A study of the notch and frequency effects on fatigue life at high temperature is carried out using notched and unnotched plate specimens of SS 304 under stress-controlled testing conditions. Analysis of the results obtained at 600°C under fatigue and creep-fatigue conditions allowed the generalization of the relation proposed in an earlier study. Examinations of the experimental data with hold-time testing suggested that in these conditions, the frequency effect should be incorporated in the relationship. Results obtained from the modified relation are in agreement with the experimental data, within a factor of two. Finite element analysis was carried out to determine the state of stresses and strains at the notch root by simulating four creep-fatigue cycles. The computed results indicated that, under zero-to-tension cyclic loading with controlled nominal stress, the maximum local stress at the notch root relaxes; this results in a minimum local stress in compression, and as a consequence, the mean local stress is significantly reduced. The stress relaxation as well as the creep strain accumulation were found to occur only in the vicinity of the notch (within 0.75 mm). The numerical results concerning the local stress relaxation and the time-dependent strain accumulation are used to explain the notch-strengthening effect on life observed in the present study. [S0094-9930(00)00401-7]
Skip Nav Destination
Article navigation
February 2000
Technical Papers
Notch-Strengthening Phenomenon Under Creep-Fatigue Loading Conditions
N. Merah, Assistant Professor,
N. Merah, Assistant Professor,
Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, P.O. Box 1758, Dhahran 31261, Saudi Arabia
Search for other works by this author on:
N. Merah, Assistant Professor,
Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, P.O. Box 1758, Dhahran 31261, Saudi Arabia
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division, October 19, 1998; revised manuscript received October 11, 1999. Associate Technical Editor: R. Swindeman.
J. Pressure Vessel Technol. Feb 2000, 122(1): 15-21 (7 pages)
Published Online: October 11, 1999
Article history
Received:
October 19, 1998
Revised:
October 11, 1999
Citation
Merah , N. (October 11, 1999). "Notch-Strengthening Phenomenon Under Creep-Fatigue Loading Conditions ." ASME. J. Pressure Vessel Technol. February 2000; 122(1): 15–21. https://doi.org/10.1115/1.556140
Download citation file:
Get Email Alerts
Cited By
Dynamic Behavior of Rectangular Tanks With Limited Freeboard Under Seismic Loads: Experimental, Analytical, and Machine Learning Investigations
J. Pressure Vessel Technol (April 2025)
Development of Local Ductile Failure Assessment Method and Its Application to Four Alloys—Part II: Incorporation of the Effect of Lode Angle
J. Pressure Vessel Technol (April 2025)
Related Articles
A 3D Finite Element Study of Fatigue Life Dispersion in Rolling Line Contacts
J. Tribol (October,2011)
Thermomechanical Fatigue Behavior of a Directionally Solidified Ni-Base Superalloy
J. Eng. Mater. Technol (July,2005)
Validation of a General Fatigue Life Prediction Methodology for Sn–Ag–Cu Lead-Free Solder Alloy Interconnects
J. Electron. Packag (March,2008)
Fatigue of Chip Scale Package Interconnects Due to Cyclic Bending
J. Electron. Packag (September,2001)
Related Proceedings Papers
Related Chapters
Fatigue Analysis in the Connecting Rod of MF285 Tractor by Finite Element Method
International Conference on Advanced Computer Theory and Engineering, 4th (ICACTE 2011)
Start-Up, Shutdown, and Lay-Up
Consensus on Pre-Commissioning Stages for Cogeneration and Combined Cycle Power Plants
Creep-Fatigue Behavior in High Strength Copper Alloys
Effects of Radiation on Materials: 22nd Symposium