International Journal of Pressure Vessels and Piping最新文献

{"title":"Effect of vertical reinforcement on the buckling behavior of thin-walled cylinders subjected to axial load","authors":"Francisco Cáceres ,&nbsp;José Colombo ,&nbsp;Gaspar Auad ,&nbsp;Victor Contreras ,&nbsp;José Almazán","doi":"10.1016/j.ijpvp.2025.105465","DOIUrl":"10.1016/j.ijpvp.2025.105465","url":null,"abstract":"<div><div>A series of 3D nonlinear finite element models were developed to evaluate the buckling behavior of a thin-walled cylinder with vertical reinforcing ribs evenly distributed around its perimeter. Reinforcement locations in the lower-upper zones, central section, and the entire mantle were analyzed, subjecting the cylinder to an axial compression load at the upper edge of the mantle. First, the 3D finite element models were validated by comparison with experimental results previously reported in the literature. Four reinforcement configurations were then applied to the initial geometry to assess the behavior of the cylinder with and without the proposed reinforcements. Buckling failure and load capacity of the thin-walled cylinders were analyzed. Nonlinearities due to material properties, second-order effects, and initial geometric imperfections were considered. The results show that full-height reinforcement in the compression zone of the mantle increases buckling resistance by <strong>40 %</strong> for thin-walled cylinders subjected to axial load. Therefore, this type of reinforcement can be a good alternative to enhance buckling resistance in cylindrical metallic structures, including tanks and silos, subjected to similar loading conditions.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105465"},"PeriodicalIF":3.0,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of residual stress on the axial buckling behaviour of the hydraulic-formed bellows","authors":"Shuang Yu ,&nbsp;Zhandong Wan ,&nbsp;Jian Lin ,&nbsp;Ziang Zhou ,&nbsp;Yehui Liu","doi":"10.1016/j.ijpvp.2025.105468","DOIUrl":"10.1016/j.ijpvp.2025.105468","url":null,"abstract":"<div><div>Residual stress is inevitable in the hydraulic-formed process of metal bellows. It is essential to consider the effect of residual stress on buckling behaviour of bellows in order to optimize the stability design. In this paper, a finite element model was developed to analyze the effect of residual stress on the axial buckling behavior of bellows under axial load and internal pressure. The model was validated by theoretical instability modes and formulas of bar system and cylindrical. The influence of residual stress on the buckling behaviour of bellows was discussed under different geometric shapes, material elastic modulus, and service temperatures. The results indicated that the critical instability load decreased under both applied axial load and combined load (axial and internal pressure load) when considering residual stress, while it increased under internal pressure loads. The reduction in axial load amplitude caused by residual stress increases with the increased elastic modulus and the decreased service temperature. The mechanism has been discussed and a pattern for optimizing design was proposed to enhance the stability and reliability of the bellows under complex conditions based on the established model.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"215 ","pages":"Article 105468"},"PeriodicalIF":3.0,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep transfer learning + BDENet: An innovative approach for detecting the internal defects of weld seams using radiographic imaging","authors":"Mengsi Zhang ,&nbsp;Xinyi Yu ,&nbsp;Hua Lu ,&nbsp;Yuhua Wu ,&nbsp;Ping Guo ,&nbsp;Guofu Lian","doi":"10.1016/j.ijpvp.2025.105467","DOIUrl":"10.1016/j.ijpvp.2025.105467","url":null,"abstract":"<div><div>The radiographic testing of weld defects is crucial for ensuring welding quality. Identifying these defects is challenging because radiographic images feature low brightness and contrast. The traditional measurement and grading of defect sizes heavily relies on the subjective judgment and operational proficiency of non-destructive testing personnel, which compromises the accuracy and consistency of results. This study proposes an automatic weld defect detection method based on deep transfer learning and BDENet to achieve the precise identification of various weld defects. Firstly, the backbone network was pre-trained on Pascal VOC2012 and SBD datasets. The optimal weights were determined by fine-tuning hyperparameters, which enhanced the feature extraction ability of the model. Subsequently, the datasets were processed using overlapping clipping, which enhanced the datasets and retained more boundary information. Then a novel BDENet model was introduced. The model featured an boundary detail enhancement network (BDENet) consisting of detail enhancement convolution and differential convolution. BDE enhanced the semantic information of boundary details in weld images by integrating prior information and differential features through residual addition. This enhancement significantly improved segmentation accuracy and sensitivity to small-scale features. Finally, the fine-tuned transfer learning technology was applied to the BDENet model. The proposed method outperformed other semantic segmentation models, achieving remarkable metrics: 86.70 % mIoU, 91.17 % mPA, 92.71 % mF1, and 90.99 % mR. These results validate the model's effectiveness, demonstrating its superiority in the semantic segmentation of radiographic images of defects.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"215 ","pages":"Article 105467"},"PeriodicalIF":3.0,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synchronously improving strength and toughness for pipeline steel weld via cerium adding","authors":"Ce Wang ,&nbsp;Xinjie Di ,&nbsp;Lianshuang Dai ,&nbsp;Jin Liu ,&nbsp;Jiawei Han ,&nbsp;Xiaocong Yang ,&nbsp;Zhaoqing Yang ,&nbsp;Shaohua Cui ,&nbsp;Chang Zhang ,&nbsp;Zhibo Ma ,&nbsp;Chengning Li","doi":"10.1016/j.ijpvp.2025.105466","DOIUrl":"10.1016/j.ijpvp.2025.105466","url":null,"abstract":"<div><div>The requirement for higher pressure gas flows and lower temperature service environments has emphasized the necessity to solve the trade-off between strength and impact toughness in pipeline steel weld. In this study, the strength and toughness were improved synchronously via cerium adding, and the strengthening-toughening mechanism and fracture behavior of the weld were revealed by multi-scale characterization. The research results indicated that the addition of Ce in 50–100 ppm can change the inclusion the inclusion from a single Al₂O₃ to a mixture of Al₂O₃ and CeAlO₃, and refines the its size. In addition, the original austenite grain size, acicular ferrite size and grain boundary ferrite fraction also decrease. The reduction of grain boundary ferrite and inclusions effectively inhibited the crack initiation position, which increased the yield strength from 584±11 MPa to 629±11 MPa and 603±12 MPa, the impact toughness from 73±11 J to 123±12 J and 107±12 J. Therefore, with the Ce content from 0 to 50 ppm and 100 ppm, the strength and toughness of the weld appear to increase and then decrease. Moreover, the coarse grain boundary ferrite cannot produce coordinated deformation due to its low Schmidt factor, resulting in the fracture of grain boundary ferrite, which seriously decrease the crack propagation energy.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"215 ","pages":"Article 105466"},"PeriodicalIF":3.0,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the mechanical response and numerical simulation of uniaxial compression of coal based on size effect","authors":"Junwen Zhang ,&nbsp;Yang Zhang ,&nbsp;Shiji Wang ,&nbsp;Chaorui Xing ,&nbsp;Xvkai Dong ,&nbsp;Shaokang Wu ,&nbsp;Zhixiang Song ,&nbsp;Yan Zhou","doi":"10.1016/j.ijpvp.2025.105463","DOIUrl":"10.1016/j.ijpvp.2025.105463","url":null,"abstract":"<div><div>With the intensification of coal mining, coal pillars have become weak links in mining systems, resulting in an increasing frequency of coal pillar rock burst disasters. The impact mechanisms, conditions, and failure characteristics of coal pillars vary depending on their size. For this reason, it is important to investigate the mechanical properties of coal pillars under different size conditions to prevent and control coal pillar rock bursts. In this work, the mechanical response of nine coal samples under uniaxial compression is analysed. Different coal samples undergo stress and fracture evolution during the entire failure process, which can be determined via discrete element software. The results show that (1) the stress‒strain curves of coal samples are strongly influenced by their size. When the sample diameter is 25 mm, the coal sample curve presents a three-stage failure process. As the diameter increases, the stress‒strain curve evolves gradually into a four-stage failure process. (2) The failure characteristics of the coal sample involve primarily shearing failure, which transitions from ‘single slash’ shear failure to ‘double slash’ conjugate shear failure as the diameter increases. A coal sample with a diameter-to-height ratio greater than 1:1 has primarily tensile failure characteristics. (3) Size significantly influences the energy and damage ageing evolution of coal samples during uniaxial compression. The height and diameter of a coal sample affect its dissipative energy growth starting point. The damage stage and damage rate of coal samples vary depending on their size. (4) Discrete element numerical simulations reveal that the characteristics of crack propagation are determined by the distribution of internal stress in coal samples. Macroscopic failure characteristics are determined by the types of main cracks in coal samples.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"215 ","pages":"Article 105463"},"PeriodicalIF":3.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pressure vessel failure analysis and numerical optimization of a composite repair patch with experimental validation","authors":"Benjamin Mihaljec ,&nbsp;Goran Vukelić ,&nbsp;Željko Božić ,&nbsp;Reza Bakhtiari","doi":"10.1016/j.ijpvp.2025.105454","DOIUrl":"10.1016/j.ijpvp.2025.105454","url":null,"abstract":"<div><div>In this experimental and numerical study, an analysis of a failed steel pressure vessel is performed, along with an attempt to repair it using an optimized composite patch. Failure analysis is done using experimental non-destructive testing methods (visual and ultrasonic testing). It occurred that the failure was caused by excessive corrosion around the drain hole of the vessel. In an attempt to repair the vessel using a composite patch, numerical optimization of the thickness of the patch was performed first. A numerically optimized solution was used to build a composite repair patch and apply it to the failed pressure vessel. Experimental analysis revealed that the optimized composite patch is able to withstand the pressure set in the vessel. This type of optimization can help in reducing the costs of applying the composite patch to repair failed pressure vessels.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"215 ","pages":"Article 105454"},"PeriodicalIF":3.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on fusion regulation mechanism of dissimilar steel welds based on compound magnetic field","authors":"Wei Zhou ,&nbsp;Jianfeng Yue ,&nbsp;Shishuang Liu ,&nbsp;Pu Zhong ,&nbsp;Hao Zhou ,&nbsp;Zhijie Wang","doi":"10.1016/j.ijpvp.2025.105464","DOIUrl":"10.1016/j.ijpvp.2025.105464","url":null,"abstract":"<div><div>Due to significant differences in the mechanical and physical properties of materials, low-alloy steel/stainless-steel joints by gas tungsten arc welding (GTAW) have welding quality problems such as incomplete penetration and cracking, which are caused by large variations in base metal fusion ratio. To address such issues, in this study, the effect of the regulation mechanism by a compound magnetic field approach (longitudinal magnetic field (LMF) + cusp magnetic field (CMF)) on the base metal fusion ratio in Q345/316L dissimilar metal welds was investigated, through arc behavior, weld formation, and microstructure evolution. The suppression methods of weld defects such as incomplete penetration are also discussed. It was found that compound magnetic field-assisted dissimilar steel welding can be used to control the base metal fusion ratio, effectively avoid defects due to incomplete weld penetration, and significantly improve the quality of dissimilar steel weldments. Compared with the sample without external magnetic field (EMF), as the exciting currents increased, the fusion ratio of Q345 in the dissimilar steel weld <em>FR</em>_Q345 gradually diminished from 34.15 % to 11.99 %; The fusion ratio of base metals <em>FR</em>_BMs gradually diminished from 46.55 % to 26.55 %; The content of brittle-phase martensite in the weld metal gradually decreased, and the content of residual austenite phase significantly increased. The dendrite arm spacing (DAS) was significantly reduced under the influence of the compound magnetic field, resulting in the refinement degree ranging from 32.58 % to 46.83 %. These results provide guidance for heat energy regulation in dissimilar steel welding and a new solution for improving the welding quality of dissimilar metals with asymmetric material properties.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"215 ","pages":"Article 105464"},"PeriodicalIF":3.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanical characteristics of reinforced soft tubes under combined internal pressure and thermal loads","authors":"Chen Fu ,&nbsp;Lingxiao Quan ,&nbsp;Yi Li ,&nbsp;Yuheng Geng ,&nbsp;Changhong Guo","doi":"10.1016/j.ijpvp.2025.105458","DOIUrl":"10.1016/j.ijpvp.2025.105458","url":null,"abstract":"<div><div>Reinforced polytetrafluoroethylene (PTFE) soft tubes are subjected to high internal pressure and thermal loads during operation. These conditions pose significant challenges to their structural reliability and the safety of aircraft piping systems. To investigate the mechanical characteristics of the reinforced soft tubes under internal pressure and thermal loads, a high-precision finite element model is developed. Firstly, the effects of braiding angle and diameter-to-thickness ratio on the load-bearing capacity of the reinforced soft tubes are examined. Subsequently, the mechanical responses under varying ambient temperatures are analyzed in conjunction with thermal loads. Finally, the accuracy of the simulation model and methodology is validated through a pressure resistance test at 21 MPa. The results indicate that 54.7°is the optimal braiding angle for the reinforced soft tubes, and a smaller diameter-to-thickness ratio enhances the pressure resistance of the tubes. The metal-reinforced layer serves as the primary structural support, with its stress increasing by 109.76% as oil pressure rises from 10.5 MPa to 21 MPa. Additionally, high temperatures induce stress concentration in the metal-reinforced layer, while extreme temperature differences result in severe deformation of the inner tube. Experimental validation demonstrates that the maximum stress error of the finite element model is within 12.22%. These findings provide crucial insights into the design and optimization of the reinforced soft tubes, emphasizing how material properties and structural configurations can improve the safety and reliability of aircraft piping systems under complex flight conditions.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"215 ","pages":"Article 105458"},"PeriodicalIF":3.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation and analysis of full-coverage ultrasonic signal detection for reinforcement part of nuclear reactor pressure vessel outlet nozzle","authors":"Maocheng Hong ,&nbsp;Yilin Li ,&nbsp;Jingli Yan ,&nbsp;Guanbing Ma ,&nbsp;Xin Ye ,&nbsp;Huaidong Chen ,&nbsp;Xiaobing Zhang","doi":"10.1016/j.ijpvp.2025.105462","DOIUrl":"10.1016/j.ijpvp.2025.105462","url":null,"abstract":"<div><div>Pressurized water reactors (PWRs) are the predominant type of nuclear power plant globally, with their reactor pressure vessels (RPVs) subject to stringent in-service inspection (ISI) requirements as mandated by regulatory standards. However, the complex curved surface of the reinforcement part presents challenges for ultrasonic testing in the outlet nozzle-to-shell weld areas, resulting in inaccessible zones that lack practical quantitative analysis methods for volume coverage. This study systematically parameterized the geometric features of the outlet nozzle reinforcement part, including the cone, fillet, and ellipse. It introduced seven categories of ultrasonic beam tangent segmentation algorithms based on spatial curves. Using Pro/E software, we developed a 3D ultrasonic beamline model of inaccessible zones and validated its accuracy against two-dimensional data obtained from AutoCAD. Building on this foundation, a fully parametric simulation model and discrete volume data were employed to plot the continuous curves of inaccessible zones’ volume on the side of the typical outlet nozzle reinforcement part as a function of ultrasonic incidence angles, elucidating the nonlinear, multi-stage superimposed impact of complex surface characteristics on the volume of inaccessible zones. This research provides vital theoretical support and a methodological basis for optimizing ultrasonic testing processes and quantitative evaluation of volume coverage in nozzle areas with complex surfaces, particularly saddle-like profiles.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105462"},"PeriodicalIF":3.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Material selection of titanium alloy pipelines considering multi-criteria in an acidic environment based on analytic hierarchy process","authors":"Dezhi Zeng ,&nbsp;Jiancheng Luo ,&nbsp;Chengxiu Yu ,&nbsp;Guangguang Xiang ,&nbsp;Ting Mao ,&nbsp;Shaomu Wen ,&nbsp;Zhiming Yu ,&nbsp;Yang Zhong ,&nbsp;Wen Chen ,&nbsp;Jing Yan","doi":"10.1016/j.ijpvp.2025.105461","DOIUrl":"10.1016/j.ijpvp.2025.105461","url":null,"abstract":"<div><div>In the construction of offshore oil and gas projects, the selection of pipeline materials is significant and challenging. In the complex marine environment, it is difficult to ensure the safe service life of oil and gas pipelines selected only based on the consideration of the corrosion resistance of materials. Therefore, multiple performance indicators should be comprehensively considered in the material selection. The partial pressure of H₂S and CO₂ in the oil and gas of an offshore block was as high as 2 MPa and the temperature of the transported fluid was up to 70 °C. Rock particles were carried in the fluid. In this study, TA3, TA10, and TA36 titanium alloy materials to be used in this block were evaluated through various tests, including physical and chemical tests (tensile test, impact test, bending test, and hardness test), friction wear test, gas-solid erosion test, corrosion test, and corrosion wear test. In this paper, based on the consideration of the performance indicators and expert knowledge corresponding to the above tests, a material selection method based on analytic hierarchy process was proposed and the priority in the material selection of marine pipelines was studied. In addition, the microstructures and element distributions of the tensile and impact fractures, erosion pits, and friction traces of the materials were studied by a scanning electron microscope, an energy dispersive spectroscope, and a laser confocal microscope. The results of hierarchical analysis showed that the selection priority of TA3, TA10, and TA36 titanium alloys was TA10 &lt; TA3 &lt; TA36. TA36 titanium alloy was the best material choice for the submarine pipeline system in the target area and the corresponding weight was 0.60121. The results provided the basis for the selection of the best material alternative for the construction of submarine pipelines in this block.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"216 ","pages":"Article 105461"},"PeriodicalIF":3.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}