Journal of Pressure Vessel Technology-Transactions of the Asme最新文献_第7页

A Method of Evaluating the Driving Force and Stresses During Tube Die Expansion 管模膨胀过程中驱动力和应力的计算方法

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2023-01-05 DOI: 10.1115/1.4056604

Zijian Zhao, A. Bouzid, Linbo Zhu

{"title":"A Method of Evaluating the Driving Force and Stresses During Tube Die Expansion","authors":"Zijian Zhao, A. Bouzid, Linbo Zhu","doi":"10.1115/1.4056604","DOIUrl":"https://doi.org/10.1115/1.4056604","url":null,"abstract":"\u0000 In this study, an analytical approach based on the energy method is used to estimate the force required to expand tubes for different die shapes. The proposed method calculates the driving force by the volume energy change and working effect ratio instead of depending on the contact pressure and the shape of the contact surface in the previous studies. The new approach greatly reduces the difficulty of the analysis and simplifies the calculation.\u0000 Since the accurate stress distribution in the transition zone is essential for determining the working effect factor, a new analytical approach with self-adaption is also introduced to estimate the strain and stress distribution in the transition zone of an expanding tube, and the contact position between die and tube can also be obtained by this approach.\u0000 In this study, three finite element models as a numerical approach are used to develop an axisymmetric model including multiple linear kinematic hardening behavior to confirm the approach. Additionally, copper and steel 3/8 inch tubes are expanded with oval dies on a designed test workbench with different boundary conditions. The tangential, longitudinal strains and driving force are monitored and recorded during the expansion process.\u0000 Finally, the results from the three approaches show a very good agreement.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47872238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the Buckling Load of Clamped Spherical Caps Under External Pressure: Analyzed by the Fourier Series Model with Initial Geometric Imperfections 外压作用下夹紧球形帽的屈曲载荷研究:含初始几何缺陷的傅立叶级数模型分析

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2022-12-16 DOI: 10.1115/1.4056509

Sanlong Zheng, Yiqi Zhang, Jiawei Xu, Bingbing Chen, Pengfei Wang, Yang Liu

{"title":"Research on the Buckling Load of Clamped Spherical Caps Under External Pressure: Analyzed by the Fourier Series Model with Initial Geometric Imperfections","authors":"Sanlong Zheng, Yiqi Zhang, Jiawei Xu, Bingbing Chen, Pengfei Wang, Yang Liu","doi":"10.1115/1.4056509","DOIUrl":"https://doi.org/10.1115/1.4056509","url":null,"abstract":"\u0000 The knockdown factor (KDF), which characterizes the difference between the actual buckling pressure and the classical theoretical pressure of shallow spherical shells under external pressure. By scanning six shallow spherical shells, the geometric characteristics of the shells were analyzed, and a geometric model was established based on the Fourier series. 720 sets of shallow spherical shells under external pressure were simulated using the proposed Fourier series model and simulation method. The influence of the yield strength, geometrical parameter λ, dimensionless parameters radius-thickness ratio R/t, and the imperfection-thickness ratio e/t on KDF were studied, and the highly discrete characteristics of KDF were reproduced. The results showed that the proposed method has a better predictive effect on KDF, which is significantly improved over the &amp;quot;Eigemode imperfections&amp;quot; method. KDF is not only related to λ and e/t, but is also affected by the yield strength and R/t. The lower envelopes of KDF were obtained when e/t was is less than 1.0 and 2.0. The NASA SP-8032 curve corresponds to the lower envelope of KDF when e/t is less than 8.0, and the curve is below the lower envelope of KDF when e/t is less than 1.0 and 2.0. As stipulated in the pressure vessel standard, the KDF obtained by NASA SP-8032 will be conservative for design conditions with e/t less than 1.0 or 2.0, and appropriate adjustment should be considered.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43549275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigations of In-Plane Fluidelastic Instability in a Multi-span U-bend Tube Array – Part I: Tests in Air Flow 多跨U形弯管阵列平面内流体弹性失稳研究——第一部分：气流试验

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2022-12-13 DOI: 10.1115/1.4056466

P. Feenstra, T. Sawadogo, Bruce A. W. Smith, Victor Janzen, Helen Cothron

{"title":"Investigations of In-Plane Fluidelastic Instability in a Multi-span U-bend Tube Array – Part I: Tests in Air Flow","authors":"P. Feenstra, T. Sawadogo, Bruce A. W. Smith, Victor Janzen, Helen Cothron","doi":"10.1115/1.4056466","DOIUrl":"https://doi.org/10.1115/1.4056466","url":null,"abstract":"\u0000 The tubes in the U-bend region of a recirculating type of nuclear steam generator are subjected to cross-flow of a two-phase mixture of steam and water. There is a concern that these tubes may experience flow-induced vibration, including the damaging effects of fluidelastic instability. This two-part series of papers presents the results of flow-induced vibration experiments performed by Canadian Nuclear Laboratories for the Electric Power Research Institute (EPRI) using the Multi-Span U-Bend test rig. The tube bundle is made of 22 U-bend tubes of 12.7 mm (0.5 in) diameter, arranged in a rotated triangular configuration with a pitch-to-diameter ratio of 1.5. The test rig was equipped with variable clearance flat bar supports at two different locations to investigate a variety of tube and flat-bar support configurations. The primary purpose of the overall project was to study the occurrence of In Plane (or streamwise) fluidelastic instability in a U-tube bundle with flat-bar tube supports with clearances or preloads. Initially, the test rig was configured for tests in airflow using an industrial air blower. Then tests with two-phase Refrigerant (R-134a) were performed. Part I of this two-part series describes the test rig, experimental setup and some of the challenges encountered, and the results of experiments with air flows. Part II will present results of tests using refrigerant two-phase flows.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42911787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigations of In-Plane Fluidelastic Instability in a Multi-Span Tube Array – Part II: Tests in Two-Phase Flow 多跨管阵列平面内流体弹性失稳研究——第二部分：两相流试验

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2022-12-13 DOI: 10.1115/1.4056467

P. Feenstra, T. Sawadogo, Bruce A. W. Smith, Victor Janzen, A. McLellan, Helen Cothron, Sean Kil

{"title":"Investigations of In-Plane Fluidelastic Instability in a Multi-Span Tube Array – Part II: Tests in Two-Phase Flow","authors":"P. Feenstra, T. Sawadogo, Bruce A. W. Smith, Victor Janzen, A. McLellan, Helen Cothron, Sean Kil","doi":"10.1115/1.4056467","DOIUrl":"https://doi.org/10.1115/1.4056467","url":null,"abstract":"\u0000 Tests to study Fluidelastic Instability in an array of U-bend tubes were recently completed in the Multi-Span U-Bend test rig at Canadian Nuclear Laboratories. These tests were sponsored by the Electric Power Research Institute and were designed to study In-Plane Fluid elastic instability of steam generator tubes in two-phase cross flow. This instability mechanism was first observed in previous experiments by Atomic Energy of Canada Limited. This mechanism was not thought to be a serious practical concern until 2012 when it caused severe damage to tubes in a new replacement steam generator in a nuclear power plant in the United States. In this study, tests were conducted both with flows of air and two-phase liquid/vapour Refrigerant 134a. The tube bundle consisted of 22 flexible U-bend tubes supported by a configurable flat-bar arrangement. Testing focused on the effects of support geometry and tube-to-support interaction. Data was recorded from 33 dynamic signals from accelerometers, displacement probes, force transducers, and void-fraction probes. Part I of this two-part series presented results of air tests. Part II presents results of tests using two-phase Freon refrigerant (R-134a) as the working fluid.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49461625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic Cavitation Inception by Wave Propagation Across Solid-Fluid Interface with Varying Solid Surface Wettability 随着固体表面润湿性的变化，波在固-液界面上的传播引起动态空化

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2022-12-06 DOI: 10.1115/1.4056438

Tomohisa Kojima, K. Inaba

{"title":"Dynamic Cavitation Inception by Wave Propagation Across Solid-Fluid Interface with Varying Solid Surface Wettability","authors":"Tomohisa Kojima, K. Inaba","doi":"10.1115/1.4056438","DOIUrl":"https://doi.org/10.1115/1.4056438","url":null,"abstract":"\u0000 Fluid-structure interaction (FSI) problems are important because they may induce serious damage to structures. In some FSI problems, the interaction mechanism is strongly dependent on the wave propagation across the solid-fluid interface. In this study, we attempted a quantitative evaluation of the effect of the solid surface wettability on the wave propagation across the solid-fluid interface with FSI in the case of longitudinal wave propagation vertically towards the interface. During the experiments, while the water was continuously compressed by the solid buffer motion, cavitation bubbles appeared being originated from the buffer-water interface as a result of the transmitted tensile wave propagating across the interface in a cycle. It was confirmed that interfacial boundary condition as wettability could change the wave transmission behavior owing to changes in the cavitation occurrence. It was also confirmed that the worse the wettability, the severer the cavitation intensity, and the greater the difference between the energy lost by the buffer and the energy stored in the water. Consequently, the effect of the cavitation inception on the wave propagation at the solid-fluid interface with FSI could be quantitatively evaluated by considering the energy transferred from the solid to the water.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41627847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Analysis of a New Pressure Relief Valve for Oil-Immersed Electrical Equipment 一种新型油浸式电气设备溢流阀的设计与分析

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2022-12-03 DOI: 10.1115/1.4056382

Liang Luo, Jinzhong Li, Nong Zhang, Ke Wang, Shuqi Zhang, Ningchuan Liang

{"title":"Design and Analysis of a New Pressure Relief Valve for Oil-Immersed Electrical Equipment","authors":"Liang Luo, Jinzhong Li, Nong Zhang, Ke Wang, Shuqi Zhang, Ningchuan Liang","doi":"10.1115/1.4056382","DOIUrl":"https://doi.org/10.1115/1.4056382","url":null,"abstract":"\u0000 Internal arcing in oil-immersed electrical equipment is inevitable and of great danger. Transient overpressure should be released by protectors quickly and controllably. Currently available pressure relief valves cannot fully protect the electrical equipment due to mismatch between insufficient relief capacity with correspondingly weak valve structure and increasing arcing energy in upgrading electrical systems. Additionally, flaming possibility of ejected high-temperature oil-gas mixture is distinct, and retained oil in an oil tank without any isolation may be ignited by the flame. Unfortunately, re-sealing of some existing single-outlet valves is out of control due to asymmetrical hydraulic pressure distribution on the valve plate which causes unstable valve plate movement. Therefore, a new pressure relief valve characterised by symmetrical outlets was developed. The novel structure and function of the new valve was firstly introduced, and comprehensive analysis regarding dynamic performances, strength and fluid development during the relief process were conducted. Finally, a prototype was manufactured and tested on a specific test system. The developed valve can well release the overpressure generated by a 6 MJ equivalent arcing fault without any flame during the entire relief process. Furthermore, the valve structure can withstand the pressure load, and valve plate can precisely re-seal the oil tank due to optimized fluid pressure distribution. This research provides an optimized pressure relief valve and a design guide for improved pressure relief valve.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45400373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing Cladded Components for High Temperature Nuclear Service. Part-2: Design Rules 高温核设施用包壳部件的设计。第2部分：设计规则

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2022-11-08 DOI: 10.1115/1.4056151

B. Barua, M. Messner, R. Jetter, T. Sham

{"title":"Designing Cladded Components for High Temperature Nuclear Service. Part-2: Design Rules","authors":"B. Barua, M. Messner, R. Jetter, T. Sham","doi":"10.1115/1.4056151","DOIUrl":"https://doi.org/10.1115/1.4056151","url":null,"abstract":"\u0000 The challenge of using existing ASME Section III, Division 5, Class A metallic materials for the construction of structural components of advanced reactors with corrosive coolants could be mitigated by allowing designers to use cladding to protect the base materials from corrosion. However, the existing Section III, Division 5 rules provide no guidance on the evaluation of strain accumulation and creep-fatigue damage in cladded components. The availability of design rules for cladded components that do not require long-term clad materials testing could promote the application of the cladding approach to accelerate the deployment schedule of these advanced reactor systems. To avoid long-term properties for the clad materials Part 1 of this work proposes two approximate design analysis methods for two types of clad materials - soft clads that creep much faster and have lower yield stress than the Class A base material, and hard clads that creep much slower and have higher yield stress than the Class A base material. The proposed analysis methods approximate the response of a soft clad by treating it as perfectly compliant and of a hard clad by treating it as linear elastic. Based on these approximate design analysis strategies this Part 2 develops a complete set of design rules for Class A components cladded with either soft or hard clad materials. Part 2 discusses the reasoning behind the proposed design rules and uses example finite element analyses of representative reactor components to illustrate the use of these design methods.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46894006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-Axisymmetric Buckling Stress of Axially Compressed Circular Cylindrical Shells: Closed-Form and Simplified Formulae 轴向压缩圆柱壳的非轴对称屈曲应力:封闭形式和简化公式

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2022-11-08 DOI: 10.1115/1.4056152

Abubakr E. S. Musa, Osamah H.A. Dehwah, Madyan A. Al-Shugaa, H. Al-Gahtani

{"title":"Non-Axisymmetric Buckling Stress of Axially Compressed Circular Cylindrical Shells: Closed-Form and Simplified Formulae","authors":"Abubakr E. S. Musa, Osamah H.A. Dehwah, Madyan A. Al-Shugaa, H. Al-Gahtani","doi":"10.1115/1.4056152","DOIUrl":"https://doi.org/10.1115/1.4056152","url":null,"abstract":"\u0000 Due to their thin-walled characteristics, axially loaded circular cylindrical shells (CCSs) commonly undergo buckling failure. The limiting buckling stress of such shells has not yet been fully developed due to a wide range of influencing parameters such as sensitivity to imperfections, nonlinearity, and buckling mode. It has been proved early, and in this study, that the non-axisymmetric buckling stress can be one of the remedies that casts into eliminating the overestimation caused by the classical axisymmetric buckling formula. However, the complex non-linear constrained optimization required to obtain the non-axisymmetric buckling stress and mode remains to be the main obstacle for practicing engineers to approach the non-axisymmetric buckling. In this study, the non-axisymmetric buckling formula has been cast in a compact form and possible approaches to utilize it have been discussed considering the degree of user knowledge and availability of computational tools. Moreover, it has been used to derive a closed-form buckling stress formula that considers the effect of all geometric and material properties. The proposed closed-form formula predicts buckling stress that is always less than that of the classical formula for L/R greater than 0.91 and the amount of reduction increases with the increase of L/R ratio. In comparison with the exact non-axisymmetric buckling formula, the proposed closed-form formula yields buckling stress within ± 4%. Thus, it shares the simplicity of the classical axisymmetric buckling formula and the accuracy of the non-axisymmetric buckling formula.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46756630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stress Shifting Effect of Hydrogen Mixed Natural Gas Pipe Under Seismic Wave 地震波作用下氢气混合天然气管道的应力位移效应

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2022-10-27 DOI: 10.1115/1.4056083

Huohai Yang, Jie Zhang, Yang Chen

{"title":"Stress Shifting Effect of Hydrogen Mixed Natural Gas Pipe Under Seismic Wave","authors":"Huohai Yang, Jie Zhang, Yang Chen","doi":"10.1115/1.4056083","DOIUrl":"https://doi.org/10.1115/1.4056083","url":null,"abstract":"\u0000 Hydrogen energy is a kind of clean secondary energy sources. Mixed hydrogen natural gas transportation technology is a new scheme of hydrogen transportation put forward in recent years. Using natural gas pipe to transport hydrogen is expected to further promote its application. In order to study the mechanical properties of buried steel pipe under the action of seismic waves, a numerical model of buried pipe is established. The time history and distribution of pipe section's stress under seismic wave are analyzed. Effects of seismic intensity, surrounding soil, buried depth and seismic wave type on pipe's mechanical properties are discussed. The results show that the pipe section stress fluctuates under the action of seismic wave, and the stress shifting effect occurs. The maximum stress is located in the directions of 45°, 135°, 225° and 315°. Stress increases with the increasing of seismic intensity, and the stress distribution of the pipe section is also changed. Stress responses of the pipe in different soil are different, and the stress distribution of pipe section at the maximum stress time is similar. The deeper the buried depth is, the greater the pipe stress is. Pipe stress is related to the maximum acceleration of the seismic wave and the spectrum characteristics. Those results can provide a basis for the design and safety evaluation of mixed hydrogen natural gas pipes.","PeriodicalId":50080,"journal":{"name":"Journal of Pressure Vessel Technology-Transactions of the Asme","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42507244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Heat-to-Heat Variability On Long-Term Creep Rupture Lifetime Predictions of Single Step Aged Wrought Haynes 282 Alloy 热-热变异性对单步时效变形Haynes 282合金长期蠕变断裂寿命预测的影响

IF 1 4区工程技术

Journal of Pressure Vessel Technology-Transactions of the Asme Pub Date : 2022-10-27 DOI: 10.1115/1.4056084

V. Cedro, M. Render, Kelechi Chukwunenye

引用次数: 0