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RISDevelopment of Fatigue Crack Growth Thresholds for Austenitic Stainless Steels Exposed to Air Environment for ASME Code Section XI
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fatigue crack growth thresholds ΔKth define stress intensity factor range below which cracks will not grow. The thresholds ΔKth are useful in industries to determine durability lifetime. Although massive fatigue crack ...
Development of Stress Intensity Factors for Cracks With Large Aspect Ratios in Pipes and Plates
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The stress intensity factors (SIFs) for pipes containing semi-elliptical surface cracks with large aspect ratios were calculated by finite-element analysis (FEA). The cracks were circumferential and axial surface cracks ...
Study on Flaw to Surface Proximity Rule for Transforming Subsurface Flaws to Surface Flaws Based on Fatigue Crack Growth Experiments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: If a subsurface flaw is located very near a component surface, the subsurface flaw is categorized as a surface flaw. The boundary of the subsurface and surface flaws is required for flaw evaluation. The subsurface flaw is ...
Reference Curve of Fatigue Crack Growth for Ferritic Steels Under Negative R Ratio Provided by ASME Code Section XI
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Reference curves of fatigue crack growth rates for ferritic steels in air environment are provided by the ASME Code Section XI Appendix A. The fatigue crack growth rates under negative R ratio are given as da/dN versus ...
Plastic Collapse Moment for Weld Overlay Pipe With Multiple Circumferential Flaws
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Weld overlay is one of the useful repair methods for cracked piping that has been successfully applied for piping in many nuclear power plants. This paper proposes an approach for predicting plastic collapse moment for ...
Stress Intensity Factor Interaction for Subsurface to Surface Flaw Transformations Under Stress Concentration Fields
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: If a single subsurface flaw is detected that is close to a component's free surface, a flaw-to-surface proximity rule is used to determine whether the flaw should be treated as a subsurface flaw, or transformed to a surface ...
Application Scope of Limit Load Criterion for Ductile Material Pipes With Circumferentially External Cracks
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Bending stress at plastic collapse for a circumferentially cracked pipe is predicted by limit load criterion provided by the Appendix C of the ASME Code Section XI. The equation of the Appendix C is applicable for pipes ...
Fatigue Crack Growth for Ferritic Steel Under Negative Stress Ratio
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The phenomenon of crack closure is important in the prediction of fatigue crack growth behavior. Many experimental data indicate crack closures during fatigue crack growths both under tensile–tensile loads and tensile–compressive ...
Allowable Cracks Related to Penetration for Part-Through Cracks in Pipes Subjected to Bending Stresses
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fully plastic collapse stresses for circumferentially part-through cracked pipes subjected to bending stresses are estimated by limit load criteria provided by the ASME Code Section XI. Allowable crack depths were determined ...
Technical Basis for Revising the Fatigue Crack Growth Rates for Ferritic Steels in the ASME Code Section XI
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fatigue crack growth thresholds ΔKth and reference fatigue crack growth rate da/dN curves for ferritic steels in air environment are provided in Appendix Y of the ASME Boiler and Pressure Vessel Code Section XI. Therein, ...