International Journal of Mechanical Sciences最新文献_第6页

Random aeroelastic vibration of nonlinear metamaterial supersonic plates 非线性超材料超声速板的随机气动弹性振动

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-10 DOI: 10.1016/j.ijmecsci.2025.110371

Peng Sheng, Bing Hu, Xin Fang, Jihong Wen

{"title":"Random aeroelastic vibration of nonlinear metamaterial supersonic plates","authors":"Peng Sheng, Bing Hu, Xin Fang, Jihong Wen","doi":"10.1016/j.ijmecsci.2025.110371","DOIUrl":"10.1016/j.ijmecsci.2025.110371","url":null,"abstract":"<div><div>High-speed aircraft generally endure complex and random vibration environments, thus mitigating random vibrations in the wing is critical to ensuring flight safety. Nonlinear acoustic metamaterials (NAM) provide efficient ways for structural vibration reduction. This paper investigates the random aeroelastic vibration of a supersonic NAM wing plate, which has never been studied. Based on a theoretical model combining mode superposition and modified third-order piston theory, extensive numerical simulations and statistical analyses are performed to show the aeroelastic properties of pure plate, linear and nonlinear metamaterial plates. The results indicate that, under broadband random excitation, the mean value, standard deviation, and maximum peak value of the time-domain displacement and velocity responses of the NAM plate are significantly reduced by >50 %, demonstrating superior vibration reduction capabilities compared to the linear metamaterial plate. The parameter analysis reveals the influence regularities of aerodynamic and structural parameters on the random vibration reduction properties of the NAM plate. Furthermore, we design the NAM plate composed of double frequency resonators, which exhibits superior reduction effects on broadband random vibration under low damping condition. This research provides valuable insight into the aeroelastic vibration control of supersonic wings in complex aerodynamic environments, and promotes the application of strongly nonlinear metamaterials.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"297 ","pages":"Article 110371"},"PeriodicalIF":7.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic characterization of tool-chip contact area and chip form 刀具-切屑接触面积和切屑形态的动态特性

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-10 DOI: 10.1016/j.ijmecsci.2025.110368

Xiaole Hao, Zhaocheng Wei, Xiuru Li, Xueqin Wang, Hongxia Li

{"title":"Dynamic characterization of tool-chip contact area and chip form","authors":"Xiaole Hao, Zhaocheng Wei, Xiuru Li, Xueqin Wang, Hongxia Li","doi":"10.1016/j.ijmecsci.2025.110368","DOIUrl":"10.1016/j.ijmecsci.2025.110368","url":null,"abstract":"<div><div>This study proposes an experimental data processing technique integrating micro-CT scanning and high-speed imaging to clarify the causes of irregular chip shape and its relationship with the tool-chip contact area. The technique includes extending the chip formation definition to include the torsional zone, analyzing irregular helical chips geometrically, and reconstructing the spatial posture of the chip. The study shows that chip form irregularities result from the clamping effect of the tool and workpiece on the free end of the chip, which changes the chip deformation in the torsional zone. No significant correlation is found between this irregularity and the tool-chip contact area. The angle between the tool-chip separation line and the chip flow velocity remains relatively stable. Microscopic morphological analysis reveals that the abrupt change of chip shape is caused by a sudden change in the chip-workpiece friction direction, which triggers plastic accumulation and significantly affects chip formation in the torsional zone, causing the chip to detach from the clamping effect and undergo severe deformation. The study concludes that the clamping effect plays a critical role in chip formation and provides an estimation of the geometric features of the tool-chip contact area, offering valuable data for dynamic cutting process modeling and process optimization.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"297 ","pages":"Article 110368"},"PeriodicalIF":7.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of electropolishing post-treatment on additively manufactured Ti6Al4V lattice structures

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-09 DOI: 10.1016/j.ijmecsci.2025.110370

Shivank Tyagi , M Manjaiah , Raj Das

{"title":"Effect of electropolishing post-treatment on additively manufactured Ti6Al4V lattice structures","authors":"Shivank Tyagi , M Manjaiah , Raj Das","doi":"10.1016/j.ijmecsci.2025.110370","DOIUrl":"10.1016/j.ijmecsci.2025.110370","url":null,"abstract":"<div><div>Additive manufacturing (AM), particularly laser powder bed fusion (L-PBF), has enabled the fabrication of titanium (Ti)-based lattice structures with triply periodic minimal surfaces (TPMS), offering great promise in hard tissue engineering. For successful implant integration, such structures must exhibit an elastic modulus within the physiological range of 1 to 30 GPa, while also requiring effective surface cleaning to eliminate residual unfused powder. However, most post-processing techniques fall short of accessing and treating complex internal geometry of these lattices. This study uniquely demonstrates the use of electropolishing as a scalable, geometry-conformal technique for simultaneously tuning surface quality and mechanical performance of AM TPMS lattices, a capability not previously reported for small unit cell (1.1 mm) Ti-6Al-4 V structures. This work establishes a direct link between electropolishing duration, unit-cell-level geometric changes, and their influence on bulk mechanical properties. Specimens with a 1.1 mm unit cell and 50% designed porosity were subjected to polishing, resulting in up to 40% reduction in elastic modulus, bringing values into the biologically desirable range. Detailed micro-CT reconstruction at the unit cell scale quantified changes in volume and surface area. High cycle fatigue (HCF) tests demonstrated a 22% improvement in fatigue life for electropolished specimens (2-minute duration), with the diamond lattice consistently outperforming the gyroid in mechanical response. This study comprehensively links electropolishing-induced surface modification with mechanical and fatigue behavior in AM Ti-6Al-4 V TPMS lattices, providing an effective pathway for tuning implant properties via targeted post-processing.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"297 ","pages":"Article 110370"},"PeriodicalIF":7.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lateral Casimir force of rotating nanoparticle near Bi2Se3 plate Bi2Se3板附近旋转纳米粒子的横向卡西米尔力

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-09 DOI: 10.1016/j.ijmecsci.2025.110319

Shuqi Liu , Hui Shen , Tongbiao Wang , Tianbao Yu , Qinghua Liao

{"title":"Lateral Casimir force of rotating nanoparticle near Bi2Se3 plate","authors":"Shuqi Liu , Hui Shen , Tongbiao Wang , Tianbao Yu , Qinghua Liao","doi":"10.1016/j.ijmecsci.2025.110319","DOIUrl":"10.1016/j.ijmecsci.2025.110319","url":null,"abstract":"<div><div>A lateral Casimir force will exert on the nanoparticle when it rotates near a dielectric surface because of the symmetry breaking caused by the particle rotation. We study the lateral Casimir force acting on an InSb nanoparticle rotating near a topological insulator Bi<sub>2</sub>Se<sub>3</sub> plate. It is found that the lateral Casimir force in such a frame can be enhanced evidently compared with that exerting on a SiC nanoparticle rotating near an isotropic material. This enhancement arises from the matching of resonance frequencies between the nanoparticle's localized surface plasmon polaritons (SPPs) and the hyperbolic phonon polaritons (HPhPs) supported by the topological insulator. Furthermore, the presence of surface electronic states enables the formation of both hybrid hyperbolic plasmon-phonon polaritons (HPPPs) within the hyperbolic band and surface plasmon-phonon polaritons (SPPPs) outside this band. The lateral Casimir force can be actively modulated by varying both the chemical potential and thickness of Bi<sub>2</sub>Se<sub>3</sub>. A maximum lateral Casimir force is achieved at an optimal chemical potential. Furthermore, for nanoparticles with smaller radii, the force also reaches its peak value when the Bi₂Se₃ plate assumes a specific thickness. These findings demonstrate an effective approach for controlling the lateral Casimir force and manipulating nanoparticle movement.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"297 ","pages":"Article 110319"},"PeriodicalIF":7.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of creep behaviors in three-dimensional porous sintered silver by FFT homogenization 三维多孔烧结银的FFT均匀化蠕变行为研究

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-08 DOI: 10.1016/j.ijmecsci.2025.110275

Shuaifeng Ma , Yanwei Dai , Yinghua Liu

{"title":"Investigation of creep behaviors in three-dimensional porous sintered silver by FFT homogenization","authors":"Shuaifeng Ma , Yanwei Dai , Yinghua Liu","doi":"10.1016/j.ijmecsci.2025.110275","DOIUrl":"10.1016/j.ijmecsci.2025.110275","url":null,"abstract":"<div><div>Porous sintered silver is increasingly recognized as a key interconnection material for future high-temperature power device packaging due to its excellent thermal performance and mechanical properties. However, accurately predicting the creep behavior of porous sintered silver remains challenging. To address this, an enhanced FFT-based homogenization method was implemented to efficiently analyze the creep behavior of porous structures, accommodating different discretization methods. This approach incorporates a Representative Volume Element (RVE) model with porous microstructures using Gaussian random fields. Using a double power law creep constitutive model, this study aims to analyze the macroscopic and microscopic mechanical responses of porous sintered silver under different temperatures, strain rates, and loading conditions including stresses triaxiality and creep loading. The research findings reveal that the predictions from the Ramakrishnan-Arunachalam creep model closely match the FFT-based results, but as porosity and stress increase, the difference increases. Additionally, the presence of pores weakens the tensile properties of sintered silver, and this effect is more significant under high stress triaxiality conditions. Furthermore, the influence of pores on creep properties increases rapidly with increased applied stress before stabilizing at higher stress levels. These research results could provide some valuable insights for further understanding and controlling the creep behavior of porous sintered silver, which is crucial for optimizing its application in power electronic packaging.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"297 ","pages":"Article 110275"},"PeriodicalIF":7.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fillet effects on stiffened shell buckling: Experiments & optimization 圆角对加筋壳屈曲的影响：实验与优化

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-08 DOI: 10.1016/j.ijmecsci.2025.110277

Fayao Wang, Xiangtao Ma, Bo Wang, Peng Hao

{"title":"Fillet effects on stiffened shell buckling: Experiments & optimization","authors":"Fayao Wang, Xiangtao Ma, Bo Wang, Peng Hao","doi":"10.1016/j.ijmecsci.2025.110277","DOIUrl":"10.1016/j.ijmecsci.2025.110277","url":null,"abstract":"<div><div>Stiffened cylindrical shells are widely used in aerospace engineering for their high specific stiffness and strength. However, fillets—inevitable in manufacturing—critically affect key structural properties such as stiffness, weight, and load-carrying capacity, especially in configurations with dense stiffeners. Despite their significant influence, these features have largely been omitted from optimization designs, leading to discrepancies between theoretical predictions and actual performance. In this study, we introduce a novel optimization framework that explicitly incorporates fillet characteristics into the design process. Utilizing a Representative Volume Element method, proposed approach maps fillet features to the design parameter space and quantifies their impact on stiffness. The framework was validated through high-precision buckling experiments and numerical optimization of hierarchical stiffened shells, achieving a load-carrying capacity prediction error of only 0.2 % and a 14 % enhancement in capacity. These results not only underscore the critical role of fillet features but also establish a new paradigm for integrating manufacturing influences into the optimization of thin-walled structures, thereby advancing lightweight aerospace design and manufacturing.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"297 ","pages":"Article 110277"},"PeriodicalIF":7.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Data-driven topology optimization design of phononic crystals for vibration control

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-08 DOI: 10.1016/j.ijmecsci.2025.110358

Chunfeng Zhao , Ao Huang , Fan Chu , Tian Zhang

{"title":"Data-driven topology optimization design of phononic crystals for vibration control","authors":"Chunfeng Zhao , Ao Huang , Fan Chu , Tian Zhang","doi":"10.1016/j.ijmecsci.2025.110358","DOIUrl":"10.1016/j.ijmecsci.2025.110358","url":null,"abstract":"<div><div>Phononic crystals, as artificial composite materials, exhibit bandgap characteristics that strongly depend on the geometry of the unit cell. This study proposes an innovative machine learning-driven framework for the inverse design of phononic crystals (PnCs). First, we developed a new hybrid framework that integrates variational autoencoders (VAE) with Light Gradient Boosting Machine (LightGBM), establishing a groundbreaking paradigm for bandgap prediction. Secondly, a genetic algorithm (GA) enhanced optimization strategy is proposed, combining machine learning (ML) prediction with multi-objective evolutionary search, enabling simultaneous optimization of filling rate minimization and precise low-frequency bandgap targets (50–70 Hz). Finally, the vibration isolation capability of the designed phononic crystal is verified by frequency domain analysis and time history analysis. In addition, the feasibility and reliability of the data-driven topology optimization design method are fully demonstrated. The results show that the LightGBM achieves fast and accurate bandgap boundary prediction with MSE as low as 0.015 after 100 iterations on the validation set and R² as high as 0.999 on the test set. Four groups of low filling rate (39.1 %) metamaterials are designed to mitigate the subway vibration through the proposed machine learning-driven framework. It is also indicated that the optimized metamaterial barriers significantly attenuated the vibration wave by 90 %. The proposed framework can provide a new possibility for the design of multi-resonator and multi-function PnCs.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"297 ","pages":"Article 110358"},"PeriodicalIF":7.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tensegrity-inspired sandwich metamaterial for reprogrammable stiffness and impact mitigation 受张拉整体启发的夹层超材料，用于可重新编程的刚度和冲击缓解

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-07 DOI: 10.1016/j.ijmecsci.2025.110344

Bowen Tan, Bushra Jawed, Ke Liu

{"title":"Tensegrity-inspired sandwich metamaterial for reprogrammable stiffness and impact mitigation","authors":"Bowen Tan, Bushra Jawed, Ke Liu","doi":"10.1016/j.ijmecsci.2025.110344","DOIUrl":"10.1016/j.ijmecsci.2025.110344","url":null,"abstract":"<div><div>Metamaterials are renowned for their unique properties, but most have fixed properties once fabricated. Tensegrity metamaterials offer tunable mechanical properties by adjusting prestress, making them excellent for load-bearing and energy absorption. However, tensegrity structures’ inherent self-equilibrium and stability demand complex geometries with irregular angles and pre-tensions, restricting convenient fabrication. To address those limitations, we propose a tensegrity-inspired sandwich metamaterial (TSM), which preserves the stress redistribution capability of standard tensegrity structures, yet can be easily fabricated. The design comprises an elastic membrane sandwiched by two spiked plates, with the membrane in tension and the spikes in compression. The TSM can be reprogrammed to achieve a wide range of static and dynamic responses by adjusting the preloading distance between the two plates. In particular, the TSM achieves a tuning of energy dissipation efficiency within the range of 20%-56% and the tuning of mitigation rate in the range of 0.136-0.204 by a single layer. This study provides a pathway for creating effective and reprogrammable energy-absorbing metamaterials for impact mitigation systems, allowing for active control of static and dynamic responses.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"296 ","pages":"Article 110344"},"PeriodicalIF":7.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143913247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A fast and high-precision embedded compensation system for multi-effector micro-manipulator 一种多效应器微机械臂快速高精度嵌入式补偿系统

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-07 DOI: 10.1016/j.ijmecsci.2025.110357

Fei Lu, Weishan Chen, Jie Deng, Shijing Zhang, Yingxiang Liu

{"title":"A fast and high-precision embedded compensation system for multi-effector micro-manipulator","authors":"Fei Lu, Weishan Chen, Jie Deng, Shijing Zhang, Yingxiang Liu","doi":"10.1016/j.ijmecsci.2025.110357","DOIUrl":"10.1016/j.ijmecsci.2025.110357","url":null,"abstract":"<div><div>Multi-effector micro-manipulator (MEMM) systems are favored for transporting and manipulating targets due to their multiple degrees of freedom (multi-DOF) operation capabilities. However, the complex structure adopted to achieve multi-DOF operation capabilities poses a great challenge to the improvement of the MEMM performance, especially the speed and precision. In this study, a multi-DOF piezo-array embedded four-effector manipulator is used to investigate the influence of multi-effector and the complex structure on the performance of the MEMM. A predictive digital model is introduced to analyze the output characteristics of the MEMM and evaluate the effects of different compensation methods. Both model predictions and experimental results show that the low-order modal coupling of the complex structure significantly affects the output characteristics of the MEMM and induces residual and coupled vibrations. The proposed embedded internal model compensation (EIMC) method, which utilizes the predictive capabilities of the digital model and the embedded computing capabilities of the embedded system, effectively reduces the residual and coupled vibrations of the MEMM (typical efficiency 74.4%∼85.8%), and ultimately achieves an average convergence time of 0.0005 s and a precision of ±0.06 μm. Compared with ramp compensation (RC) method and PID control, the EIMC method improves the speed performance of the MEMM by more than 70% and the precision performance by more than 50%. These findings are expected to mitigate vibration problems in rapid-positioning, potentially expanding MEMM applications in medical sample processing, optical focusing and image scanning.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"297 ","pages":"Article 110357"},"PeriodicalIF":7.1,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Indentation energy method for evaluating the effect of local PWHT on pressure vessels 评价局部PWHT对压力容器影响的压痕能量法

IF 7.1 1区工程技术

International Journal of Mechanical Sciences Pub Date : 2025-05-06 DOI: 10.1016/j.ijmecsci.2025.110356

Wei Peng , Wenchun Jiang , Wenbin Gu , Jun Li , Tong Xu , Guangfei Guo , Xiaonan Zhao , Xihai Hu

{"title":"Indentation energy method for evaluating the effect of local PWHT on pressure vessels","authors":"Wei Peng , Wenchun Jiang , Wenbin Gu , Jun Li , Tong Xu , Guangfei Guo , Xiaonan Zhao , Xihai Hu","doi":"10.1016/j.ijmecsci.2025.110356","DOIUrl":"10.1016/j.ijmecsci.2025.110356","url":null,"abstract":"<div><div>Post weld heat treatment (PWHT) is widely applied to improve the performance and eliminate residual stresses of the welded joint in the field of pressure vessels. However, a significant challenge arises in conducting in-situ evaluations of the local PWHT effectiveness during the manufacturing. The absence of reliable testing methods and instructive assessment cases make it difficult to carry out in engineering practice. In this work, two real-size 12Cr2Mo1V steel cylindrical shells were butt-welded together as an experimental product, which was then used for local PWHT and followed evaluation experiments. The Indentation Energy (IE) method was utilized to assess the residual stress and strength of the welded joint both before and after local PWHT. To verify its reliability, X-ray diffraction method, hole-drilling method and finite element analysis were also adopted. The results obtained from these methods show a great agreement. According to the test results, the residual stresses are redistributed after local PWHT, the peak stresses of the outer wall are reduced by about 70 % on average, and that of the inner wall are reduced by about 60 %. Particularly, there are still about 200 MPa axial tensile stresses on the inner surface due to the shrinkage deformation. After local PWHT, the tensile properties of the welded joint become uniform. The decrease in tensile properties of the weld metal is much greater than that of the base metal, but both within the standard range.</div></div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"297 ","pages":"Article 110356"},"PeriodicalIF":7.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0