International Journal of Pressure Vessels and Piping最新文献

{"title":"A new shakedown evaluation method for design of thermo-expanded piping-vessel combined system","authors":"Zhengchi Li ,&nbsp;Chenghong Duan ,&nbsp;Xiangpeng Luo ,&nbsp;Weimin Wang ,&nbsp;Mingwan Lu ,&nbsp;Zhiwei Chen","doi":"10.1016/j.ijpvp.2025.105604","DOIUrl":"10.1016/j.ijpvp.2025.105604","url":null,"abstract":"<div><div>Due to elastic follow-up, the stresses in vessels caused by the connected thermo-expanded piping are considered as load-controlled stresses, and evaluated by using the primary stress criterion in current codes. However, it is well-known that this approach is conservative. A new shakedown evaluation method for thermo-expanded piping-vessel combined system is proposed in this paper by comparing three calculation methods of shakedown loads (cyclic elastic-plastic finite element method, lower-bound shakedown theorem method, and dual limit load method) and three safety evaluation criteria (primary stress criterion, 3S criterion, and double elastic limit load criterion). The proposed method adopts integral elastic stress analysis and the double elastic limit load criterion, which not only safely prevents excessive plastic deformation in vessels caused by the elastic follow-up of piping, but also significantly enhances the allowable load of the structure. Examples demonstrate that current codes for evaluating thermo-expanded piping-vessel system are overly conservative.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105604"},"PeriodicalIF":3.0,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614254","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":"Long-term thermal aging experiment on cast austenitic stainless steel and its effects on the parameters of nonlinear ultrasonic measurement","authors":"Ming Gao ,&nbsp;Yinqiang Qu ,&nbsp;Ming Du ,&nbsp;Hao Chang ,&nbsp;Cuixiang Pei ,&nbsp;Qilai Zhou ,&nbsp;Pan Qi ,&nbsp;Zhenmao Chen","doi":"10.1016/j.ijpvp.2025.105603","DOIUrl":"10.1016/j.ijpvp.2025.105603","url":null,"abstract":"<div><div>Cast austenitic stainless steel is applied as the material for the primary coolant piping in pressurized water reactor (PWR) type nuclear power plants (NPP). Long-term exposure to high working temperatures induces thermal aging embrittlement, which raises safety concerns about NPP. In this study, accelerated thermal aging at 400 °C of 316L austenitic stainless steel was conducted for a maximum duration of 12,000 h. Nonlinear ultrasonic measurement was employed to explore the material degradation after thermal aging. It was found that the nonlinear parameter exhibited an initial increase, reaching a peak value at approximately 5000 h, followed by a decrease. This behavior correlated with microstructural transformations, such as spinodal decomposition and G-phase precipitation. The results of mechanical property tests showed a significant reduction in impact-absorbed energy and fluctuations in tensile strength. Notably, the variation trend of the nonlinear parameter showed a certain degree of correlation with that of the tensile strength. These findings suggest that nonlinear ultrasonic testing is an explorative method for evaluating the thermal aging embrittlement of stainless steel. It can serve as a reference for developing predictive models that correlate nondestructive testing parameters with mechanical properties.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105603"},"PeriodicalIF":3.0,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614214","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":"An advanced creep law for large stress and temperature ranges, derived from the Larson-Miller master curve concept","authors":"R.W. Schirmer,&nbsp;S. Roth,&nbsp;M. Abendroth,&nbsp;B. Kiefer","doi":"10.1016/j.ijpvp.2025.105585","DOIUrl":"10.1016/j.ijpvp.2025.105585","url":null,"abstract":"<div><div>Accurate determination of creep properties is crucial for predicting the long-term performance of components in high-temperature environments. Most reliable material properties can be obtained by conducting creep experiments under the specific conditions experienced by the component in service. However, these experiments often require significantly more time than is typically available for component design. An alternative approach involves conducting short-term creep experiments and extrapolating the results to estimate the component’s lifetime, albeit with reduced precision. Although the widely used <span>Norton</span> law effectively predicts creep behavior within narrow stress ranges, it overestimates the creep life when extrapolating from short-term data. To overcome this limitation, the <span>Larson-Miller</span> time-temperature-parameter technique (LM-TTP) is revisited, offering improved extrapolation accuracy by trading time with temperature, so that long-term creep behavior can be predicted by use of short-term data obtained at higher temperatures. However, to formulate a creep law in terms of stress vs. creep strain rate, an additional relation of the <span>Larson-Miller</span> parameter (LMP) to the applied stress is needed.</div><div>This paper presents the derivation of a creep law by introducing a novel stress function to the LM-TTP. Building on the work of <span>Boček</span> and <span>Wolf</span> (1983), the proposed creep law demonstrates its superior extrapolation capabilities, aligning with fundamental experimental observations. Furthermore, the implementation of the proposed creep law into the Finite Element Analysis (FEA) software <em>Abaqus</em> is discussed, providing a ready-to-use <em>CREEP</em> subroutine for general application.</div><div>Two parameter identification strategies are suggested, with one requiring no simulations for inter- or extrapolation of rupture times, making it particularly appealing for preliminary studies and industrial applications. The alternative strategy utilizes nonlinear optimization techniques for inverse parameter identification. The results of the identification procedures are compared based on uniaxial experiments of the heat-resistant steel P91 (1.4903).</div><div>Finally, the extrapolation capabilities of the proposed creep law are compared to the <span>Norton</span> law using a creep dataset of the heat-resistant steel 1.4948. Even with experimental data restricted to rupture times less than 100 h, the proposed model exhibits the potential for accurate extrapolation to about 3.8 years, with an error margin of less than 1%, showcasing its reliability in predicting long-term creep behavior.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105585"},"PeriodicalIF":3.0,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614255","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":"Investigation of crack initiation characteristic of HT200 plate specimen with an inclined surface crack under uniaxial compression","authors":"Qi Pei ,&nbsp;Tian-Hao Ma ,&nbsp;Li-Zhu Jin ,&nbsp;Fei Liang ,&nbsp;Chang-Yu Zhou","doi":"10.1016/j.ijpvp.2025.105602","DOIUrl":"10.1016/j.ijpvp.2025.105602","url":null,"abstract":"<div><div>The brittle fracture behavior of mixed-mode surface crack under compressive loading is an important issue in fracture mechanics. This paper investigates the crack initiation angle, propagation path, and fracture mechanism of HT200 grey cast iron under uniaxial compression through experimental studies, and employs three modified fracture criteria incorporating <em>T</em>-stress to predict the crack initiation angle. The digital image correlation (DIC) system is used to analyze the strain field at the crack tip, which is compared with that obtained from finite element simulation. Besides, the fracture surface is observed by scanning electron microscope (SEM). A novel method of 3D laser scanning is adopted to scan fractured specimens and measures the out-of-plane crack initiation angle along internal surface crack front. The results indicate that typical shear fracture dimples are observed in fracture surface. The generalized maximum tangential stress (GMTS) criterion is applicable to the prediction of in-plane crack initiation angle, while the generalized maximum tangential strain energy density (GMTSED) criterion is suitable to the prediction of out-of-plane initiation angle along the crack front.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105602"},"PeriodicalIF":3.0,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572645","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":"Prediction of non-proportionality in 3D-6D strain history using the 3D Area Swept by First Principal Strain method and development of a new multiaxial fatigue life prediction model","authors":"Lajia Dong,&nbsp;Jingjie Chen,&nbsp;Gang Liu","doi":"10.1016/j.ijpvp.2025.105600","DOIUrl":"10.1016/j.ijpvp.2025.105600","url":null,"abstract":"<div><div>This paper studies the area swept by the first principal strain in three-dimensional (3D) principal strain space and to establish a method, termed the 3D Area Swept by First Principal Strain (ASFPS) method, for predicting the non-proportionality of 3D-6D loading history. Unlike traditional methods that maintain a consistent strain level by controlling the same equivalent strain to investigate non-proportionality, the 3D ASFPS method achieves the uniform strain level by controlling the same maximum first principal strain to study non-proportionality. This method provides a more intuitive description of the variations in both magnitude and direction of the first principal strain in the 3D principal strain space, offering a clearer explanation of the effect of non-proportional additional hardening resulting from changes in the principal axes of strain. Subsequently, we successfully completed the development of the 3D ASFPS method to the 2D ASFPS method that can effectively predict the non-proportionality of the 2D strain history. And a new multiaxial low cycle fatigue life prediction model based on the maximum first principal strain was proposed and verified. The new model, compared to other models, not only demonstrates better performance in predicting materials but also has significant advantages of a concise form and a straightforward computation. Furthermore, our method and model can predict non-proportionality and fatigue life within the fatigue failure zone of engineering structures solely by analyzing variations in strain states, even when loading path is uncertain. This indicates significant potential for practical applications in engineering.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105600"},"PeriodicalIF":3.0,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571214","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":"Analysis on mechanical characteristics of multi-layer bellows considering contact nonlinearity","authors":"Tianhao Meng ,&nbsp;Zhong Luo ,&nbsp;Linhong Song ,&nbsp;Qiu Li ,&nbsp;Baolong Shi ,&nbsp;Yun Li","doi":"10.1016/j.ijpvp.2025.105601","DOIUrl":"10.1016/j.ijpvp.2025.105601","url":null,"abstract":"<div><div>There exists a lot of research on the mechanical properties of bellows. To the best of our knowledge, these studies mainly focus on the axial mechanical properties. Little research on the lateral mechanical properties of bellows has been performed considering the nonlinear features. In this paper, the strength and lateral stiffness characteristics of bellows with different interlayer contacts are simulated by the parametric variation of interlayer friction coefficient. The validity of the finite element model and the shortcomings of the existing analysis are confirmed by experimental tests. The results show that the change of interfacial friction has little influence on the structural strength and lateral stiffness of different layered structures. Moreover, both numerical simulations and experimental measurements demonstrate consistent nonlinear stiffness softening patterns, with stiffness behavior returning from linear process to linear after undergoing a nonlinear transition under displacement-controlled loading.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105601"},"PeriodicalIF":3.0,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144562788","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":"Hydrogen embrittlement susceptibility of various pipeline materials exposed to gaseous hydrogen","authors":"Huyue Wang ,&nbsp;Hongliang Ming ,&nbsp;Jianqiu Wang ,&nbsp;Wei Ke ,&nbsp;En-Hou Han","doi":"10.1016/j.ijpvp.2025.105599","DOIUrl":"10.1016/j.ijpvp.2025.105599","url":null,"abstract":"<div><div>In this study, a comprehensive investigation was conducted on the hydrogen embrittlement (HE) behaviors of hydrogen transportation pipeline materials. The differences in HE susceptibility were quantitatively compared using the hydrogen embrittlement susceptibility index (HEI), and the relationship between chemical composition, microstructure of materials, and hydrogen-induced failure behaviors was analyzed in detail. The presence of hydrogen significantly degrades the elongation at fracture (EL) and reduction in area (RA) of the material. As the grade of material strength increases, the material's susceptibility to HE continues to rise. Notably, the X52 steel selected for this study, continuous and oriented pearlite-banded structures were observed on the RD-TD and RD-LD planes. Such microstructural characteristics may enhance the susceptibility to HE. Additionally, it is hypothesized that due to the conflicting influences of grain boundary surface area per unit volume (S_V) and density of triple junctions, the impact of grain size on the HE susceptibility of 20# and X42 steels may not differ significantly.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105599"},"PeriodicalIF":3.0,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517615","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":"Fatigue performance of corroded concrete pipes with void defects under coupled traffic-groundwater loading","authors":"Yulin Yang ,&nbsp;Bin Li ,&nbsp;Hongyuan Fang ,&nbsp;Danyang Di ,&nbsp;Niannian Wang ,&nbsp;Xueming Du ,&nbsp;Kejie Zhai","doi":"10.1016/j.ijpvp.2025.105595","DOIUrl":"10.1016/j.ijpvp.2025.105595","url":null,"abstract":"<div><div>The coexistence of various defects in concrete drainage pipelines under long-term coupling effects in complex service environments is notably prevalent. However, the fatigue performance of these pipelines under the combined influence of complex loads and multiple defects remain unclear. This study conducted full-scale fatigue experiments on concrete pipes with composite defects, including corrosion and voids, in an indoor model box under the combined fatigue traffic loading and groundwater. The circumferential strains at critical positions of the pipe with respect to the fatigue load cycles were analyzed, and the fatigue damage characteristics were revealed by monitoring the crack propagation. Subsequently, refined 3D FE numerical models were constructed and validated to analyze the effects of soil covering depths, groundwater levels, and the geometric parameters of corrosion and void defects on concrete pipe fatigue life. The results reveal that the fatigue mode of the concrete pipes is tensile failure at the bell's inner crown. The progression of damage through fatigue loading can be categorized into five stages: slow increase in strain, rapid increase in strain, axial crack propagation, radial crack propagation, and crack penetration. Parametric analysis indicates that an increase in soil cover depth and groundwater level can effectively mitigate stress concentration and extend fatigue life. Corrosion and void defects exhibit nonlinear effects on the fatigue performance of concrete pipes. Larger corrosion length, corrosion depth, void depth, and void length result in reduced fatigue life. Moreover, both corrosion width and void length show critical threshold values, with different variation trends before and after these thresholds.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105595"},"PeriodicalIF":3.0,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144510818","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 welding joint configurations on the structural creep-fatigue behaviours under cyclic thermomechanical loading conditions","authors":"Tiansheng Guan ,&nbsp;Xiaoxiao Wang ,&nbsp;Haofeng Chen ,&nbsp;Fuzhen Xuan ,&nbsp;Guodong Jia","doi":"10.1016/j.ijpvp.2025.105597","DOIUrl":"10.1016/j.ijpvp.2025.105597","url":null,"abstract":"<div><div>Under complex thermomechanical loading, the weld zone is a critical location in Grade 91 steel high-temperature pressurised components, where the geometrical features of welded joints significantly influence the creep-fatigue interaction failure mechanisms. This study aims to investigate the effect of welding types on the creep-fatigue behaviours of pressurised structures, with two types of Grade 91 steel welded joints analysed by the extended Direct Steady Cycle Analysis (eDSCA) under the Linear Matching Method (LMM) framework, which accounts for the interaction between creep and cyclic plasticity. The results demonstrate that welding types have a significant effect on the local mechanical behaviour of the structure, primarily in different distributions and accumulations of creep strain near the heat-affected zone and fusion line. The dominant factors contributing to creep-fatigue damage are identified to reflect the failure under cyclic thermal loading and dwell periods. Furthermore, based on failure life under various loading conditions, the three-dimensional design contour plot and fitting formulas for creep-fatigue life prediction are constructed, providing new insight into the precise design and safety assessment of welded structures.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105597"},"PeriodicalIF":3.0,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513936","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":"Investigation of arc interruption mechanisms and stability optimization strategies in Tri-Arc Twin-Wire GMAW","authors":"Pu Zhong,&nbsp;Haihua Liu,&nbsp;Liangyu Li,&nbsp;Guochun Ren,&nbsp;Dongbo Guo","doi":"10.1016/j.ijpvp.2025.105596","DOIUrl":"10.1016/j.ijpvp.2025.105596","url":null,"abstract":"<div><div>The Tri-Arc Twin-Wire welding has demonstrated promising potential for industrial applications due to its high deposition efficiency and low heat input characteristics. However, the inherent instability of coupled arcs frequently induces arc interruption during welding processes. This study systematically investigates the arc interruption phenomenon through synchronized high-speed imaging and arc signal monitoring. The fundamental mechanism was revealed to stem from the intrinsic contradiction between the symmetric configuration of welding torch structure/process parameters and the asymmetric nature of actual welding process. Based on this finding, two optimization strategies were developed: asymmetric torch structural modification and asymmetric parameter regulation. Experimental validation confirmed the effectiveness of these optimization approaches. Comprehensive comparisons of arc interruption frequency, weld penetration depth, and Largest Lyapunov Exponent (LLE) of current signals demonstrated that three asymmetric optimization methods - asymmetric torch configuration (2 mm extension of contact tip for leading wire), asymmetric wire feed speed (0.2 m/min reduction for trailing wire), and asymmetric duty cycle (49 %) - effectively reduced arc interruption occurrences and achieved more uniform weld penetration, the LLE decreased from 0.80069 before optimization to a minimum of 0.26647. Collectively provide compelling evidence that the arc stability has been significantly enhanced. These findings provide theoretical and methodological references for optimizing Tri-Arc Twin-Wire welding processes and equipment modifications.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":"218 ","pages":"Article 105596"},"PeriodicalIF":3.0,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491116","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}