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RISNotch Behavior of Components Under the Stress-Controlled Creep–Fatigue Condition: Weakening or Strengthening?
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Notch-related weakening and strengthening behavior under creep–fatigue conditions was studied in terms of the elastic–viscoplasticity finite-element method (FEM). A coupled damage analysis, i.e., the skeletal point method ...
Evaluation of Simplified Creep Design Methods Based on the Case Analysis of Tee Joint at Elevated Temperature
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Based on a tee joint, the simplified creep design methods of ASME code, elastic-perfectly plastic (EPP) analysis of Code Case N-861 (CC N-861) and the inelastic analysis by isochronous stress strain (ISS) curve, were ...
Effect of Welding Residual Stress on the Buckling Behavior of Storage Tanks Subjected to Harmonic Settlement
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effect of welding residual stress on the buckling behavior of storage tanks subjected to the harmonic settlement was simulated using the shell-to-solid coupling method. In the numerical model of tanks coupled with the ...
On Fatigue Design Curves for 2.25Cr-1Mo-V Steel Reactors at Elevated Temperature in Code Case 2605
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fatigue design method for 2.25Cr-1Mo-V steel reactors in code case 2605 (CC 2605) is reviewed. Main factors such as the accelerating function of fatigue action, the cyclic frequency, the strain damage factor (β) related ...
Notch Effect on Structural Strength of Components at Elevated Temperature Under Creep, Fatigue, and Creep-Fatigue Loading Conditions: Phenomenon and Mechanism
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Structural discontinuities (e.g., nozzle, hole, and groove) widely occur in many high temperature components of nuclear and fossil power plants. In general, the notched component is used for simplified tests and analyses ...
A Probabilistic Evaluation Method on Temperature and Time-Dependent Stress Intensity Limit St in Creep Assessment of Components at Elevated Temperatures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Creep is an important damage mode of components at elevated temperatures, and the temperature and time-dependent stress intensity limit St is an essential indicator in creep assessment of components. In general, the safety ...
Creep Failure Behavior of Notched Structure in the Simulated Steam Turbine Rotor: Experimental and Damage Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Notched structures widely exist in steam turbine components in fossil power plant, e.g., the groove of the rotor, etc. Previous studies indicate that creep failures occur at the groove of the rotor or the adjacent regions. ...
An Improved Creep-Fatigue Life Model Involving the Cyclic Softening/Hardening and Stress Relaxation Effect
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this work, improved creep-fatigue life prediction models based on time fraction (TF) and ductility exhaustion (DE) rule are established for creep-fatigue life prediction of components at elevated temperatures. Cyclic ...
A Creep Buckling Design Method of Elliptical Heads Based on the External Pressure Chart
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The buckling design criteria of elliptical heads in ASME VIII-1, ASME NH, and RCC-MRx are reviewed and compared. Accordingly, an external pressure chart (EPC) based buckling design approach is developed for elliptical heads ...
A Creep Buckling Design Method of Elliptical Heads Based on the External Pressure Chart
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: The buckling design criteria of elliptical heads in ASME VIII-1, ASME NH, and RCC-MRx are reviewed and compared. Accordingly, an external pressure chart (EPC) based buckling design approach is developed for elliptical heads ...