Volume 3: Design and Analysis最新文献_第10页

Mean Stress Correction for Fatigue Life of Carbon Steel: Proposal of Non-Closure Model 碳钢疲劳寿命的平均应力校正:非闭合模型的提出

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93253

M. Kamaya

引用次数: 0

A Study of the Conservatism in ASME BPVC Section VIII Division 2 Opening Design for External Pressure ASME BPVC第VIII卷第2节外压开口设计稳健性研究

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93565

B. Millet, K. Ebrahimi, James Lu, K. Kirkpatrick, Bryan Mosher

{"title":"A Study of the Conservatism in ASME BPVC Section VIII Division 2 Opening Design for External Pressure","authors":"B. Millet, K. Ebrahimi, James Lu, K. Kirkpatrick, Bryan Mosher","doi":"10.1115/pvp2019-93565","DOIUrl":"https://doi.org/10.1115/pvp2019-93565","url":null,"abstract":"\u0000 In the ASME Boiler and Pressure Vessel Code, nozzle reinforcement rules for nozzles attached to shells under external pressure differ from the rules for internal pressure. ASME BPVC Section I, Section VIII Division 1 and Section VIII Division 2 (Pre-2007 Edition) reinforcement rules for external pressure are less stringent than those for internal pressure. The reinforcement rules for external pressure published since the 2007 Edition of ASME BPVC Section VIII Division 2 are more stringent than those for internal pressure. The previous rule only required reinforcement for external pressure to be one-half of the reinforcement required for internal pressure. In the current BPVC Code the required reinforcement is inversely proportional to the allowable compressive stress for the shell under external pressure. Therefore as the allowable drops, the required reinforcement increases. Understandably, the rules for external pressure differ in these two Divisions, but the amount of required reinforcement can be significantly larger.\u0000 This paper will examine the possible conservatism in the current Division 2 rules as compared to the other Divisions of the BPVC Code and the EN 13445-3. The paper will review the background of each method and provide finite element analyses of several selected nozzles and geometries.","PeriodicalId":150804,"journal":{"name":"Volume 3: Design and Analysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128954183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Model for Ductile Rupture Under Cyclic Loading Conditions 循环加载条件下韧性断裂的新模型

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93836

A. Remmal, S. Marie, J. Leblond

{"title":"New Model for Ductile Rupture Under Cyclic Loading Conditions","authors":"A. Remmal, S. Marie, J. Leblond","doi":"10.1115/pvp2019-93836","DOIUrl":"https://doi.org/10.1115/pvp2019-93836","url":null,"abstract":"\u0000 Experiments have shown that ductile failure occurs sooner under cyclic loading conditions than under monotone ones. This reduction of ductility probably arises from an effect called “ratcheting of the porosity” that consists of a continued increase of the mean porosity during each cycle with the number of cycles. Improved micromechanical simulations confirmed this interpretation. The same work also contained a proof that Gurson’s classical model for porous ductile materials does not predict any ratcheting of the porosity. In a recent work [6], the authors proposed a Gurson-type “layer model” better fit than Gurson’s original one for the description of the ductile behavior under cyclic loading conditions, using the theory of sequential limit analysis. A very good agreement was obtained between the model predictions and the results of the micromechanical simulations for a rigid-hardenable material. However, the ratcheting of the porosity is a consequence of both hardening and elasticity, and sequential limit analysis is strictly applicable in the absence of elasticity. In this work, we make a proposal to take into account elasticity in the layer model through the definition of a new objective stress rate leading to an accurate expression of the porosity rate accounting for both elasticity and plasticity. This proposal is assessed through comparison of its predictions with the results of some new micromechanical simulations performed for matrices exhibiting both elasticity and all types of hardening: isotropic, kinematic and mixed, to better comply with the hypothesis made to derive the model.","PeriodicalId":150804,"journal":{"name":"Volume 3: Design and Analysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130900047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Basic Design Rules for Lines in Pulsating Flow Service 脉动流管道的基本设计原则

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93459

Menno Eijgenhuijsen, Girish Masand

{"title":"Basic Design Rules for Lines in Pulsating Flow Service","authors":"Menno Eijgenhuijsen, Girish Masand","doi":"10.1115/pvp2019-93459","DOIUrl":"https://doi.org/10.1115/pvp2019-93459","url":null,"abstract":"\u0000 To avoid unacceptable vibration of suction and discharge piping for reciprocating pumps and compressors, acoustic and mechanical response analyses are to be carried out. These analyses are generally provided by the suppliers of such equipment. This paper explains the fundamentals behind an acoustic and mechanical response analysis and provides a simple set of consolidated design and engineering rules. The paper encourages application of these rules while developing the equipment and piping layout as well as pipe support configuration. The aim of these rules is to minimize the chance for the ultimate supplier’s detailed acoustic & mechanical response analysis to recommend significant changes to the design in a late stage of a project. Specific emphasis is placed on how the support stiffness affects the natural frequency of the piping system and a practical methodology is provided to account for this in pipe support span calculations. This paper also describes the process information that needs to be submitted to the supplier to conduct a meaningful acoustic as well as mechanical response analysis. Acknowledging requirements for lines in pulsating service at a late stage in the project, not providing the supplier with the required process information or a piping and support configuration that is not ‘mature’ enough will most likely result in significant delay and cost.","PeriodicalId":150804,"journal":{"name":"Volume 3: Design and Analysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130309885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Repair of B31.1 Fiber Reinforced Polymer Piping System Using Carbon Fiber Reinforced Polymer 碳纤维增强聚合物修复B31.1纤维增强聚合物管道系统

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93103

J. Hebeisen, T. Adams, Bruce F. Dubovecky, T. Jiménez

引用次数: 0

Comparison of Fracture Assessments of Corrosion Pits Using Sharp and Blunt Notched Crack Procedures 用锋利和钝切口裂纹方法对腐蚀坑进行断裂评估的比较

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93297

C. Meek, M. Spence

{"title":"Comparison of Fracture Assessments of Corrosion Pits Using Sharp and Blunt Notched Crack Procedures","authors":"C. Meek, M. Spence","doi":"10.1115/pvp2019-93297","DOIUrl":"https://doi.org/10.1115/pvp2019-93297","url":null,"abstract":"\u0000 Historically, when determining failure criteria for a cracked structure, the structure has been assessed with the crack tip assumed to be infinitely sharp. For scenarios where it can be shown that the crack tip is blunt, such as for corrosion pits, this may lead to overly pessimistic assessments which can have implications for remnant life assessments of structures.\u0000 Recent research has been carried out to evaluate structures with the crack tip as a blunt notch with a radius, and to develop a notch acuity parameter. That research led to formulae for adapting either the failure assessment curve or the failure assessment points utilising the notch acuity parameter for ferritic materials.\u0000 This paper analyses various configurations of crack and specimen geometry, crack tip notch acuity parameter and crack spacing. It takes a finite element model of a cracked structure with an infinitely sharp crack and compares the failure parameters to those of equivalent notched cracks. The comparison is completed using the formulae derived in recent literature and those determined using finite element models with the blunt notched radii at the crack tip incorporated into the model.","PeriodicalId":150804,"journal":{"name":"Volume 3: Design and Analysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130998708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of a Flanged and Dished Head Assembly Used in a Horizontal Storage Tank 用于卧式储罐的法兰和碟形封头总成分析

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93221

Mingxin Zhao

{"title":"Analysis of a Flanged and Dished Head Assembly Used in a Horizontal Storage Tank","authors":"Mingxin Zhao","doi":"10.1115/pvp2019-93221","DOIUrl":"https://doi.org/10.1115/pvp2019-93221","url":null,"abstract":"\u0000 A nonstandard flanged and dished head is frequently used in the horizontal storage tank for quick and full access to the internal in oil and gas industry. The head is forged into an elliptical shape with a flat edge at its peripheral. The flat edge serves as a flange while the other mating half coming from the tank shell. The flange pair is installed within a C-shaped clamp and secured by compression bolts at its head side. A gasket is sandwiched between the mating surfaces of the flange pair to provide proper seal. While the head can be removed easily by unscrewing the compression bolts, this disintegrated structure does increase the complexity in component design and unique requirement for installation. The bolt compression load not only affects the pressure capacity of the storage tank, but also governs the stresses in flange pair and C-clamp. In this study, the flanged and dished head assembly has been modeled and analyzed by finite element method for stresses and gasket seal performance subject to installation and operation loads. Both elastic and elastic-plastic analysis has been performed. The tightening force of the bolts is examined against component stresses and gasket seal performance. Optimized bolt load is recommended based on acceptance criteria for stresses and leakage prevention.","PeriodicalId":150804,"journal":{"name":"Volume 3: Design and Analysis","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122187070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fatigue Analysis for the Lower Assembly of a U-Tube Steam Generator u型管蒸汽发生器下总成疲劳分析

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93222

Moli Cao

引用次数: 0

Implementing B31J-2017 SIF and Flexibility Factor Changes for B31 Piping Systems 实施B31J-2017 SIF和B31管道系统的灵活性系数变化

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-94074

Anthony Paulin, L. Carpenter, C. Becht

引用次数: 0

A New Design Method for Axially Loaded Thin-Walled Cylindrical Shells Based on Elasto-Plastic Buckling Analysis 基于弹塑性屈曲分析的轴向载荷薄壁圆柱壳设计新方法

Volume 3: Design and Analysis Pub Date : 2019-11-15 DOI: 10.1115/pvp2019-93233

P. Jiao, Zhiping Chen, He Ma

引用次数: 4