Low Cycle Fatigue and Crack Initiation Prediction at the Root of a Notch
GABRA, M., RABIE, G., IBRAHIM, M. (1986). Low Cycle Fatigue and Crack Initiation Prediction at the Root of a Notch. EKB Journal Management System, 1(2nd Conference on Applied Mechanical Engineering.), 67-78. doi: 10.21608/amme.1986.51856
M. GABRA; G. RABIE; M. F.E. IBRAHIM. "Low Cycle Fatigue and Crack Initiation Prediction at the Root of a Notch". EKB Journal Management System, 1, 2nd Conference on Applied Mechanical Engineering., 1986, 67-78. doi: 10.21608/amme.1986.51856
GABRA, M., RABIE, G., IBRAHIM, M. (1986). 'Low Cycle Fatigue and Crack Initiation Prediction at the Root of a Notch', EKB Journal Management System, 1(2nd Conference on Applied Mechanical Engineering.), pp. 67-78. doi: 10.21608/amme.1986.51856
GABRA, M., RABIE, G., IBRAHIM, M. Low Cycle Fatigue and Crack Initiation Prediction at the Root of a Notch. EKB Journal Management System, 1986; 1(2nd Conference on Applied Mechanical Engineering.): 67-78. doi: 10.21608/amme.1986.51856

Low Cycle Fatigue and Crack Initiation Prediction at the Root of a Notch

The International Conference on Applied Mechanics and Mechanical Engineering
Article 28, Volume 1, 2nd Conference on Applied Mechanical Engineering., May 1986, Page 67-78  XML PDF (3.83 MB)
Document Type: Original Article
DOI: 10.21608/amme.1986.51856
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Authors
M. GABRA1; G. RABIE1; M. F.E. IBRAHIM2
1Lecturers,Dept. of Aeronautical Engineering,Military Technical College,CAIRO.
2Lecturer,Dept. of Machine Design,Military Technical College,CAIRO.
Abstract
Conventional fracture mechanics have made it possible to quantify the slow propagation of a crack subjected to cyclic loadings,as well as the fracture phase. Unfortunately,it is still impossible to quantify seperately the initiation phasc of a crack. Fatigue crack initiation was investigated by testing 2124T351 Aluminum alloy with 12 mm thick ASTM compact tension specimens having various notch-root radii between 0.1 and 10 mm . Crack initiation was detected by electric potential method. In order to calculate the number of cycles required to initiate a crack,notch root behavior was investigated through two main approaches: Elastic and Elastoplastic analy-sis of stress concentration under fatigue.
The effect of confined plasticity at the notch root was analysed. Consideration of this plasticity would ameliorate to a great extent the crack initiation analysis and prediction.
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