International Journal of Pressure Vessels and Piping最新文献

{"title":"Piping structural health monitoring: ANN methods for internal semi-elliptical crack detection","authors":"Saber Kashfi,&nbsp;Jafar Rouzegar,&nbsp;Alireza Tavakolpour-Saleh","doi":"10.1016/j.ijpvp.2024.105417","DOIUrl":"10.1016/j.ijpvp.2024.105417","url":null,"abstract":"<div><div>This study investigates the detection and characterization of longitudinal internal semi-elliptical cracks in circular steel pipes using artificial neural networks (ANNs) within a structural health monitoring framework (SHM). Internal semi-elliptical cracks, which are prevalent in pipes and pressure vessels and challenging to detect with conventional non-destructive testing methods, are modeled to evaluate their impact on natural frequencies and mode shapes. Finite element simulations are validated against analytical and numerical data to ensure accuracy. The results reveal that an increase in the crack's large diameter, while maintaining a constant depth, significantly reduces the natural frequencies. ANN models employing cascade forward back propagation (CFBP) and feed forward back propagation (FFBP) algorithms are developed to predict the shape and location of cracks based on natural frequency data. The models are trained and tested using 78 datasets derived from vibration responses of six geometric crack ratios at varying positions, employing the k-fold cross-validation method with <em>k</em> = 6. The CFBP algorithm demonstrates superior performance, achieving a high correlation coefficient of 0.98898 in crack detection. The novelty of this work lies in addressing the complex effects of semi-elliptical cracks on structural responses and leveraging natural frequency shifts as diagnostic parameters. This approach bridges a critical research gap by providing a robust methodology for detecting concealed internal cracks in pressure vessels, advancing SHM practices.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105417"},"PeriodicalIF":3.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164438","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":"The longitudinal mechanical behavior of steel pipes with pitting corrosion under the coupling effect of complex service loads","authors":"Ying Ma ,&nbsp;Bin Li ,&nbsp;Hongyuan Fang ,&nbsp;Xueming Du ,&nbsp;Niannian Wang ,&nbsp;Danyang Di ,&nbsp;Kejie Zhai","doi":"10.1016/j.ijpvp.2024.105423","DOIUrl":"10.1016/j.ijpvp.2024.105423","url":null,"abstract":"<div><div>Corrosions on the outer walls stand as the primary cause of decreased structural integrity in steel water supply pipes. Pitting corrosion is identified as one of the most severe corrosion types. The failure risk of steel pipes with pitting corrosion significantly increases under the effects of complex service loads. In this study, full-scale tests of steel pipes with pitting corrosion on the outer wall under complex service loads were conducted. FE models capable of simulating the spatiotemporal interplay between the corroded steel pipe-soil structure and the pressurized fluid inside the pipe were developed. Comparative analysis was performed on the measured and simulated longitudinal strains and bending moments under complex operational loads for corroded and intact pipes. The impact of traffic loads, internal pressure, groundwater levels, and normalized corrosion parameters on the longitudinal Von Mises stress and bending moments of corroded steel pipes was investigated. The results indicate that, under standard corrosion parameters, the peak longitudinal Von Mises stress and positive bending moment at the crown of corroded pipe increase by 64.3 % and 397.3 %, respectively, compared to intact pipes. The corrosion depth has a more significant effect on the peak longitudinal Von Mises stress and positive bending moment than corrosion width and corrosion length. As the corrosion depth increases from 0.2 to 0.8, the peak longitudinal Von Mises stress and positive bending moment at the crown increase by 175.9 % and 193.4 %, respectively, while the negative bending moment is largely unaffected by corrosion geometric parameters. Increasing traffic loads from 0.4 MPa to 1.2 MPa results in increases of 23.3 %, 148.5 %, and 198.1 % in the peak longitudinal Von Mises stress, positive bending moment, and negative bending moment, respectively. Internal pressure increasing from 0.1 MPa to 1.0 MPa leads to increases of 328.8 % and 81.9 % in the peak longitudinal Von Mises stress and positive bending moment, respectively, with negligible changes in the negative bending moment. When the groundwater level rises from 600 mm below the bottom to 600 mm above the crown, the vertical displacement at the crown increases by 66.9 %.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105423"},"PeriodicalIF":3.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165499","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 on J-integral plasticity factor of high-grade pipeline girth welded joints based on SENT specimen","authors":"Yue Tian ,&nbsp;Shengzhu Zhang ,&nbsp;Xu Wang ,&nbsp;Yi Shuai ,&nbsp;Tieyao Zhang ,&nbsp;Yingquan Duo","doi":"10.1016/j.ijpvp.2024.105419","DOIUrl":"10.1016/j.ijpvp.2024.105419","url":null,"abstract":"<div><div>The girth welded joint of pipeline is a kind of special structure of high-pressure pipeline, which is extremely easy to crack under the combined action of internal and external loads, defects and stress concentration. It is particularly important to accurately evaluate the fracture toughness of each material area of high-grade pipeline girth welded joints to ensure the structural integrity of pipelines. In this paper, the clamped single edge notch tension (SENT) specimens of high-grade pipeline girth welded joints are taken as the research object. Through theoretical analysis, physical experiments, extensive finite element analysis (FEA) and machine learning (ML) methods, the numerical changes of <em>J</em>-integral plasticity factor of SENT specimens under different geometric parameters (crack length, specimen thickness, weld width) and mechanical properties parameters (strain hardening exponent, weld matching coefficient) are studied. The influence of specimen geometry and material properties on plasticity factor is discussed. A large number of FE calculation results are used as a database, and a ML model with strong nonlinear prediction ability is established through hyperparameter debugging. The model can quickly and accurately obtain the plastic factor values of SENT specimens of high-grade pipeline under 5 input parameters, which provides a reference for the fracture evaluation of high-grade pipeline girth welded joints.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105419"},"PeriodicalIF":3.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165503","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":"Master curve reference temperature behavior of steels with varying Ni/Mn content and subjected to a fluence of 11·1019 neutron/cm2","authors":"Sebastian Lindqvist ,&nbsp;Murthy Kolluri ,&nbsp;David Cinger ,&nbsp;Maksym Zarazovskii ,&nbsp;Szavai Szabolcs ,&nbsp;Eberhard Altstadt","doi":"10.1016/j.ijpvp.2024.105421","DOIUrl":"10.1016/j.ijpvp.2024.105421","url":null,"abstract":"<div><div>The degradation of fracture toughness due to irradiation needs to be understood to assess the structural integrity of reactor pressure vessels for long-term operation. The level of degradation is dependent on the chemical content, particularly of elements like Ni and Mn. The fracture toughness properties for three types of steels (i.e. VVER-1000 steel, western model steel and VVER-1000 welds) with varying contents of Ni and Mn were characterized based on Master Curve T₀ reference temperature in reference condition and in irradiated condition. The results show that, in the high fluence region, the shifts in T₀ correlate with the content of Ni and Mn, and the scatter in fracture toughness is mostly consistent for the reference and irradiated conditions. At higher T₀ values, above 75 °C, T_41J gives an increasingly larger estimate compared to T₀. The obtained results can be applied to develop new improved embrittlement trends curves for NPP lifetime assessment.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105421"},"PeriodicalIF":3.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Finite element and experimental analysis of residual stresses in G20Mn5 welded joints considering solid-state phase transformation","authors":"Haihan Jiao,&nbsp;Hui Jin","doi":"10.1016/j.ijpvp.2024.105422","DOIUrl":"10.1016/j.ijpvp.2024.105422","url":null,"abstract":"<div><div>Residual stress (RS) induced during the welding of steel structures can significantly affect their load-bearing capacity. Solid-state phase transformation (SSPT) is essential to the temperature and stress variations during welding, presenting challenges for accurate analysis. Many current numerical simulations overlook SSPT effects in thermal coupling and the key parameters are difficult to obtain. This study enhances the precision of welding simulations by establishing a prediction network for the kinetic parameters of SSPT and introducing a thermal-metallurgical-mechanical finite element program in ABAQUS, which incorporates SSPT. It explores the impact of SSPT on the welding of cast steel welded joints (CSJ). Initially, a predictive model based on the radial basis function (RBF) neural network is developed to determine the kinetic parameters of SSPT for relevant materials, enabling rapid and precise prediction of the base material's SH-CCT diagram. Subsequently, a multi-physics field coupled welding process calculation program is created in ABAQUS software, considering SSPT, latent heat, and associated expansion, its accuracy is validated through experimental cases. Ultimately, the study concludes that the volume change induced by SSPT reduces welding RS, while tensile RS, stress concentration, and welding defects on the inner surface of CSJ increase the risk of structural cracking at the weld root.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105422"},"PeriodicalIF":3.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164437","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":"A novel method for predicting fatigue crack propagation path of surface cracks in pipelines with a ConvLSTM-based model","authors":"Jianxing Yu ,&nbsp;Yefan Su ,&nbsp;Zihang Jin ,&nbsp;Hanxu Tian ,&nbsp;Mingren Zhao","doi":"10.1016/j.ijpvp.2024.105420","DOIUrl":"10.1016/j.ijpvp.2024.105420","url":null,"abstract":"<div><div>Accurate prediction for fatigue crack propagation path is crucial for ensuring the safe operation of pipelines. In this paper, we present a novel method for predicting fatigue crack propagation path of surface cracks in pipelines with a ConvLSTM-based model. The ConvLSTM-based model effectively correlates crack propagation paths with fatigue cycles. Moreover, we have improved the method which transforms simulation results into the dataset for machine learning. The prediction results prove the excellent predictive power of the improved method. To further validate the robustness of our model, we test its predictive capabilities on cases not included in the dataset. The proposed method accurately forecasts the fatigue crack propagation path in pipelines without requiring re-modeling and re-computational attempts. The result indicates that the proposed method significantly reduces computational time compared to the finite element method.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105420"},"PeriodicalIF":3.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164435","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":"Influence of internal and external hydraulic pressures on torsional resistance of steel-concrete double skin composite tubes","authors":"Jian-Tao Wang,&nbsp;Kai-Lin Yang,&nbsp;Yang Yang","doi":"10.1016/j.ijpvp.2024.105424","DOIUrl":"10.1016/j.ijpvp.2024.105424","url":null,"abstract":"<div><div>In contrast to onshore engineering, the application of steel-concrete double skin composite tubes in deep-sea oil and gas pipelines involves exposure to high external hydrostatic pressure and internal hydrocarbon pressure. The composite effect under dual hydrostatic pressures exhibits unique characteristics distinct from those observed in terrestrial structures. The applicability of traditional land-based engineering design method to deep-water engineering remains uncertain. Therefore, this paper investigated the influence of dual hydraulic pressures on torsional behavior of concrete-filled double skin steel tubular (CFDST) members. The verified finite element (FE) model was employed to reveal the full-range torsional mechanism induced by hydraulic pressures. The mechanism analysis influenced by dual hydraulic pressures indicates that the existing pressures significantly enhance the confinement interactions between the double-skin steel tubes and the concrete, leading to an increased torsional resistance to the entire CFDST member. Subsequently, effects of material strengths of outer tube (<em>f</em>_yo), inner tube (<em>f</em>_yi) and concrete (<em>f</em>_c), diameter-to-thickness ratios of outer (<em>D</em>_o/<em>t</em>_o) and inner tubes (<em>D</em>_i/<em>t</em>_i), hollow ratios (<em>χ</em>), water depth (<em>H</em>) and internal pressure (<em>p</em>₃) are examined through parametric study, which reflects that higher hydraulic pressure will reduce the capacity of CFDST members with large hollow ratios, e.g., the capacity of <em>χ</em> = 0.867 versus that of <em>χ</em> = 0.714 at water depth <em>H</em> = 3200 m, and the internal pressure has a slight effect on the torsional performance. A new calculation approach for evaluating torsional resistance is introduced, integrating the effects of external and internal hydrostatic pressures, thereby informing the application and structural design of steel-concrete double skin composite tubes in subsea engineering.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105424"},"PeriodicalIF":3.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165504","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":"Probabilistic prediction of external corrosion fatigue life in buried steel pipes","authors":"J. Ramesh Babu,&nbsp;Pranav M. Karve,&nbsp;Sankaran Mahadevan","doi":"10.1016/j.ijpvp.2024.105415","DOIUrl":"10.1016/j.ijpvp.2024.105415","url":null,"abstract":"<div><div>This research investigates a methodology for probabilistic life prediction of buried steel pipelines subjected to external corrosion. A unified methodology is developed considering multiple stages of degradation related to external corrosion (due to soil) and fatigue. These stages include corrosion pit nucleation, pit growth, transition from pit to short crack, short crack growth, transition from short to long crack, stable long crack growth, and unstable fracture. The methodology is useful in obtaining stage-specific forecasts for the fatigue life of buried steel pipelines subjected to external pitting corrosion fatigue. State-of-the-art computational models are used to predict damage initiation and evolution at each stage. The variability in environmental, material, and loading parameters is propagated through these models to obtain a probabilistic estimate of the remaining service life (RSL) of the pipe. Insights from probabilistic RSL prediction highlight the influence of soil type and pipe coating material on corrosion fatigue life. Global sensitivity analysis is then employed to quantify the relative importance of environmental factors (pH, pipe/soil potential, and chloride concentration), material properties (threshold stress intensity factor), and the range of cyclic stress experienced by the pipe.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105415"},"PeriodicalIF":3.0,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution of residual stresses in 2205 DSS cruciform weld joints of filter press under water jet peening impact","authors":"Guangcheng Jia ,&nbsp;Yun Luo ,&nbsp;Hongxiang Zheng ,&nbsp;Jingyu Zang ,&nbsp;Wenchun Jiang","doi":"10.1016/j.ijpvp.2024.105413","DOIUrl":"10.1016/j.ijpvp.2024.105413","url":null,"abstract":"<div><div>Due to its excellent symmetry and superior mechanical performance, the cruciform welding joint is widely employed in various pressure equipment such as filter presses. The residual stress distribution in cruciform welded joints is complicated due to the variability in the number and sequence of weld passes, with significant stress concentration phenomena induced by geometric discontinuities, thereby impacting the structural durability of the joints. As a clean surface treatment technique, water jet peening (WJP) can effectively reduce surface residual stresses and improve surface performance, particularly suited for reinforcing the inaccessible welded joints. The cruciform weld joints contain four welds. The residual stresses be redistributed after each treatment on each weld. Improper WJP processes may affects the reduction effect of residual stresses of cruciform welded joints. In this paper, the evolution of residual stresses of 2205 Duplex Stainless Steel cruciform welded joints under WJP was investigated using numerical simulation and experiment. The mechanism of variation in residual stress distribution under different impact sequences were discussed. The results indicate that surface residual stresses in all four welds are effectively reduced by WJP. Among the different treatments, diagonal surface treatment (DST) demonstrates superior reduction in surface stress levels and overall stress distribution compared to single-sided treatment (SST) and sequential surface treatment (SeqST) and alternating surface treatment (AST) methods. The processing results of SeqST and AST exhibit minimal disparity. Considering both treatment effectiveness and cost, DST should be prioritized for engineering applications. This study provides valuable engineering guidance for the practical application of WJP in cruciform welded joint.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105413"},"PeriodicalIF":3.0,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143164440","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":"Baseline-free damage identification in clamped-clamped pipes based on regional resonance pairs","authors":"Mingyuan Wang,&nbsp;Yiqing Gu,&nbsp;Yingjie Fu,&nbsp;Yuankang Zhu,&nbsp;Jiuhong Jia,&nbsp;Shan-Tung Tu","doi":"10.1016/j.ijpvp.2024.105416","DOIUrl":"10.1016/j.ijpvp.2024.105416","url":null,"abstract":"<div><div>The significant challenge in many structural health monitoring (SHM) approaches is the reliance on baseline data. The critical importance of early damage detection is acknowledged to prevent catastrophic failures. In this work, a novel baseline-free vibrational method for assessing corrosion damage in pipes is introduced. The concept of regional resonance pairs (RRP) is presented for the detection, classification, localization, and quantification of damage without the need for baseline modal characteristics. The method effectiveness is demonstrated through experimental validation with clamped-clamped boundary conditions across various damage scenarios. Corrosion impacts are successfully identified using the RRP approach, with frequency deviations of active components maintained within ±5 %. Its sensitivity is sufficient to detect damage corresponding to a cross-sectional area loss of at least 4 %. The potential of RRP is a robust, noise-resistant tool for baseline-free damage detection in pipe systems. This method offers significant advantages in operational environments where baseline data may be unavailable or unreliable.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"214 ","pages":"Article 105416"},"PeriodicalIF":3.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165496","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}