This paper is the first part of a two part paper. It describes the concepts of shakedown at elevated temperatures that form the foundation for proposed rules described in the second paper for extension of fatigue design rules in Section VIII, Division 2, Part 5 slightly into the creep range. These proposed rules use shakedown concepts and a cycle limit as a basis for exemption from fatigue analysis.
Issue Section:Design and Analysis
Keywords:creep, design engineering, fatigue, temperature
Topics:Creep, Cycles, Stress, Temperature, Relaxation (Physics), Fatigue
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ASME Boiler and Pressure Vessel Code, Section VIII, Division 2.
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Extension of Fatigue Exemption Rules in Section VIII, Div 2 Slightly into the Creep Range,”
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Experimental Evaluation of the Markl Fatigue Methods and ASME Piping Stress Intensification Factors,”
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Extend Fatigue Exemption Rules for Low Cr Alloys Slightly Into the Time-Dependent Range for Section VIII Div 2 Construction,” FRP-ASMEST-07-03, ASME Standards Technology LLC.
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by American Society of Mechanical Engineers