Journal of Pressure Vessel Technology: Recent submissions
Now showing items 1161-1180 of 4506
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An Assessment of Mechanical Properties of A508 3 Steel Used in Chinese Nuclear Reactor Pressure Vessels
(The American Society of Mechanical Engineers (ASME), 2015)China has very ambitious goals of expanding its commercial nuclear power by 30 GW within the decade and wishes to phase out fossil fuels emissions by 40–45% by 2020 (from 2005 levels). With over 50 new nuclear power ... -
On the Effectiveness of Two Isolation Systems for the Seismic Protection of Elevated Tanks
(The American Society of Mechanical Engineers (ASME), 2015)This paper deals with the effectiveness of two isolation systems for the seismic protection of elevated steel storage tanks. In particular, the performance of high damping rubber bearings (HDRB) and friction pendulum ... -
A Pipe Bend Subject to a Uniformly Distributed Radial Force
(The American Society of Mechanical Engineers (ASME), 2015)The effects of a distributed radial load on an elbow or bend within a piping system, caused by changes in momentum due to fluid flow, can be represented by one or more point loads. Simplified methods result in inaccurate ... -
Low Cycle Fatigue and Ratcheting Responses of Elbow Piping Components
(The American Society of Mechanical Engineers (ASME), 2015)The objective of this study was to investigate lowcycle fatigue and ratcheting responses of elbows through experimental and analytical studies. Lowcycle fatigue and ratcheting damage accumulation in piping components may ... -
Characterization of PTFE Based Gaskets at High Temperature
(The American Society of Mechanical Engineers (ASME), 2015)The objective of this work is to analyze the hot blowout test procedure (HOBT) used to determine the maximum operating temperature of Teflonbased gaskets. The study focuses on the effect of thermal cycles and a few ... -
Two Bar Thermal Ratcheting for Alloy 617—Part II: Ratcheting Results
(The American Society of Mechanical Engineers (ASME), 2015)This is Part II of a study on twobar thermal ratcheting for Alloy 617. The ratcheting strains were evaluated for conditions with the same temperature range but with different mean stresses, heating and cooling rates, time ... -
Experimental and Numerical Studies of Ratcheting in a Pressurized Piping System Under Seismic Load
(The American Society of Mechanical Engineers (ASME), 2015)Rational seismic design procedures necessitate comprehensive evaluation of nuclear piping systems under large amplitude seismic loads. This comprehensive assessment requires accurate prediction of inelastic response of ... -
Ratchet Limit Solution of a Beam With Arbitrary Cross Section
(The American Society of Mechanical Engineers (ASME), 2015)The classical approaches in shakedown analysis are based the assumption that the stresses are eventually within the elastic range of the material everywhere in a component (elastic shakedown). Therefore, these approaches ... -
Two Bar Thermal Ratcheting for Alloy 617—Part I: Scoping Tests
(The American Society of Mechanical Engineers (ASME), 2015)A twobar thermal ratcheting procedure has been implemented to Alloy 617 at very high temperatures. The procedure is based on two bars tested on two coupled servo hydraulic machines to achieve equal displacement and constant ... -
Progress in Lower Bound Direct Methods
(The American Society of Mechanical Engineers (ASME), 2015)The paper reports on recent progress in numerical shakedown and limit analysis based on Melan's lower bound shakedown theorem. After explaining the theoretical foundations of their approach, the authors describe in detail ... -
Using the Nonlinear Kinematic Hardening Material Model of Chaboche for Elastic–Plastic Ratcheting Analysis
(The American Society of Mechanical Engineers (ASME), 2015)Commonly used design codes for power plant components and pressure vessels include rules for ratcheting analysis that specify limits on accumulated strain. No guidance is provided on the use of the material model. The ... -
A Proposal for a Simplified Assessment Procedure to API 579 Standard
(The American Society of Mechanical Engineers (ASME), 2015)The objective of this research paper is to propose, to API 579 standard, a simplified assessment procedure for shakedown limit load determination. The proposed assessment procedure applies the Simplified Technique, replacing ... -
Verification of the Linear Matching Method for Limit and Shakedown Analysis by Comparison With Experiments
(The American Society of Mechanical Engineers (ASME), 2015)The linear matching method (LMM), a direct numerical method for determining shakedown and ratchet limits of components, has seen significant development in recent years. Previous verifications of these developments against ... -
Ratcheting Prediction of 1070 and 16MnR Steel Alloys Under Uniaxial Asymmetric Stress Cycles By Means of Ohno–Wang and Ahmadzadeh–Varvani Kinematic Hardening Rules
(The American Society of Mechanical Engineers (ASME), 2015)The present study predicts ratcheting response of 1070 and 16MnR steel samples using nonlinear kinematic hardening rules of Ohno–Wang (O–W) and Ahmadzadeh–Varvani (A–V) under uniaxial stress cycles. The ratcheting ... -
Constitutive Models in Simulating Low Cycle Fatigue and Ratcheting Responses of Elbow
(The American Society of Mechanical Engineers (ASME), 2015)As stated in the sister article that the objective of this study was to explore the lowcycle fatigue and ratcheting failure responses of elbow components through experimental and analytical studies. Lowcycle fatigue and ... -
Special Section on Ratcheting
(The American Society of Mechanical Engineers (ASME), 2015)When significant cyclic loading is applied, the evaluation of fatigue and ratcheting effects becomes necessary. Fatigue analysis is concerned with avoiding the initiation and propagation of cracks that could eventually ... -
Natural Frequencies of Plate Supported Thermowells
(The American Society of Mechanical Engineers (ASME), 2015)An idealized model of a weldedflange thermowell is used to establish the role of flange thickness in natural frequency estimates. It is found that for thermowell diameters comparable to flange thickness, the support ... -
Beating in Pipes Subject to Shock
(The American Society of Mechanical Engineers (ASME), 2015)Often when a pipe is subjected to a shock input in the vertical direction, the pipe will vibrate horizontally after initially vibrating vertically. This vibration is beating that occurs between the vertical and horizontal ... -
Measurement of Fatigue Crack Growth Relationships in Hydrogen Gas for Pressure Swing Adsorber Vessel Steels
(The American Society of Mechanical Engineers (ASME), 2015)Hydrogenassisted fatigue crack growth rates (da/dN) were measured for SA516 Grade 70 steel as a function of stressintensity factor range (خ”K) and loadcycle frequency to provide lifeprediction data relevant to pressure ... -
Constraint Dependent J R Curves of a Dissimilar Metal Welded Joint for Connecting Pipe Nozzle of Nuclear Pressure Vessel
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, the JR curves of two cracks (A508 HAZ crack 2 and A508/Alloy52Mb interface crack 3) located at the weakest region in an Alloy52M dissimilar metal welded joint (DMWJ) for connecting pipenozzle of nuclear ...