International Journal of Pressure Vessels and Piping最新文献_第4页

Creep–fatigue behavior and damage analysis of long-serviced P92 martensitic steel under deep peak-shaving conditions P92马氏体钢在深削峰条件下蠕变疲劳行为及损伤分析

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-12-11 DOI: 10.1016/j.ijpvp.2025.105728

Qinghui Zhang , Baoyin Zhu , Xiao Jin , Dongfeng Li , Gaocan Luan , Shuitao Gu , Gongye Zhang , Hongjun Liu

Flexible operation for deep peak-shaving has shifted the degradation of main-steam piping from being creep-dominated to a pronounced creep-fatigue interaction. This study investigates the creep-fatigue behavior of long-serviced P92 steel taken from a main steam pipe after approximately 90,000 h in service at 605 °C. Strain-controlled creep-fatigue tests with varied strain amplitude, tensile hold time and strain ratio are conducted to characterize cyclic response. The results indicate that the material generally exhibits a three-stage cyclic softening behavior. Increasing strain amplitude and hold time significantly accelerates softening, enhances time-dependent strain accumulation and reduces life, whereas a higher strain ratio suppresses inelastic strain accumulation and improves life. A non-unified constitutive framework, combined with a strain energy density exhaustion model based on a cycle-by-cycle concept, successfully captures the observed cyclic responses and life trends. This study elucidates the competitive failure mechanisms of long-serviced P92 steel under creep-fatigue loading conditions, providing essential data and analytical methods for reliable engineering assessments.

深度调峰的灵活操作将主蒸汽管道的退化从蠕变为主转变为明显的蠕变-疲劳相互作用。本研究研究了从主蒸汽管道中提取的P92钢在605°C下使用约90,000小时后的蠕变疲劳行为。通过不同应变幅值、拉伸保持时间和应变比的应变控制蠕变疲劳试验来表征循环响应。结果表明，该材料总体上表现为三阶段循环软化行为。增加应变幅值和保持时间可显著加速软化，增加随时间变化的应变积累，降低寿命，而提高应变比可抑制非弹性应变积累，提高寿命。一个非统一的本构框架，结合基于循环概念的应变能密度耗尽模型，成功地捕获了观察到的循环响应和寿命趋势。本研究阐明了长期服役的P92钢在蠕变疲劳载荷条件下的竞争性失效机制，为可靠的工程评估提供了必要的数据和分析方法。

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引用次数: 0

A design approach for wire-wound ultra-high pressure vessels in isostatic pressing systems based on constant von Mises stress criterion 基于恒von Mises应力准则的等静压系统线绕超高压容器设计方法

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-12-11 DOI: 10.1016/j.ijpvp.2025.105730

Yubo Huang , Zhengchi Li , Zhoujin Lv , Wen Qi , Chenghong Duan , Bao Wang

The prestressed wire-winding technique is widely employed in the design of ultra-high pressure vessels for isostatic pressing equipment, with the primary objective of providing the cylindrical body with a prestress to enhance structural safety. Conventional design approaches are mostly based on the Tresca strength criterion, ensuring that the wound wire sustains a constant Tresca equivalent stress (i.e., constant shear stress) under working conditions. However, the Tresca theory is relatively conservative, which limits the full utilization of the mechanical properties of the wire material and fails to accurately characterize its failure behavior. In this study, a design method for constant von Mises stress winding was derived and refined based on the differential equations of mechanical equilibrium for the wire-wound layers. A power-law polynomial fitting of the stress distribution curve was further introduced to simplify the computational procedure. The proposed method is applicable to various types of wire-wound vessels, with R² exceeding 0.999 for the fitted results. A case study on a 600 MPa ultra-high pressure vessel was carried out to validate the effectiveness of the proposed design method through finite element simulations. The von Mises stresses of the wires under working condition were uniformly distributed, and the relative deviation from the designed values was less than 3.5 %. Compared with the constant shear stress winding approach, the constant von Mises stress design reduced the average design stress of the wire by 8 % and saved approximately 25 % of wire material under the same vessel configuration, demonstrating significant advantages in both performance and efficiency.

预应力钢丝缠绕技术广泛应用于等静压设备超高压容器的设计中，其主要目的是为圆柱体提供预应力，以提高结构的安全性。传统的设计方法大多基于Tresca强度准则，确保绕丝在工作条件下保持恒定的Tresca等效应力（即恒定剪切应力）。然而，Tresca理论相对保守，限制了线材力学性能的充分利用，无法准确表征线材的破坏行为。本文基于线绕层力学平衡的微分方程，推导并改进了恒von Mises应力绕组的设计方法。为了简化计算过程，进一步引入了应力分布曲线的幂律多项式拟合。该方法适用于各种类型的绕丝血管，拟合结果R2均超过0.999。以某600 MPa超高压容器为例，通过有限元仿真验证了所提设计方法的有效性。试件在工作状态下的von Mises应力分布均匀，与设计值的相对偏差小于3.5%。与恒定剪切应力缠绕方法相比，在相同容器配置下，恒定冯米塞斯应力设计将线材的平均设计应力降低了8%，节省了约25%的线材，在性能和效率方面都具有显著优势。

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引用次数: 0

Inferring mechanical behavior from physical properties based on multiscale microstructure evolution and deep learning 基于多尺度微观结构演化和深度学习的物理性质推断力学行为

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-12-09 DOI: 10.1016/j.ijpvp.2025.105729

Menglin Gao , Shengjun Xia , Chunfa Huang , Xing Hu , Shuaiheng Liang , Wenlu Zhang , Ziqiang Wang , Wei Liu , Qiulin Li

In-service assessment of structural material degradation, whose essence is to infer mechanical behavior from physical properties, is crucial for infrastructure safety. Machine learning offers a promising approach for establishing quantitative relationships between physical and mechanical properties, but its application in specific engineering fields is challenged by insufficient experimental data. Here, we propose a novel data augmentation method based on multiscale microstructure evolution. Specifically, high-throughput scanning electron microscopy combined with a U-Net model was employed to quantitatively analyze precipitate evolution during creep degradation. Additionally, cross-scale characterization techniques were integrated to acquire grain size and dislocation density information. Computational models correlating microstructural features with physical and mechanical properties were developed to enable data augmentation. Finally, we present a multi-fidelity neural network that integrates generated low-fidelity data with experimental high-fidelity data, achieving high prediction accuracy and generalizability. This work provides a new framework for developing in-service assessments of material properties, demonstrating broad applicability, while acknowledging that the current high-fidelity dataset is limited and future data will further strengthen statistical robustness.

结构材料在役退化评估对基础设施安全至关重要，其本质是通过物理性能推断力学行为。机器学习为建立物理和机械性能之间的定量关系提供了一种很有前途的方法，但其在特定工程领域的应用受到实验数据不足的挑战。本文提出了一种基于多尺度微观结构演化的数据增强方法。具体而言，采用高通量扫描电镜结合U-Net模型定量分析蠕变降解过程中的沉淀演变。此外，还集成了跨尺度表征技术来获取晶粒尺寸和位错密度信息。开发了将微观结构特征与物理和机械性能相关联的计算模型，以增强数据。最后，我们提出了一种多保真度神经网络，将生成的低保真度数据与实验的高保真度数据相结合，实现了较高的预测精度和泛化能力。这项工作为开发材料性能的在职评估提供了一个新的框架，展示了广泛的适用性，同时承认当前的高保真数据集是有限的，未来的数据将进一步加强统计稳健性。

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引用次数: 0

A modified Johnson-Cook constitutive model for austenitic stainless steel under wide cryogenic temperature and strain rate ranges 奥氏体不锈钢在大低温和应变速率下的改进Johnson-Cook本构模型

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-12-04 DOI: 10.1016/j.ijpvp.2025.105725

Xinbo Yu , Xinhua Wang , Xiaoqiu Ma , Lianhua Ma , Biao Wang , Zisheng Guo , Qinmeng Wang

The dynamic mechanical properties of austenitic stainless steels (ASS) for cryogenic liquid rocket engine applications exhibit strong temperature and strain rate dependence. However, traditional quasi-static constitutive frameworks are inadequate for characterizing the rate-sensitive properties of these materials at cryogenic temperatures. Hence, a dynamic constitutive model incorporating wide cryogenic temperature and strain rate effects is essential for precise ASS mechanical behavior prediction. To overcome the inherent limitations of the classical JC model in describing phase transformation strengthening, this study developed an improved JC constitutive model based on the rule of mixtures. This model explicitly incorporates the martensite volume fraction as a key internal variable into the flow stress equation, thereby simultaneously characterizing strain rate effects and phase transformation-induced hardening within a unified theoretical framework. Subsequently, the proposed model was rigorously validated using 42 experimental tensile datasets from various ASS under uniaxial tensile loading, demonstrating consistent accuracy across wide temperature ranges (77–298K), large pre-strains (up to 22 %), and broad strain rates (10⁻³–3270s⁻¹). Finally, to evaluate the effectiveness of the new model in numerical simulations, the modified JC constitutive model was embedded into the commercial finite element package ABAQUS via the explicit user subroutine VUMAT interface. The numerical simulations successfully captured the dynamic constitutive behavior of ASS under wide temperatures (110–298K) and high strain rates (1550 s⁻¹ and 3270 s⁻¹). The results demonstrate that the improved JC constitutive model effectively characterizes the mechanical behavior of ASS across wide temperature and strain rate ranges. This work provides a physically motivated and phenomenological framework that paves the way for the future lightweight design and safety assessment of cryogenic propellant pipes and tanks in liquid rocket engines.

低温液体火箭发动机用奥氏体不锈钢的动态力学性能表现出强烈的温度和应变速率依赖性。然而，传统的准静态本构框架不足以表征这些材料在低温下的速率敏感特性。因此，一个包含广泛低温和应变率效应的动态本构模型是精确预测ASS力学行为的必要条件。为了克服经典JC模型在描述相变强化时的固有局限性，本文基于混合规律建立了改进的JC本构模型。该模型明确地将马氏体体积分数作为一个关键的内部变量纳入流动应力方程，从而在统一的理论框架内同时表征应变速率效应和相变诱发硬化。随后，使用来自不同ASS的42个单轴拉伸载荷实验数据集对所提出的模型进行了严格验证，在宽温度范围（77-298K）、大预应变（高达22%）和宽应变率（10−3-3270s−1）下证明了一致的准确性。最后，为了评估新模型在数值模拟中的有效性，将修正后的JC本构模型通过显式用户子程序VUMAT接口嵌入到商用有限元软件包ABAQUS中。数值模拟成功地捕获了宽温度（110 ~ 298k）和高应变速率（1550 s−1和3270 s−1）下的动态本构行为。结果表明，改进的JC本构模型能有效表征宽温度和应变速率范围内的as力学行为。这项工作提供了一个物理动机和现象学框架，为未来液体火箭发动机中低温推进剂管道和储罐的轻量化设计和安全评估铺平了道路。

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引用次数: 0

Creep-fatigue behavior and life prediction of Inconel 617 alloy at 700 °C 700℃下Inconel 617合金蠕变疲劳行为及寿命预测

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-12-04 DOI: 10.1016/j.ijpvp.2025.105717

Jingyu Yang , Fang Wang , Yiming Zheng , Kang Wang , Jingtai Yu , Bingbing Li

Creep-fatigue tests were conducted on Inconel 617 alloy at 700 °C. Effects of strain hold modes including tension hold (TH), compression hold (CH), and tension-compression mixed hold (TC) were studied at different strain amplitudes. The material consistently presented the two-stage hardening and a final rapid softening behavior under different hold modes. Under different hold modes, the dynamic strain aging was most pronounced in TH mode, weaker in CH mode, and weakest in TC mode. This variation stemed from solute atom diffusion and dislocation pinning-unpinning. The grain diameters in post-test specimens under different hold modes followed the order: TH > TC > CH, which was related with the occurrence of grain boundary migration and dynamic recrystallization. The oxidation damage differences characterized by the thickness of oxide layers on the longitudinal section were identified to follow the sequence of TC > TH > CH. Correspondingly, the embrittled grain boundaries caused by the oxidation damage led to the intergranular crack initiation in the TH and TC tests, while the crack initiated in the transgranular behavior in the CH tests. Based on the experimentally observed difference between tension and compression hold damage, damage mode factors were proposed to reasonably evaluate the differences in damage contribution of various strain hold modes. Furthermore, the factors were introduced to the classical time fraction model to achieve a significant improvement in life prediction, with all life data falling into the scatter band of 1.5.

对Inconel 617合金进行了700℃蠕变疲劳试验。在不同的应变幅值下，研究了拉伸保持（TH）、压缩保持（CH）和拉压混合保持（TC）三种应变保持方式的影响。在不同保温方式下，材料均呈现两阶段硬化和最终快速软化的特征。在不同保持模式下，动态应变老化在TH模式下最明显，CH模式下较弱，TC模式下最弱。这种变化源于溶质原子扩散和位错的钉-解钉。不同保温方式下试样的晶粒直径大小顺序为：TH >； TC >； CH，这与晶界迁移和动态再结晶的发生有关。以纵截面氧化层厚度为特征的氧化损伤差异遵循TC >； TH >； CH的顺序。相应地，氧化损伤引起的脆化晶界在TH和TC试验中导致晶间裂纹萌生，而在CH试验中裂纹萌生于穿晶行为。基于实验观察到的拉压保持损伤差异，提出了损伤模式因子，以合理评价不同应变保持模式的损伤贡献差异。在经典时间分数模型中引入因子，寿命预测得到显著改善，寿命数据均落在1.5的散点带内。

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引用次数: 0

Buckling design of corrugated cylindrical hulls with variable wall thickness under uniform external pressure–Simulation and validation 等外压作用下变壁厚波纹圆柱壳屈曲设计仿真与验证

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-11-27 DOI: 10.1016/j.ijpvp.2025.105709

Xu Zhang , Xing He , Kechun Shen , Xinhu Zhang , Qiaogao Huang , Guang Pan

Accurately predicting the buckling behavior of cylindrical hulls under uniform external pressure remains a significant challenge. While the perturbation probing method shows promise for determining rational design loads for such structures, it has not been thoroughly investigated. This study proposes a deterministic buckling design method based on the perturbation concept, introducing an artificial imperfection pattern via a single radial perturbation displacement. We applied this method to corrugated cylindrical hulls with variable wall thickness under uniform external pressure to validate the rationality of the hull design. Furthermore, the impact of manufacturing geometric imperfections on hull buckling behavior was revisited, demonstrating that the proposed method provides robust design buckling loads. Finally, a comparative analysis was performed between corrugated cylindrical hulls and conventional cylindrical hulls of equivalent theoretical mass, focusing on their buckling responses under various geometric imperfections. The results indicate that the corrugated cylindrical hulls achieve higher design buckling loads and exhibit lower defect sensitivity compared to their conventional counterparts. The proposed buckling design method also provides valuable insights for improving the design of other stiffened cylindrical hulls.

准确预测均匀外压作用下圆柱形船体的屈曲行为仍然是一个重大挑战。虽然摄动探测方法显示了确定这种结构的合理设计载荷的希望，但它尚未得到彻底的研究。本文提出了一种基于微扰概念的确定性屈曲设计方法，通过单个径向微扰位移引入人工缺陷模式。将该方法应用于变壁厚的波纹圆柱船体在均匀外压作用下，验证了船体设计的合理性。此外，研究了制造几何缺陷对船体屈曲行为的影响，表明该方法提供了稳健的设计屈曲载荷。最后，对具有等效理论质量的波纹圆柱形壳体与常规圆柱形壳体进行了对比分析，重点研究了波纹圆柱形壳体在不同几何缺陷下的屈曲响应。结果表明，与传统船体相比，波纹圆柱形船体具有更高的设计屈曲载荷和更低的缺陷敏感性。所提出的屈曲设计方法也为改进其他加劲圆柱船体的设计提供了有价值的见解。

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引用次数: 0

A time-dependent design evaluation methodology for high-temperature class 2 piping in TMSR TMSR高温2级管道的时变设计评价方法

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-11-27 DOI: 10.1016/j.ijpvp.2025.105710

Wei Gong , Xiao-Yan Wang , Wei Wang , Zhi-Jun Li , Xiao Wang

The high-temperature nuclear piping systems in thorium molten salt reactors (TMSR) face significant challenges due to long-term creep effects under elevated temperatures during long-term operation, while existing codes for high-temperature nuclear Class 2 piping exhibit deficiencies in engineering applicability. This study proposes a methodology for evaluating time-dependent creep damage of TMSR high temperature class 2 piping. This methodology addresses the limitations of existing codes by overcoming the excessive conservatism of the RCC-MRx code and the inadequate consideration of long-term creep damage in the ASME code for high-temperature class 2 piping. By providing a refined analytical framework for integrity evaluation, this approach enables more accurate design and structural integrity evaluation of high-temperature piping systems in TMSR, thereby establishing a robust theoretical foundation and technical guidance for ensuring their long-term operational safety.

钍熔盐堆高温核管道系统在长期运行过程中，由于高温下的长期蠕变效应，面临着重大挑战，而现有的高温核2级管道规范在工程适用性方面存在不足。本文提出了一种评估TMSR高温2类管道蠕变损伤的方法。该方法通过克服RCC-MRx规范的过度保守性和ASME规范中对高温2级管道的长期蠕变损伤考虑不足，解决了现有规范的局限性。该方法为TMSR高温管道系统的设计和结构完整性评估提供了精细化的分析框架，为TMSR高温管道系统的长期安全运行奠定了坚实的理论基础和技术指导。

引用次数: 0

Behavior of API 5L X65 pipeline steel in underwater wet welding conditions by applying temper bead welding technique API 5L X65管道钢在水下湿焊条件下的回火焊性能

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-11-20 DOI: 10.1016/j.ijpvp.2025.105707

Jacek Tomków, Grzegorz Rogalski

In this paper the behavior of the API 5L X65 pipeline steel during underwater wet welding with application of temper bead welding (TBW) was investigated. For tests, pad welded sample and T-joints were welded. All specimens were performed by manual metal arc welding (MMA) method with the usage of rutile covered electrodes. For investigations, the non-destructive (NDT) tests – visual test, and destructive tests – metallographic macro- and microscopic, Vickers HV10 hardness measurements and chemical analysis by Energy Dispersive Spectroscopy (EDS) were used. Performed experiments state that API 5L X65 steel could be welded in underwater conditions by wet welding method. Proposed technique provides for tempering the brittle microstructures in the heat-affected zone (HAZ). Moreover, it was proved that TBW allows lowering susceptibility to cold cracking, by decreasing the hardness by 30–50 HV10.

本文研究了API 5L X65管线钢在水下湿焊回火焊（TBW）中的焊接行为。试验采用垫焊试样和t形接头进行焊接。所有试样均采用金红石覆盖电极的手工金属电弧焊（MMA）方法。为了进行研究，使用了非破坏性（NDT）测试-视觉测试，破坏性测试-金相宏观和微观，维氏HV10硬度测量和能量色散光谱（EDS）化学分析。试验表明，采用湿焊方法可以在水下条件下焊接API 5L X65钢。该技术可用于回火热影响区（HAZ）的脆性组织。此外，通过将硬度降低30-50 HV10，证明TBW可以降低对冷裂的敏感性。

引用次数: 0

Comparison of structural weight for tandem-type cryogenic liquid hydrogen fuel tanks with the same internal volume considering self-pressurization 考虑自增压的等内容串联型低温液氢燃料箱结构重量比较

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-11-19 DOI: 10.1016/j.ijpvp.2025.105706

Dongkuk Choi , Sooyong Lee , Hak Gu Lee , Sang-Woo Kim , Moonsung Cho

This paper is a study of self-pressurization behavior and tank weight comparisons according to the dimension of cryogenic LH₂ fuel tanks. To compare the self-pressurization and structural weight of cryogenic LH₂ fuel tanks, thermal and structural analyses were performed on a tandem-type tank with hemispherical heads. The maximum internal pressure generated in the tank was estimated by predicting the self-pressurization behavior of LH₂, and structural analysis was carried out by applying maximum pressure as a structural load. The structural weight of the tank was predicted by designing the thickness of the tank wall to withstand the maximum pressure. The existence of a non-spherical tank shape dimension condition that minimizes the structural weight of a tandem-type liquid hydrogen fuel tank was confirmed. This condition includes insulation, though dependent on the ratio of the tank radius to the cylinder length as well as tank design pressure condition.

本文研究了低温LH2燃料箱的自增压性能，并根据燃料箱的尺寸对燃料箱重量进行了比较。为了比较低温LH2燃料箱的自增压性能和结构重量，对半球形封头串联燃料箱进行了热分析和结构分析。通过预测LH2的自增压行为，估算罐内产生的最大内压，并将最大内压作为结构荷载进行结构分析。通过设计罐壁承受最大压力的厚度来预测罐的结构重量。验证了串联型液氢燃料箱存在使结构重量最小的非球形燃料箱形状尺寸条件。该条件包括绝缘，但取决于罐半径与圆柱体长度的比率以及罐的设计压力条件。

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引用次数: 0

Improved J and COD estimation equations covering long circumferential through-wall cracks in pipes: I- bending 改进的J和COD估算方程，包括管道长周向穿透壁裂纹：弯曲

IF 3.5 2区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Pressure Vessels and Piping

Pub Date : 2025-11-16 DOI: 10.1016/j.ijpvp.2025.105705

Hye-Won Jeong , Jae-Yoon Kim , Yun-Jae Kim , Nam-Su Huh , Do-Jun Shim

For LBB analysis of small-diameter piping in small modular reactors, elastic-plastic J and COD needs to be estimated potentially for long circumferential through-wall cracks larger than 50 % of the circumference. This paper proposes improved J and COD estimation equations for circumferential thorough-wall cracked pipes in bending, covering short-to-long cracks over 50 % of the circumference. The proposed equations are based on extensive FE analysis. Comparisons with FE J and COD results confirmed that the proposed equations improves the accuracy of estimated J and COD not only for short cracks but also for long cracks, compared to existing estimation equations.

对于小型模块化反应器中小直径管道的LBB分析，需要对大于周长50%的长周向穿壁裂纹进行潜在的弹塑性J和COD估算。本文提出了一种改进的周向贯通壁裂纹管弯曲J和COD估算方程，该方程涵盖了周长50%以上的短到长裂纹。所提出的方程是基于广泛的有限元分析。与FE - J和COD计算结果的比较表明，与现有估算方程相比，所提出的方程不仅提高了短裂纹的J和COD估算精度，而且提高了长裂纹的J和COD估算精度。

引用次数: 0