Article
Engineering, Aerospace
Tianshuai Wang, Xiaofan He, Jinyu Wang, Yuhai Li
Summary: This paper proposes a novel Detail Fatigue Rating (DFR) method to evaluate the fatigue strength of AM materials based on their unique fatigue behaviors and fatigue life distributions. A bimodal Weibull distribution model is established for predicting fatigue life, and the effectiveness of the method is demonstrated through calculation results and S-N curve fitting analysis.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Engineering, Mechanical
Paolo Livieri
Summary: This paper presents a study on the fatigue behavior of hot riveted joints using experimental and numerical analysis. The experimental data showed discrepancies with the Eurocode standards. The numerical analysis revealed that friction force reduces the stress range and stress concentration on the rivets is crucial for the distribution of stress at the net section.
Article
Engineering, Mechanical
Yue Zhao, He Wang, Hechang Li, Jifan He, Yan Zhou, Jianhua Liu, Jinfang Peng, Minhao Zhu
Summary: Fatigue tests were conducted on Al alloy-CFRP single-shear lap riveted joints and adhesive-riveted hybrid joints to investigate their failure mechanisms under different loads. The study considers the effect of heat accumulation caused by interfacial friction on joint competitive failure. Results show that the Al-CFRP joint experiences competitive fretting fatigue, and the failure modes of heterogeneous joints are influenced by the sensitivity of mechanical properties to external environment changes. The presence of adhesive slows down interfacial wear, enhancing the joint's life by 500% under lower loads, but fails to prevent temperature rise and only improves life by 80% under higher loads.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Shi Wang, Jianfei Fan, Hechang Li, He Wang, Zhouyuan Lan, Jianhua Liu, Jinfang Peng, Minhao Zhu
Summary: This study investigates the damage evolution and failure of single-lap riveted joints and adhesive-riveted hybrid joints in carbon fiber-reinforced plastic (CFRP). The results show that a slight increase in load significantly decreases the service life due to the elevated temperature caused by load increment. Without adhesive bonding, the damage at the lap plate interface is similar under both types of loads, with worse damage observed on the hole wall compared to the contact interface. The addition of adhesive enhances the fatigue performance of CFRP riveted joints and reduces the sensitivity of the structure to external excitation loads.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
He Wang, Hechang Li, Yue Zhao, Xuetong Liu, Jinfang Peng, Liping He, Jianhua Liu, Minhao Zhu
Summary: The fatigue life, damage evolution process, and fatigue fracture behaviour of an aluminium alloy single shear lap joint riveted by a swage-locking pin were studied through a fatigue test. Various equipment, including optical microscope, scanning electron microscope, electron probe microanalyzer, and three-dimensional white light interferometry, were used to study the characteristics and area of debris at the interface of the lap-plate under different cycles. Two fatigue failure modes of the joint were observed under different fatigue loads. Micro-cracks were generated in the contact area under fretting wear, with the highest maximum principal stress at the crack source.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
He Wang, Hechang Li, Yue Zhao, Xuetong Liu, Jinfang Peng, Jianhua Liu, Minhao Zhu
Summary: This study quantitatively describes the fatigue failure process of aluminium alloy riveted single-shear lap joints by analyzing the dynamic response. Firstly, a numerical analysis method based on MATLAB is proposed to calculate the cyclic relative displacement amplitude, stiffness, and dissipated energy. Secondly, the service behavior corresponding to the evolution of relative displacement amplitude and dissipated energy is analyzed and verified through finite element simulation. Finally, the cycles corresponding to crack initiation, slow and rapid propagation are calculated and verified by observing crack growth propagation through interruption tests based on the evolution of cyclic compression stiffness.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Qingxiao Liang, Tianpeng Zhang, Chunrun Zhu, Yunbo Bi
Summary: This paper establishes a three-dimensional finite element model to simulate the effects of different riveting angles and directions on the connection quality and fatigue performance of single-rivet lap joints, and analyzes the key influencing factors on riveting quality.
Article
Chemistry, Physical
Jan Godzimirski, Marek Roskowicz, Michal Jasztal, Iga Barca
Summary: The purpose of this study was to analyze the impact of different mechanical fastener types on the static strength and failure mechanism of lap joints in composite elements, as well as the effect of supplementing these joints with adhesive joints under fatigue load. Computed tomography technology was used to observe damage in the composite joints. The study found that partial damage to the hybrid joint does not increase the load on the fasteners or impair the joint's fatigue life, and the two-stage destruction of the hybrid joint enhances the safety of aircraft structures.
Article
Engineering, Civil
Jun Xu, Zhile Zhang, Taotao Wu
Summary: This study investigated the fatigue process of riveted joints in steel truss bridges, including fatigue details, fatigue propagation stages, and crack propagation models. The results showed that the fatigue life corresponding to hole edge crack fatigue detail category is shorter than that to the plate surface crack, and crack propagation life decreases with increasing load and decreasing load ratio.
Article
Engineering, Mechanical
Reza Masoudi Nejad, Filippo Berto, Mohammadreza Tohidi
Summary: This paper aims to estimate the fatigue life of 2024 aluminum plates in riveted joints under cyclic loading, using the finite element method and experimental tests. The analytical results were validated through numerical modeling and compared with numerical methods, showing acceptable achievements.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Hanyu Zhang, Zhouzhou Song, Lei Zhang, Zhao Liu, Ping Zhu
Summary: This paper investigates the influence of hygrothermal environment on the fatigue fracture mechanism of Aluminum-CFRP hybrid joints through experimental and simulation researches, and reveals the multi-stage fatigue failure characteristics and competitive mechanism of the joints.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Changyi Lei, Qinggai Huang, Yunbo Bi
Summary: The study shows that an appropriate squeezing displacement combination can make the tensile load distribution of riveted lap joints more uniform and reduce structural deformation magnitude. In some cases, the maximum strain value can be reduced by about 53.22-79.76%.
Article
Engineering, Civil
Zhengwen Jiang, Shui Wan, Zhi Fang, Aiming Song
Summary: The static and fatigue behaviors of a bolted GFRP/steel double-lap joint with a clamping force of 10 Nm were investigated experimentally. The fatigue damage evolution and stiffness degradation law were obtained, along with the F-N curve and a non-linear stiffness degradation model. Comparative analysis between GFRP/steel DLJ and GFRP/GFRP DLJ indicated differences, such as longer fatigue life and smaller compressive stresses in the bolt-hole of the outer GFRP laminates in the former.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Peng Gao, Tianyu Du, Jianfu Zhang, Pingfa Feng, Dingwen Yu
Summary: The fatigue behavior of Q345B low alloy structural steel single-lap bolt-welded joint was studied compared to bolted and welded joints. Experimental results showed that the bolt-welded joint has higher fatigue strength, and the usage of welds and bolts can enhance fracture resistance and bearing capacity of the joint. The local strain energy density method provides a better estimation of fatigue life for bolt-welded joint.
Article
Chemistry, Physical
Jiamei Lai, Zhichao Huang, Nanlin Tang, Zhaoxiao Hu, Yuqiang Jiang
Summary: This study investigated the influence of salt spray corrosion on self-piercing riveted joints. The results showed that the static and fatigue strengths of the joints decrease with prolonged salt spray time, and the failure modes also change. The initiation and propagation of fatigue cracks are promoted by salt spray corrosion.
Article
Engineering, Marine
M. Bernardino, M. Goncalves, R. M. Campos, C. Guedes Soares
Summary: Using the WAVEWATCHIII wave model, wave information for all ocean areas until the end of the 21st century is predicted, based on 120 years of global wind and ice-cover climate data. The results show an increase in mean significant wave height, wave energy and cumulative wave energy in the South Atlantic, and an increase in variability and a decrease in mean significant wave height in the North Atlantic. Other regions also exhibit changes, but to a lesser extent.
Article
Engineering, Marine
A. M. P. Santos, K. Fagerholt, C. Guedes Soares
Summary: The paper proposes a two-stage stochastic programming algorithm to address the Supply Vessel Planning Problem (SVPP) with stochastic demands and uncertain weather conditions in offshore oil and gas logistics. The algorithm incorporates the cost of recourse actions in the objective function and uses a genetic algorithm with discrete event simulation to approximate the cost of each solution. The study shows that solving the stochastic program leads to average annual cost savings of approximately 12% compared to solving the deterministic version.
Article
Engineering, Industrial
L. M. R. Silva, C. Guedes Soares
Summary: A robust optimization model is proposed to identify the most feasible production system that considers technical-economic and safety analysis. The model aims to minimize investment costs and pipeline risks, and it verifies the optimal solution through constraint and assumption testing. A case study demonstrates the practical performance of the methodology, highlighting the importance of direct flow paths, risk reduction, and cost reduction. The model suggests the use of a clustered satellite wells system and emphasizes the significance of reducing manifold size to decrease joint production.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Engineering, Industrial
P. Antao, S. Sun, A. P. Teixeira, C. Guedes Soares
Summary: The paper evaluates the contribution of specific Risk Influencing Factors to ship collision accidents using a combination of Cox proportional hazard regression model, Bayesian rule, and least-squares method. Historical data of collision accidents worldwide and information of the world's merchant fleet are used for the assessment. Based on a global sample of 936 collision events from 2005 to 2017, six Risk Influencing Factors are assessed, including Ship length, Ship type, age of the ship, Classification Society, flag, and geographical area. The results indicate that ship type and geographical area have the greatest impact on ship collisions.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Engineering, Marine
P. Pires da Silva, Serge Sutulo, C. Guedes Soares
Summary: Sensitivity analysis is applied to ship manoeuvring mathematical models to deal with uncertainties and simplify the models. The study conducted perturbed simulations of various manoeuvres and found that the model was most sensitive to linear and some nonlinear multivariable parameters. The use of Euclidean metric allowed for a more detailed analysis.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Marine
Ruoxuan Li, Bai-Qiao Chen, C. Guedes Soares
Summary: This paper validates a finite element model to study the buckle propagation pressure of a pipe-in-pipe system under uniform external pressure. The effects of initial imperfection, pipe scantling, and diameter ratio on the buckle propagation mode are investigated. An empirical formula is proposed to estimate the buckle propagation pressure accurately and rapidly.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Marine
Esmaeil Zavvar, Hossam S. Abdelwahab, Emre Uzunoglu, Bai-Qiao Chen, C. Guedes Soares
Summary: This study assesses the stress distribution and hydrodynamic response of the preliminary structural design of a tension leg platform for a 10 MW wind turbine. The platform is modelled and analyzed using the finite element method. Stress distribution is determined in still water conditions with the turbine operating at above-rated conditions, and the response of the tension leg platform is estimated in the time domain. The results show reasonable agreement with available data, and classification societies' recommendations are used to check the design against stress distribution.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Editorial Material
Engineering, Marine
Bai-Qiao Chen, C. Guedes Soares
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Mechanical
Ying Tang, Shi-Li Sun, Arash Abbasnia, C. Guedes Soares, Hui-Long Ren
Summary: A fully nonlinear hydroelastic numerical method is proposed for fluid-structure interactions of elastic ships. The method solves the boundary value problem using a three-dimensional boundary element method. An effective mesh optimization solution is developed to simulate the instantaneous evolution on the free surface. The results are compared with experimental data and show satisfactory agreement.
JOURNAL OF FLUIDS AND STRUCTURES
(2023)
Article
Engineering, Marine
U. Bhardwaj, A. P. Teixeira, C. Guedes Soares
Summary: This paper presents an integrated framework for the reliability-based design of deep-water vertical subsea separators using a novel collapse strength model. The proposed strength model is verified against experimental collapse pressure and other analytical models. The application of the presented methodology is demonstrated in a case study where uncertainties are systematically considered and the target reliability is used as a single design constraint.
Article
Engineering, Marine
Joao P. S. Lima, F. Evangelista, C. Guedes Soares
Summary: A method based on a Bi-fidelity Kriging model is proposed for structural reliability analysis, which saves computational effort by adding low-fidelity data samples to predict high-fidelity values.
Article
Engineering, Marine
Zhongchi Liu, C. Guedes Soares
Summary: A numerical model is developed to calculate the mooring forces and cage volumes for a gravity cage system. The effect of structural parameters on the cage capacity and mooring forces is evaluated, and linear wave theory is applied to analyze the influence of waves on the mooring forces.
Article
Mechanics
Huidong Zhang, Tong Wang, Cong Xu, Hongda Shi, Carlos Guedes Soares
Summary: A new wave energy converter is proposed, consisting of three split heave point absorbers and a taut-moored floating turbine, which is suitable for waves in the China Sea with short periods and small amplitudes. Physical model tests reveal that the new device significantly improves wave energy capture efficiency for short-period waves in low sea states. The submerged platform contributes to this improvement through out-of-phase heave motion and the induced shallow water effect, particularly with a high damping force in the power takeoff system. However, the high-frequency oscillation caused by the coincident wave direction and mooring lines needs further optimization of the taut mooring system.
Article
Engineering, Industrial
Dawei Gao, Kai Huang, Yongsheng Zhu, Linbo Zhu, Ke Yan, Zhijun Ren, C. Guedes Soares
Summary: This paper proposes a semi-supervised fault diagnosis method through feature perturbation and decision fusion. To improve the generalization capability of the model, a dual correlation model is constructed, and the structural parameters are adjusted. The final fusion diagnosis is achieved by analyzing high-confidence samples.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2024)
Article
Engineering, Industrial
Dawei Gao, Yongsheng Zhu, Ke Yan, C. Guedes Soares
Summary: This paper introduces a risk assessment framework based on the predictable Transformer network and clustering method, which addresses the issues of inaccurate indicator calculation and difficulty in training deep learning algorithms in traditional methods. The potential collision risk ships are first clustered using a clustering algorithm, and then the Transformer network is used to predict the possible future positions of ships. Finally, the collision risk for ship pairs and the regional collision risk are evaluated based on the predicted results.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2024)
Article
Engineering, Mechanical
Miloslav Kepka, Miloslav Kepka Jr, Radovan Minich
Summary: This paper focuses on the fatigue life evaluation of the bodywork of a new articulated electric (battery) bus. The findings resulted in recommendations to improve the operational reliability of a particular vehicle and provided challenges for future research.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
T. Dusautoir, B. Berthel, S. Fouvry, P. Matzen, K-D. Meck
Summary: This study investigates the impact of post-processing treatments on the fatigue limit of additive manufactured Ti-6Al-4V under stress gradients, with a focus on surface integrity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhuofan Xia, Di Wu, Xiaochen Zhang, Jianqiu Wang, En -Hou Han
Summary: The study reveals the surface-initiated rolling contact fatigue (RCF) failure mechanism under heavy load and initial high roughness surface. The results indicate that precursor of collapsed morphology and nanocrystalline layer are the main factors causing lower RCF life with high roughness compared to low roughness surfaces. The spalling failure initiating from low roughness surface under heavy load is strongly dependent on surface plastic deformation.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Daniel Gren, Knut Andreas Meyer
Summary: Rolling contact loading can cause plastic deformation and fatigue cracks. Current rail standards do not consider the effect of plasticity on mechanical behavior. This study proposes a new method for evaluating the fatigue life of deformed material and finds that superimposed compressive axial loads can increase fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
R. Kumar, S. Sanyal, J. Bhagyaraj, E. Hari Krishna, S. Mukherjee, K. Prasad, S. Mandal
Summary: This study investigates the thermomechanical fatigue (TMF) behavior of Timetal 834 alloy under different loading conditions. The results show that the alloy exhibits different cyclic hardening and softening responses at different strain amplitudes. The strain amplitude and phase angle have significant effects on the TMF life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kai Donnerbauer, Tobias Bill, Peter Starke, Ruth Acosta, Bharath Yerrapa, Christian Boller, Klaus Heckmann, Frank Walther
Summary: Given the aging of nuclear power plants, it is important to develop methods for evaluating the integrity of components and structures in nuclear engineering. Suitable nondestructive testing methods can detect material degradation and determine its fatigue life. This study utilized various NDT parameters and scanning electron microscopic methods to explore the relationship between microstructure evolution and NDT data.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Liuyong He, Jiang Zheng, Tianjiao Li, Houkun Zhou, Lihong Xia, Bin Jiang
Summary: This study quantitatively analyzed the effects of precipitates on the deformation mode, cracking mode, and mechanical behavior of WE54 magnesium alloy during low-cycle fatigue. It was found that precipitates promoted the activation of dislocation slip and suppressed the activation of twinning, affecting the cracking mode and mechanical behavior.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Xiangkang Zeng, Conghui Zhang, Wenguang Zhu, Mingliang Zhu, Tongguang Zhai, Xiaomei He, Kangkai Song, Zhuohang Xie
Summary: The cyclic deformation behaviors and damage mechanisms of pure Zr were investigated. The cyclic stress response was mainly influenced by substructure evolutions. Prismatic < a > dislocation slip was identified as the dominant deformation mechanism. Fatigue damage was not only influenced by the initial texture, but also other factors.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Jingyu Yang, Bingbing Li, Yiming Zheng, Gang Chen, Xu Chen
Summary: Heat treatment is used to improve the low-cycle fatigue performance of additive manufactured 316LN stainless steel. The heat-treated material demonstrates initially cyclic hardening followed by softening behavior, and shows a stronger resistance to crack propagation compared to the as-built material, resulting in a longer fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Lang Zou, Dongfang Zeng, Xiong Chen, Jun Li, Hai Zhao, Liantao Lu
Summary: This study investigates the competitive relationship between fretting fatigue and plain fatigue in press-fitted railway axles. By changing the depth of the stress relief groove, the plain fatigue limit and fretting fatigue strength were tested. Detailed information was gathered, and an evaluation methodology integrating finite element simulation and the Modified Wohler Curve Method was established. The study concludes that the optimal groove depth, which balances the anti-fatigue capabilities, depends on the number of test cycles.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Davide Leonetti, Koji Kinoshita, Yukina Takai, Alain Nussbaumer
Summary: This paper investigates the fatigue behavior of non-load-carrying transverse welded steel attachments, including fatigue crack monitoring and fracture surface analysis under constant and variable amplitude loading. A procedure is proposed to obtain a Markov transition matrix based on the measured strain signal and to randomly resample the stress history for variable amplitude fatigue tests.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhe Zhang, Bing Yang, Yuedong Wang, Shoune Xiao
Summary: This paper presents a method for designing fatigue life prediction models with small sample sizes by handling limited sample data. The method integrates the equivalent structural stress method with the maximum likelihood estimation method and adds reliability verification, resulting in enhanced goodness of fit, stability, and optimized sample quantity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Cooper K. Hansen, Gary F. Whelan, Jacob D. Hochhalter
Summary: This paper presents a method to address the computational demand issue of computing FIPs using CPFEM by developing an interpretable machine learning model. Genetic programming is used to evolve interpretable expressions of FIPs from microstructure features, and these models can serve as efficient substitutes for CPFEM and be easily integrated into engineering workflows.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Luca Susmel
Summary: This paper discusses the problem of estimating notch fatigue limits using machine learning. The results show that machine learning is a promising approach for designing notched components against fatigue. The accuracy in estimating the fatigue limit can be increased by increasing the size and quality of the calibration dataset, as well as including additional input features.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kefeng Gao, Guoqi Tan, Yanyan Liu, Qiang Wang, Qian Tang, Xuegang Wang, Qiqiang Duan, Zengqian Liu, Zhe Yi, Zhefeng Zhang
Summary: Bioinspired architectures have significant effects on material enhancement. This study investigates the fatigue properties of bioinspired ceramic-polymer composites and natural nacre, revealing the close relationship between architectural types, orientations, fatigue performance, and damage mechanisms.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
