Affiliation:
1. Lehigh University, Bethlehem, PA 18015-3085
2. Virginia Polytechnic Institute and State University, Blacksburg, VA
Abstract
The paper investigates the current rules for fatigue analysis on plastic basis of the ASME Boiler and Pressure Vessel Code. It addresses the question: When these rules are used for a vessel or component, is it designed with respect to crack initiation or failure? Using available fatigue test data, the question is answered for blunt double-notch plate specimens made of AISI 4340 steel. When the rules are applied to these specimens, it is found that they are designed with respect to the initiation of a crack of a certain length that decreases as the strain range increases. The plate specimens are not designed with respect to failure. It is concluded that for geometries that exhibit a strain range gradient away from the surface, the number of cycles allowed by the current rules includes the initiation phase but not the propagation phase of a fatigue crack. If this result is unsatisfactory, new rules have to be written.
Subject
Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality
Reference16 articles.
1. ASME Boiler and Pressure Vessel Code, 2001, ASME, New York.
2. Langer, B. F.
, 1962, “Design of Pressure Vessels for Low-Cycle Fatigue,” ASME J. Basic Eng., pp. 389–402.
3. ASME, 1969, “Criteria of the ASME Boiler and Pressure Vessel Code for Design by Analysis in Sections III and VIII, Division 2,” ASME, New York.
4. Dowling N. E., 1999, Mechanical Behavior of Materials, Second Edition, Prentice Hall, Upper Saddle River, NJ.
5. Dowling N. E., 1977, “Crack Growth During Low-Cycle Fatigue of Smooth Axial Specimens,” Cyclic Stress-Strain and Plastic Deformation Aspects of Fatigue Crack Growth, ASTM STP 637, Am. Soc. For Testing and Materials, West Conshohocken, PA, pp. 97–121.
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献