Volume 2: Computer Technology and Bolted Joints; Design and Analysis最新文献_第6页

Research on the Influence of Girth Weld Joint Matching Degree on the Safety Performance of High Steel Grade Pipeline Based on ASME Local Strain Limit Criterion 基于ASME局部应变极限准则的高钢级管道环焊缝匹配度对安全性能的影响研究

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84636

Xin Liu, Liangxin Sun, Yongsheng Xu, Haitao Wang, G. Deng

{"title":"Research on the Influence of Girth Weld Joint Matching Degree on the Safety Performance of High Steel Grade Pipeline Based on ASME Local Strain Limit Criterion","authors":"Xin Liu, Liangxin Sun, Yongsheng Xu, Haitao Wang, G. Deng","doi":"10.1115/pvp2022-84636","DOIUrl":"https://doi.org/10.1115/pvp2022-84636","url":null,"abstract":"\u0000 In this study, numerical simulation is used to analyze the influence of the mechanical properties matching degree of weld, HAZ and base metal on the maximum axial strain of high steel grade pipeline. Based on ASME VIII-2 local strain limit criterion and cumulative damage model, the fracture process of girth weld structure under axial displacement and internal pressure is simulated with XFEM. The material parameters of base metal and weld which are necessary for the simulation calculation are obtained by monotonic tensile test, and the material parameters of HAZ are assumed to be lower than those of the weld and base metal to a certain extent. The results show that for different matching degree combinations, the crack initiation location always appears in the HAZ with the lowest mechanical properties, and the axial strain of the pipeline decreases with the increase of the internal pressure. For the undermatched girth weld, the lower the mechanical properties of the weld is, the smaller the maximum axial strain of the girth weld pipe is. For overmatched girth weld, when the internal pressure is less than 6 MPa, the maximum axial strain of 20% overmatched girth weld pipe is higher than that of 10% overmatched girth weld pipe. However, when the internal pressure is higher than 6 MPa, the maximum axial strain of 20% overmatched girth weld pipe is smaller.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88372722","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

Investigations on the Failure Behavior of Specimens Containing Crack Fields Made by Additive Manufacturing 含裂纹场的增材制造试样破坏行为研究

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84666

L. Stumpfrock, U. Weber, S. Weihe, M. Seidenfuss, Linda Mally

{"title":"Investigations on the Failure Behavior of Specimens Containing Crack Fields Made by Additive Manufacturing","authors":"L. Stumpfrock, U. Weber, S. Weihe, M. Seidenfuss, Linda Mally","doi":"10.1115/pvp2022-84666","DOIUrl":"https://doi.org/10.1115/pvp2022-84666","url":null,"abstract":"\u0000 Laminar and quasi-laminar orientations of hydrogen flakes with an inclination up to 16° to the pressure retaining surface were found in pressure vessels of Belgian nuclear power plants. Because of their orientation, these crack tips undergo predominantly mixed-mode loading conditions under internal pressure and the induced stress and strain fields of the single crack tips influence each other.\u0000 In a former paper, the failure behavior under mixed-mode loading conditions was investigated at RT (Room Temperature) in the upper shelf and in the lower transition region of the steel 22NiMoCr3-7, respectively. In this paper, the failure behavior will be shown for many different levels of material toughness (beginning from upper shelf down to the lower shelf region) on experiments.\u0000 Additionally numerical simulations are carried out with extended micromechanical based damage mechanics models. For the description of ductile failure mode the Rousselier model is used and the Beremin model to calculate the probability of cleavage fracture. To simulate the sensitivity for low stress triaxiality damage by shear loading, the damage mechanics model was enhanced with a term to account for damage evolution by shear. For numerical simulations in the transition region of brittle-to-ductile failure a coupled damage mechanics model (enhanced Rousselier & Beremin) will be used. In this paper, the current state of the ongoing research project is presented.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88489018","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

Washers: Are They as Good as We Think? 洗衣机:它们像我们想象的那么好吗?

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-83610

Scott R. Hamilton, Dan Meigs

{"title":"Washers: Are They as Good as We Think?","authors":"Scott R. Hamilton, Dan Meigs","doi":"10.1115/pvp2022-83610","DOIUrl":"https://doi.org/10.1115/pvp2022-83610","url":null,"abstract":"\u0000 Many bolting professionals in the heavy industrial industry rely on the belief that “Washers play an essential role in generating and sustaining integrity in bolted assemblies.” [1] It is believed that washers improve the reliability of bolted joints by providing a consistent K-Factor by introducing a flat even plane on which the nut can rotate.\u0000 During practical training we noticed that using washers resulted in greater difference in bolt load between studs than experienced without washers. That experience led the authors to hypothesize that washers do not improve the accuracy and repeatability of bolted flange joints. This paper reports the findings of a study conducted to test this hypothesis.\u0000 The study recorded the variance in measured K-Factor when tightening nuts against various flange surfaces with and without washers and determined that, when properly lubricated, the performance of studs against various flange surfaces did not vary greatly from the performance of studs against washers. Additionally, in some cases washers introduced a source of variance in bolt load.\u0000 In addition to their perceived benefit in generating and maintaining tension in the bolted flange joint, washers are understood to provide benefits including preventing damage to the flange surface, preventing galling of the flange surface, and preventing nut embedment. This study focused on the use of washers in generating the expected bolt load and did not assess those additional benefits of washer usage.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85522750","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

Revision of the Annex Z V Concerning the Calculation of Bolted Joints in the French Nuclear Code RCC-M® 修订了法国核规范RCC-M®中关于螺栓连接计算的附录zv

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-81911

H. Lejeune, Philippe Rohart, M. Triay, Aurélien Di Rienzo

{"title":"Revision of the Annex Z V Concerning the Calculation of Bolted Joints in the French Nuclear Code RCC-M®","authors":"H. Lejeune, Philippe Rohart, M. Triay, Aurélien Di Rienzo","doi":"10.1115/pvp2022-81911","DOIUrl":"https://doi.org/10.1115/pvp2022-81911","url":null,"abstract":"\u0000 AFCEN is the publisher of the French Nuclear code RCC-M® (Design and Construction Rules for Mechanical Components of PWR Nuclear Islands) [1]. It has launched an action for the revision of the Annex Z V and F 7000, respectively concerning the design and the installation of the bolted flange connections. It should be published as probationary phase rules (Section VI of RCC-M®), in the next version of the code, in 2022. The proposed modifications for F 7000 have already been described in [2], and this paper focuses on the proposed modification for the calculation method detailed in the Annex Z V.\u0000 First, the general philosophy and structure of the Annex, including both Taylor-Forge based (Z V 2000) and NF EN 1591-1 [3] based (Z V 3000) calculation methods, is introduced. Then the major proposed improvements introduced in Z V 2000 (Taylor-Forge based), compared to current edition, are detailed. This includes the management of the metal-to-metal contact (MMC) in the connection (between flanges or between flanges and the gasket limiter ring) that can be required in both assembly and operation. Moreover, the use of specific gasket types involved in these connections (Expanded Graphite Ring or Metal Energized C-Ring...) is covered in this paper. Finally, a focus is also performed on other introductions, like the management of standard connections (including standard flanges, gasket, and bolts), the account for the tightening scatter, the effective gasket width determination in regard with the flange rigidity, and the internal force variation in the connections due to thermal expansion.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"196 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86097399","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

Numerical Simulation Comparative Analysis of Pipe Soil Interaction in Buried Pipeline 埋地管道管土相互作用数值模拟对比分析

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84573

Feng Xu, Yongsheng Xu, Jianfei Song, Hongchao Suo, Xin Liu

引用次数: 0

Estimation of Bolt Creep Characteristics and Sealing Performance of Flanged Joints 法兰连接螺栓蠕变特性及密封性能评估

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-78366

Hiroshi Yamanaka

{"title":"Estimation of Bolt Creep Characteristics and Sealing Performance of Flanged Joints","authors":"Hiroshi Yamanaka","doi":"10.1115/pvp2022-78366","DOIUrl":"https://doi.org/10.1115/pvp2022-78366","url":null,"abstract":"\u0000 In the published standards, selection criteria for bolt materials for high temperature and high pressure environments (exceeding 540°C (1000°F) and 300 lb) has not been specified. In addition, it seems that there are few studies that summarize how the initial bolt load and the flange nominal diameter affect the change over time of the bolt load under a high temperature environment. This paper proposed formulas to calculate the changes over time in bolt stress and gasket stress easily due to bolt creep by applying the mechanical relationship of bolted flange joint. The changes over time in the bolt stress and the gasket stress calculated by the proposed formulas were fairly good agreement with the FEM and the experiments. By utilizing proposed formulas, it is possible to predict when retightening should be carried out for bolted flange joints operated continuously for a long period of time. Furthermore, in the present paper, the effects of initial bolt load, internal pressure, bolt materials, and flange nominal diameters on the sealing performance under high temperature environments are clarified by utilizing proposed formulas and FEM. As a result, this paper shows that the increasing initial bolt load against bolt creep under a high temperature environment can not be expected to be effective, and that the size of internal pressure and flange nominal diameter has small effects on the change over time of bolt load.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89584554","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

The Follow Up Development and on the Usage of the Profiled Wire Gasket 异形钢丝垫片的后续开发及应用

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-80855

Erik Sullivan, A. Currie

引用次数: 0

Research on the Laws of Soil Subsidence Range on the Response of Buried Pipelines 土壤沉降范围对埋地管道响应规律的研究

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84585

Feng Xu, Yongsheng Xu, Jianfei Song, Cenfan Liu, Xin Liu

引用次数: 0

Simplified Formulas for External Pressure Design 外压设计简化公式

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-78354

W. M. Kirkland, Christopher R. Bett

{"title":"Simplified Formulas for External Pressure Design","authors":"W. M. Kirkland, Christopher R. Bett","doi":"10.1115/pvp2022-78354","DOIUrl":"https://doi.org/10.1115/pvp2022-78354","url":null,"abstract":"\u0000 Design of vessels for external pressure currently requires a chart-based solution or analytical approaches which are not necessarily intuitive. In this paper, we propose simple formulas for the external pressure evaluation of pipes and other cylindrical pressure vessels. We present a conceptual comparison between the elastic and elastic-plastic stability of structural columns and that of cylindrical vessels of long, intermediate, and short length. Their common features allow an accurate and straightforward approach for external pressure design. The approach is also extended to spherical caps, conical vessels, and formed heads.\u0000 We compare the method presented to the current acceptance criteria from various design codes, including the ASME Boiler and Pressure Vessel Code Section VIII, Code Case 2286, and EN 13445-3, as well as codes for steel and aluminum structures. In further discussion, the simplified method is compared against the results of more than 500 experiments on the buckling of cylindrical and spherical vessels published over the past two centuries.\u0000 This simple but accurate approximation is conceptually intuitive, analytically straightforward, and shows potential utility in pressure vessel design codes, as well as piping design codes such as B31 that currently reference ASME VIII for external pressure design.1","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87349190","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

Probabilistic Fracture Mechanics Codes for Piping International Benchmark – Part 1: Deterministic Comparisons 管道国际基准的概率断裂力学规范。第1部分:确定性比较

Volume 2: Computer Technology and Bolted Joints; Design and Analysis Pub Date : 2022-07-17 DOI: 10.1115/pvp2022-84724

Matthew Homiack

{"title":"Probabilistic Fracture Mechanics Codes for Piping International Benchmark – Part 1: Deterministic Comparisons","authors":"Matthew Homiack","doi":"10.1115/pvp2022-84724","DOIUrl":"https://doi.org/10.1115/pvp2022-84724","url":null,"abstract":"\u0000 This paper describes deterministic benchmark comparisons of 14 probabilistic fracture mechanics (PFM) codes. The benchmark problem focused on determining the leak-before-break behavior of a nickel-based alloy weld in a large-bore piping system of a pressurized-water reactor. The modeled degradation mechanism was primary water stress-corrosion cracking (PWSCC). The benchmark problem was deterministically analyzed with the PFM codes using their models for crack growth rates, stress-intensity factors, crack-opening displacements (CODs), crack transition from inside surface-breaking cracks to through-wall cracks, leak rates, and crack stability. Several output quantities of interest relevant to leak-before-break behavior were then compared. Other outputs as a function of the simulated component operating time were also compared, including the crack lengths and depths, stress-intensity factors, inside and outside surface CODs, and leak rates. An interpretation of these comparisons is provided in relation to the underlying models to better understand the effects of the different modeling approaches. Insights from this study will be used to inform probabilistic comparisons of the PFM codes, which will be presented in a subsequent paper.","PeriodicalId":23700,"journal":{"name":"Volume 2: Computer Technology and Bolted Joints; Design and Analysis","volume":"146 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86024117","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