Journal of Pressure Vessel Technology: Recent submissions
Now showing items 1321-1340 of 4506
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A Fully Implicit, Lower Bound, Multi Axial Solution Strategy for Direct Ratchet Boundary Evaluation: Implementation and Comparison
(The American Society of Mechanical Engineers (ASME), 2014)Ensuring sufficient safety against ratcheting is a fundamental requirement in pressure vessel design. However, determining the ratchet boundary using a full elasticplastic finite element analysis can be problematic and a ... -
Development of a New Bolt Spacing Formula
(The American Society of Mechanical Engineers (ASME), 2014)Bolted flange joints are extensively used to connect pressure vessels and piping equipment together. They are simple structures that offer the possibility of disassembly. However, they often experience leakage problems due ... -
Coupled Thermomechanical Analysis of Autofrettaged and Shrink Fitted Compound Cylindrical Shells
(The American Society of Mechanical Engineers (ASME), 2014)In this study, different configurations of compound multilayer cylinders subjected to autofrettage and shrinkfit processes and under combined cyclic thermal and pressure loads have been investigated and their fatigue life ... -
Probabilistic Structural Integrity Analysis of Reactor Pressure Vessels During Pressurized Thermal Shock Events
(The American Society of Mechanical Engineers (ASME), 2014)To apply a probabilistic fracture mechanics (PFM) analysis to the structural integrity assessment of a reactor pressure vessel (RPV), a PFM analysis code has been developed at JAEA. Using this PFM analysis code, pascal ... -
Calculation of Dynamic Stress Intensity Factors for Pipes During Crack Propagation by Dynamic Finite Element Analysis
(The American Society of Mechanical Engineers (ASME), 2014)A dynamic finite element analysis method was proposed for calculating the dynamic stress intensity factors for pipes during crack propagation. The proposed method can directly calculate the stress intensity factors without ... -
A Unified Continuum Damage Mechanics Model for Predicting the Stress Relaxation Behavior of High Temperature Bolting
(The American Society of Mechanical Engineers (ASME), 2014)Two stress relaxation constitutive models have been developed to predict the stress relaxation behavior for hightemperature bolting according to continuum damage mechanics, Kachanov–Robatnov (K–R), and Othman–Hayhurst ... -
A Method Using Optical Contactless Displacement Sensors to Measure Vibration Stress of Small Bore Piping
(The American Society of Mechanical Engineers (ASME), 2014)In nuclear power plants, vibration stress of piping is frequently evaluated to prevent fatigue failure. A simple and fast measurement method is attractive to evaluate many piping systems efficiently. In this study, a method ... -
Challenges in Validation of Computational Weld Mechanics Code to Compute Residual Stress and Distortion in Welds
(The American Society of Mechanical Engineers (ASME), 2014)Validation of a computational weld mechanics (CWM) code for a particular welding application requires an estimate of the difference between experimentally measured parameters and parameters computed by a computational ... -
The Danger of Piping Failure Due to Acoustic Induced Fatigue in Infrequent Operations: Two Case Studies
(The American Society of Mechanical Engineers (ASME), 2013)Failure in piping due to acousticinduced fatigue can be considered catastrophic as it could happen only after a few minutes of operation. Acousticinduced fatigue occurs mainly in gas piping systems with high velocity where ... -
The Adhesion Failure Mode in Stainless Steel Trim Spring Operated Pressure Relief Valves
(The American Society of Mechanical Engineers (ASME), 2013)This paper addresses dangerous failures of stainless steel (SS) trim springoperated pressure relief valves (SOPRV) due to a particular failure mode (SStoSS adhesion), which is not currently being included in SOPRV failure ... -
Weld Strength Mismatch in Strain Based Flaw Assessment: Which Definition to Use?
(The American Society of Mechanical Engineers (ASME), 2013)Weld strength mismatch is a key factor in the strain based assessment of flawed girth welds under tension. A strength overmatching weld shields potential flaws within the weld itself from remotely applied deformations and ... -
Effect of Partial Welding on the Residual Stress and Structural Integrity of Piping Welds
(The American Society of Mechanical Engineers (ASME), 2013)When weld defects are observed during an inspection after welding, repair welding is performed after removing the defects. However, partial repair welding can potentially complicate the weld residual stress distribution. ... -
Cyclic Deformation Behavior and Buckling of Pipeline With Local Metal Loss in Response to Axial Seismic Loading
(The American Society of Mechanical Engineers (ASME), 2013)Buried pipelines may be corroded, despite the use of corrosion control measures such as protective coatings and cathodic protection, and buried pipelines may be deformed due to earthquakes. Therefore, it is necessary to ... -
Low Cycle Fatigue and Creep Fatigue Behavior of Alloy 617 at High Temperature
(The American Society of Mechanical Engineers (ASME), 2013)Alloy 617 is the leading candidate material for an intermediate heat exchanger (IHX) application of the very high temperature nuclear reactor (VHTR), expected to have an outlet temperature as high as 950 آ°C. Acceptance ... -
Investigation of Fluid Transients in Centrifugal Pump Integrated System With MultiChannel Pressure Vessel
(The American Society of Mechanical Engineers (ASME), 2013)A pressure vessel is installed to prevent transient vacuum and overpressure in centrifugal pump integrated system. In order to study the transient response of the pressure vessel with multichannels and improve design ... -
Dimensionless Compliance With Effective Modulus in Crack Length Evaluation for B أ— B Single Edge Bend Specimens
(The American Society of Mechanical Engineers (ASME), 2013)In ASTM standard E1820, the crack size, a, may be evaluated during Jintegral or cracktip opening displacement (CTOD) resistance testing using the measured crackmouth opening displacement (CMOD) elastic unloading compliance ... -
Theoretical and Experimental Analysis of a One Stage Water Hydraulic Relief Valve With a One Way Damper
(The American Society of Mechanical Engineers (ASME), 2013)According to the function and operating characteristics of water hydraulic relief valves in a highpressure water pipe system, a novel onestage relief valve with a oneway damper was designed and analyzed in this study. The ... -
Rational Determination of Lower Bound Fracture Toughness Curves Using Master Curve Approach
(The American Society of Mechanical Engineers (ASME), 2013)The Master Curve gives the relation between the median of fracture toughness of ferritic steels and the temperature in the ductile–brittle transition temperature region. The procedure used to determine the Master Curve ... -
Temperature Field Prediction of Rectangular Shell and Tube Heat Exchanger
(The American Society of Mechanical Engineers (ASME), 2013)Shellandtube heat exchangers are the most common type of heat exchangers in oil refineries and other large chemical processes. In this manuscript, we demonstrate that the shellside flow in a cylindrical shell was not as ... -
A New Analytical Approach for Wire Wound Frames Used to Carry the Loads of Pressure Vessel Closures
(The American Society of Mechanical Engineers (ASME), 2013)Wirewinding technique is usually applied to increase strength to weight ratio, to improve the fatigue life and prevent rapid failure of structures with high sensitivity. Most of the relations, which are presented for ...