are observed through a compressive residual stress field. The partial crack opening stress intensity factor including the partial crack opening effect is recommended for the prediction of fatigue crack growth through a compressive residual stress field.

Từ khóa


Tài liệu tham khảo

G.Glinka(1979)Effect of residual stresses on fatigue crack growth in steel weldments under constant and variable amplitude load.Fract. Mech. ASTM STP 677 pp.198–214.

W.Elber(1971)The effects of residual stresses on the propagation of fatigue crack closure.Damage Tolerance in Aircraft Structure ASTM STP 743 pp.230–242.

10.2207/qjjws.5.269

10.1111/j.1460-2695.1989.tb00545.x

10.1111/j.1460-2695.1990.tb00572.x

Kikukawa M., 1976, Fatigue crack closure behaviour at low stress intensity levels, Proc. ICM, 2, 254

10.2472/jsms.29.1240

10.2207/qjjws.5.272

10.1016/0013-7944(89)90027-1

10.1016/0013-7944(89)90028-3

Owen D. R. J., 1983, Engineering Fracture Mechanics: Numerical Method and Application

10.2207/qjjws.5.119

10.1007/BF00955089

10.1007/BF00155268

10.1016/0013-7944(75)90046-6

Lalor P., 1986, The Behavior of Short Fatigue Cracks EGF1, 369

10.1520/STP33952S

Ogura K., 1977, FEM analysis of crack closure and delay effect in fatigue crack growth under variable amplitude loading., Engng Fract. Mech, 7, 457

Thông tin
Thông tin xuất bản

Fatigue and Fracture of Engineering Materials and Structures

Tập 18 Số 1

105-117

Thông tin tác giả