Article
Chemistry, Physical
Wojciech Macek, Ricardo Branco, Jose Domingos Costa, Jaroslaw Trembacz
Summary: The present study evaluates the fracture surface response of fatigued 34CrNiMo6 steel bars with transverse blind holes subjected to bending with torsion loading. The analysis of the geometric product specification and surface topography measurements show that increasing the bending to torsion moment ratio can reduce the parameters of the fractured surface while increasing the number of cycles to fatigue crack initiation.
Article
Engineering, Mechanical
R. Branco, P. Prates, J. D. Costa, A. Cruces, P. Lopez-Crespo, F. Berto
Summary: This paper uses the cumulative strain energy density to predict the fatigue life of notched members under multiaxial loading. The relationship between energy absorbed and cycles to failure is established, and the proposed model is compared to other stress-based and energy-based models. The results show that the proposed model has good predictive capabilities and outperforms the other tested models.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Wojciech Macek, Lukasz Pejkowski, Ricardo Branco, Reza Masoudi Nejad, Krzysztof Zak
Summary: This paper studies the effect of asynchronous axial-torsional strain-controlled loading histories on the fracture surface behavior of thin-walled tubular austenitic steel specimens. The results show that the multiaxial loading path significantly affects the surface topography and a fatigue damage model has been developed to estimate the fatigue lifetime.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Wojciech Macek, Ricardo Branco, Jose Domingos Costa, Candida Pereira
Summary: The study demonstrates a linear dependency of the fracture surface parameter core height Sk on the equivalent strain, and a logarithmic dependency on the fatigue life in the two-step loading program.
MECHANICS OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Wojciech Macek
Summary: This study aimed to investigate the distribution of fracture surface roughness of notched 2017A-T4 aluminum alloy after bending fatigue using an optical focus-variation surface measurement technique, revealing significant differences in roughness at different stages of fatigue fracture surfaces due to various loading scenarios.
INTERNATIONAL JOURNAL OF FRACTURE
(2022)
Article
Materials Science, Multidisciplinary
Wojciech Macek, Reza Masoudi Nejad, Shun-Peng Zhu, Jaroslaw Trembacz, Ricardo Branco, Jose D. M. Costa, Jose A. M. Fereira, Carlos Capela
Summary: In this study, different fracture surfaces from fatigue failure of 18Ni300 steel produced by selective laser melting (SLM) were generated. Hollow round bars with a transverse hole were tested under bending-torsion to investigate crack initiation mechanisms and fatigue life. Fracture surfaces were examined by optical profilometer and scanning electron microscope, focusing on the relationship between fatigue features and fracture surface topography parameters. A fatigue life prediction model based on both surface topography values and applied load was proposed, which showed good agreement with experimental results.
MECHANICS OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sheji Luo, Ming Liu, Lihong Han, Yuna Xue
Summary: This paper investigates the fatigue behavior of S135 high-strength drill pipe steel under tension-torsion multiaxial loading. The proposed fatigue model is validated and shows good agreement with experimental testing. The failure mechanism is discussed through fracture analysis.
Article
Engineering, Mechanical
Pedro R. da Costa, Luis Reis, Manuel Freitas
Summary: Ultrasonic fatigue testing is a method that uses resonance to achieve very high cyclic load frequencies for studying high cycle fatigue. This study modified the geometry of the specimen and conducted numerical and experimental modal behavior analysis to achieve reliable multiaxial fatigue testing. The results prove a clear trend in crack propagation details with the increase of the induced stress ratio.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Engineering, Mechanical
Masao Sakane, Nobuhiro Isobe
Summary: This paper discusses suitable strain and stress low-cycle fatigue (LCF) parameters for Alloy 738LC, a Ni-based superalloy, under tension-torsion loading at 1173 K. The linear damage rule based on von Mises equivalent strain and stress is used to estimate the creep-fatigue lives of the alloy with reasonable accuracy. Suitable strain parameters for multiaxial LCF life correlation are discussed in relation with the stress response.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Materials Science, Multidisciplinary
Wojciech Macek
Summary: The study analyzed the impact of pseudo-random non-proportional bending-torsion fatigue loadings on fatigue life and fracture surface topography. It was found that the ratio of maximum stresses has the most influence on the void volume parameter in the rupture area. A new fatigue loading parameter was introduced, showing a strong correlation with the void volume parameter for the rupture area.
Article
Mechanics
Natalia Ribeiro Marinho, Mariano Andres Arbelo, Geraldo Mauricio Candido, Rita de Cassia Mendonca Sales, Mauricio Vicente Donadon
Summary: This study investigated the Mode I delamination fatigue crack growth behavior in a carbon-epoxy prepreg fabric laminate by evaluating the mean load effects. Results showed that the fatigue crack growth rate was determined as a function of the maximum Mode I strain energy release rate, while the delamination growth rate curve was strongly affected by the applied mean load.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Douglas E. Nicholson, Santo A. Padula, Othmane Benafan, Jeffrey R. Bunn, E. Andrew Payzant, Ke An, Dayakar Penumadu, Raj Vaidyanathan
Summary: Thermoelastic deformation mechanisms in polycrystalline biomedical-grade superelastic NiTi are studied using in situ neutron diffraction during multiaxial loading and heating. The reversible R-phase variant microstructure is able to accommodate stress and strain mismatch in different loading conditions.
ADVANCED MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Wojciech Macek, Ricardo Branco, Mateusz Korpys, Tadeusz Lagoda
Summary: The study compared fracture surfaces of different metallic materials after fatigue tests and established a direct correlation between fractal dimension and fatigue loading through fractal dimension analysis and optical measurement. This is important for obtaining fatigue loading information from the surfaces of failed materials and structures and contributes to a better understanding of fatigue failure processes.
Article
Engineering, Mechanical
Luiz Carneiro, Qin Yu, Yanyao Jiang
Summary: The mechanical behavior and microstructure of a rolled AZ31B magnesium alloy under different ratios of axial and shear stress were experimentally investigated. The stress state significantly influenced the stress-strain responses and strain hardening rate. Different loading conditions resulted in variations in strength and ductility. Detailed twinning structures provided insights into the post-fracture texture and the mechanism behind the stress state effect.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
R. Branco, J. D. Costa, J. A. Martins Ferreira, C. Capela, F. Antunes, W. Macek
Summary: This study investigates the multiaxial fatigue behavior of maraging steel samples produced by selective laser melting, predicting fatigue crack initiation sites and angles while computing fatigue lifetime using a one-parameter damage law. By incorporating cyclic plasticity at the notch-controlled process zone, the study shows a strong correlation between experimental observations and predicted lives under various multiaxial loading scenarios.
MATERIALS & DESIGN
(2021)
Article
Engineering, Mechanical
Zbigniew Marciniak, Ricardo Branco, Rui F. Martins, Wojciech Macek, Dariusz Rozumek
Summary: The influence of defect features on fatigue behavior is complex and not well understood. This study investigates the influence of the orientation of elliptical defects on the durability of C45 steel samples. The results show that the defect orientation has a greater effect under bending loading and the defects oriented perpendicularly to the longitudinal axis of the specimen are more detrimental.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Weishan Long, Zhixiong Chen, Zhixiong Li, Grzegorz Krolczyk, Yijun Shi
Summary: This paper experimentally studied the tribological properties of hybrid bearings under oil lubrication and analyzed the microscopic morphology using an optical three-dimensional reconstruction method. The results showed that hybrid bearings have better friction performance compared to ordinary bearings, and a wear failure evaluation model was established.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2023)
Article
Engineering, Multidisciplinary
Hebin Liao, Tianqin Lin, Paolo Gardoni, Wei Zhang, Xiaogang Li, Grzegorz Krolczyk, Lei Deng, Z. X. Li
Summary: The tobacco flavoring process is crucial in the production stage, and the drum's internal structure plays a significant role in the flavoring effect. This paper used molecular dynamics analysis to study the particle behavior of cut tobacco in the drum and explore the optimal structure parameters. The results showed that the flavoring effect was significantly improved through structural modification.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Engineering, Electrical & Electronic
Xiaoqiang Guo, Xinhua Liu, Xu Zhang, Grzegorz M. Krolczyk, Paolo Gardoni, Zhixiong Li
Summary: The powerful belt conveyor is crucial for coal mining transportation, and its stable operation is essential for efficiency. Machine vision-based damage detection systems are widely studied and deployed, but capturing high-quality images in the harsh underground coal seam environment is difficult. To solve this issue, an image denoising and enhancement approach based on invertible neural network (INN) is proposed. The proposed model, called denoising INN (DeINN), demonstrates excellent image denoising ability and outperforms existing methods.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Mechanical
Qing-Yun Deng, Shun-Peng Zhu, Xiaopeng Niu, Grzegorz Lesiuk, Wojciech Macek, Qingyuan Wang
Summary: This study defines a simple and applicable method to quantify the effect of non-proportional loading on fatigue life and proposes a new fatigue damage parameter. Experimental data validation shows that this method effectively evaluates the multiaxial fatigue life of materials under non-proportional loadings.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
S. Wojciechowski, J. Krajewska-Spiewak, R. W. Maruda, G. M. Krolczyk, P. Nieslony, M. Wieczorowski, J. Gawlik
Summary: This study evaluates the ploughing phenomenon in precise ball-end milling of AISI L6 alloy steel by studying the ploughing forces in tool flank face - workpiece interface. The developed ploughing force model considers the effect of minimum uncut chip thickness h(min) and ploughing volume during ball-end milling. The estimated ploughing forces are sensitive to variations of surface inclinations and progressing tool wear. Moreover, the intense growth of ploughing force during milling with a worn tool is affected by irregular and non-circular profile of worn cutting edge below the stagnant point, and by the appearance of attrition and micro-grooves on the tool flank face.
TRIBOLOGY INTERNATIONAL
(2023)
Correction
Engineering, Mechanical
Kamil Leksycki, Eugene Feldshtein, Radoslaw W. Maruda, Navneet Khanna, Grzegorz M. Krolczyk, Catalin I. Pruncu
TRIBOLOGY INTERNATIONAL
(2023)
Article
Thermodynamics
Zhibo Xu, Yu Bie, Fei Chen, Grzegorz Krolczykg, Jielei Tu, Zhixiong Li
Summary: The conventional evacuated tube solar air collector is limited by poor heat transfer and can't reach high temperatures, but the proposed novel collector combined with a compound parabolic concentrator improves heat transfer and has advantages in temperature output, thermal efficiency, flow rate adaptability, and potential temperature rise. The optical performance of the concentrator is obtained through non-imaging optics and ray tracing. Numerical simulation and analysis show that air flow rate, inlet temperature, and heat source energy density mainly affect the thermal performance. Evaluating under different conditions, the new collector achieves a maximum outlet temperature of 181.17 degrees C, a maximum thermal efficiency of 59.21%, and demonstrates better thermal insulation performance compared to a traditional collector with a maximum outlet temperature of 153.25 degrees C under a normal inlet temperature of 25 degrees C and a flow rate range of 1.02-3.58 m3/h.
APPLIED THERMAL ENGINEERING
(2023)
Review
Engineering, Multidisciplinary
Mengmeng Wang, Atilla Incecik, Chunsheng Yang, Munish Kumar Gupta, Grzegorz Krolczyk, Darius Andriukaitis, Z. Li
Summary: Due to the continuous exploration of ocean resources, the safety and reliability of marine structures are becoming increasingly important. This review summarizes the numerical methods for structural failure analysis at macroscopic, mesoscopic, and microscopic scales, including macroscopic continuum, lattice Boltzmann, and molecular dynamics methods. The fundamental theories and recent progressions in each scale are summarized to provide suggestions for future development. The discussions of the latest achievements in structural failure analysis deepen our understanding of failure mechanisms in a marine environment and guide engineers and researchers in this field.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Materials Science, Multidisciplinary
Wojciech Macek, Reza Masoudi Nejad, Shun-Peng Zhu, Jaroslaw Trembacz, Ricardo Branco, Jose D. M. Costa, Jose A. M. Fereira, Carlos Capela
Summary: In this study, different fracture surfaces from fatigue failure of 18Ni300 steel produced by selective laser melting (SLM) were generated. Hollow round bars with a transverse hole were tested under bending-torsion to investigate crack initiation mechanisms and fatigue life. Fracture surfaces were examined by optical profilometer and scanning electron microscope, focusing on the relationship between fatigue features and fracture surface topography parameters. A fatigue life prediction model based on both surface topography values and applied load was proposed, which showed good agreement with experimental results.
MECHANICS OF MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Xiaoqiang Guo, Xinhua Liu, Paolo Gardoni, Adam Glowacz, Grzegorz Krolczyk, Atilla Incecik, Zhixiong Li
Summary: A novel conveyor belt damage detection method based on CenterNet is proposed in this paper, which utilizes a fusion of feature-wise and response-wise knowledge distillation to balance performance and network size. The Fused Channel-Spatial Attention is introduced to compress the latent feature maps efficiently, and Kullback-Leibler divergence is used to minimize the distribution distance between student and teacher networks. Experimental results show that the proposed lightweight object detection model achieves 92.53% mAP and 65.8 FPS. The proposed belt damage detection system demonstrates efficient and accurate detection of conveyor belt damages, indicating its high potential for deployment on end devices.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Multidisciplinary
Przemyslaw Podulka, Wojciech Macek, Beata Zima, Grzegorz Lesiuk, Ricardo Branco, Grzegorz Krolczyk
Summary: This paper validates the application of the Autocorrelation Function in characterising surface topography and proposes evaluation procedures based on the Autocorrelation Function. The properties of the Autocorrelation Function were measured using optical methods, and the suitability of various surface analysis methods was studied. The results show that the Autocorrelation Function supports commonly used techniques and analysis methods.
Article
Engineering, Marine
Mateusz Kowalski, Michal Bohm, Dariusz Rozumek, Amadeusz Kurek, Jose Correia
Summary: The paper presents the tension-compression fatigue test results of a new steel-aluminum welding transition joint with a titanium Grade 1 interlayer. It discusses the advantages of using these connectors in ships and emphasizes the eco-friendly effect due to reduced weight. However, the welding technology of the transition joint needs to be improved based on the fatigue results.
Article
Engineering, Industrial
Mengmeng Wang, Atilla Incecik, Shizhe Feng, M. K. Gupta, Grzegorz Krolczyk, Z. Li
Summary: A new digital twin (DT) framework with optimal sensor placement (OSP) is proposed, which accurately calculates the modal responses and identifies the damage ratios of offshore jacket platforms. The framework consists of an OSP model and a damage identification model. The OSP model optimizes the sensor number/location using the multi-objective Lichtenberg algorithm (MOLA) to balance the sensor cost and modal calculation accuracy. The damage identification model uses the Markov Chain Monte Carlo (MCMC)-Bayesian method to calculate the structural damage ratios based on modal information obtained from sensory measurements, considering the uncertainties of structural parameters. The method is validated using an offshore jacket platform, demonstrating efficient identification of structural damage location and severity.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Computer Science, Artificial Intelligence
Baiyi Wang, Zipeng Zhang, Patrick Siarry, Xinhua Liu, Grzegorz Krolczyk, Dezheng Hua, Frantisek Brumercik, Z. Li
Summary: The African vultures optimization algorithm (AVOA) has some shortcomings in solving complex problems. To address these issues, a nonlinear African vulture optimization algorithm (HWEAVOA) is proposed, which outperforms other algorithms in terms of convergence speed, optimization ability, and solution stability, according to experimental results.
EXPERT SYSTEMS WITH APPLICATIONS
(2024)
Article
Engineering, Multidisciplinary
Sicheng Jiao, Shixiang Wang, Minge Gao, Min Xu
Summary: This paper presents a non-contact method of thickness measurement for thin-walled rotary shell parts based on a chromatic confocal sensor. The method involves using a flip method to obtain surface profiles from both sides of the workpiece, measuring the decentration and tilt errors of the workpiece using a centering system, establishing a unified reference coordinate system, reconstructing the external and internal surface profiles, and calculating the thickness. Experimental results show that the method can accurately measure the thickness of a sapphire spherical shell workpiece and is consistent with measurements of other materials.
Article
Engineering, Multidisciplinary
Rajeev Kumar, Sajal Agarwal, Sarika Pal, Alka Verma, Yogendra Kumar Prajapati
Summary: This study evaluated the performance of a CaF2-Ag-MXene-based surface plasmon resonance (SPR) sensor at different wavelengths. The results showed that the sensor achieved the maximum sensitivity at a wavelength of 532 nm, and higher sensitivities were obtained at shorter wavelengths at the expense of detection accuracy.
Article
Engineering, Multidisciplinary
Attilio Di Nisio, Gregorio Andria, Francesco Adamo, Daniel Lotano, Filippo Attivissimo
Summary: Capacitive sensing is a widely used technique for a variety of applications, including avionics. However, current industry standard Capacitive Level Sensors (CLSs) used in helicopters perform poorly in terms of sensitivity and dynamic characteristics. In this study, novel geometries were explored and three prototypes were built and tested. Experimental validation showed that the new design featuring a helicoidal slit along the external electrode of the cylindrical probe improved sensitivity, response time, and linearity.
Article
Engineering, Multidisciplinary
Kai Yang, Huiqin Wang, Ke Wang, Fengchen Chen
Summary: This paper proposes an effective measurement method for dynamic compaction construction based on time series model, which enables real-time monitoring and measurement of anomalies and important construction parameters through simulating motion state transformation and running time estimation.
Article
Engineering, Multidisciplinary
Hui Fu, Qinghua Song, Jixiang Gong, Liping Jiang, Zhanqiang Liu, Qiang Luan, Hongsheng Wang
Summary: An automatic detection and pixel-level quantification model based on joint Mask R-CNN and TransUNet is developed to accurately evaluate microcrack damage on the grinding surfaces of engineering ceramics. The model is effectively trained on actual micrograph image dataset using a joint training strategy. The proposed model achieves reliable automatic detection and fine segmentation of microcracks, and a skeleton-based quantification model is also proposed to provide comprehensive and precise measurements of microcrack size.
Review
Engineering, Multidisciplinary
Sang Yeob Kim, Da Yun Kwon, Arum Jang, Young K. Ju, Jong-Sub Lee, Seungkwan Hong
Summary: This paper reviews the categorization and applications of UAV sensors in forensic engineering, with a focus on geotechnical, structural, and water infrastructure fields. It discusses the advantages and disadvantages of sensors with different wavelengths and addresses the challenges of current UAV technology and recommendations for further research in forensic engineering.
Article
Engineering, Multidisciplinary
Anton Nunez-Seoane, Joaquin Martinez-Sanchez, Erik Rua, Pedro Arias
Summary: This article compares the use of Mobile Laser Scanners (MLS) and Aerial Laser Scanners (ALS) for digitizing the road environment and detecting road slopes. The study found that ALS data and its corresponding algorithm achieved better detection and delimitation results compared to MLS. Measuring the road from a terrestrial perspective negatively impacted the detection process, while an aerial perspective allowed for scanning of the entire slope structure.
Article
Engineering, Multidisciplinary
Nur Luqman Saleh, Aduwati Sali, Raja Syamsul Azmir Raja Abdullah, Sharifah M. Syed Ahmad, Jiun Terng Liew, Fazirulhisyam Hashim, Fairuz Abdullah, Nur Emileen Abdul Rashid
Summary: This study introduces an enhanced signal processing scheme for detecting mouth-click signals used by blind individuals. By utilizing additional band-pass filtering and other steps, the detection accuracy is improved. Experimental results using artificial signal data showed a 100% success rate in detecting obstacles. The emerging concepts in this research are expected to benefit radar and sonar system applications.
Article
Engineering, Multidisciplinary
Jiqiang Tang, Shengjie Qiu, Lu Zhang, Jinji Sun, Xinxiu Zhou
Summary: This paper studies the magnetic noise level of a compact high-performance magnetically shielded room (MSR) under different operational conditions and establishes a quantitative model for magnetic noise calculation. Verification experiments show the effectiveness of the proposed method.
Review
Engineering, Multidisciplinary
Krzysztof Bartnik, Marcin Koba, Mateusz Smietana
Summary: The demand for miniaturized sensors in the biomedical industry is increasing, and optical fiber sensors (OFSs) are gaining popularity due to their small size, flexibility, and biocompatibility. This study reviews various OFS designs tested in vivo and identifies future perspectives and challenges for OFS technology development from a user perspective.
Article
Engineering, Multidisciplinary
Yue Wang, Lei Zhou, Zihao Li, Jun Wang, Xuangou Wu, Xiangjun Wang, Lei Hu
Summary: This paper presents a 3-D reconstruction method for dynamic stereo vision of metal surface based on line structured light, overcoming the limitation of the measurement range of static stereo vision. The proposed method uses joint calibration and global optimization to accurately reconstruct the 3-D coordinates of the line structured light fringe, improving the reconstruction accuracy.
Article
Engineering, Multidisciplinary
Jaafar Alsalaet
Summary: Order tracking analysis is an effective tool for machinery fault diagnosis and operational modal analysis. This study presents a new formulation for the data equation of the second-generation Vold-Kalman filter, using separated cosine and sine kernels to minimize error and provide smoother envelopes. The proposed method achieves high accuracy even with small weighting factors.
Article
Engineering, Multidisciplinary
Tonglei Cao, Kechen Song, Likun Xu, Hu Feng, Yunhui Yan, Jingbo Guo
Summary: This study constructs a high-resolution dataset for surface defects in ceramic tiles and addresses the scale and quantity differences in defect distribution. An improved approach is proposed by introducing a content-aware feature recombination method and a dynamic attention mechanism. Experimental results demonstrate the superior accuracy and efficiency of the proposed method.
Article
Engineering, Multidisciplinary
Qinghong Fu, Yunxi Lou, Jianghui Deng, Xin Qiu, Xianhua Chen
Summary: Measurement and quantitative characterization of aging-induced gradient properties is crucial for accurate analysis and design of asphalt pavement. This research proposes the composite specimen method to obtain asphalt binders at different depths within the mixture and uses dynamic shear rheometer tests to measure aging-induced gradient properties and reveal internal mechanisms. G* master curves are constructed to investigate gradient aging effects in a wide range. The study finds that the composite specimen method can effectively restore the boundary conditions and that it is feasible to study gradient aging characteristics within the asphalt mixture. The study also observes variations in G* and delta values and the depth range of gradient aging effects for different aging levels.
Article
Engineering, Multidisciplinary
Min Li, Kai Wei, Tianhe Xu, Yali Shi, Dixing Wang
Summary: Due to the limitations of ground monitoring stations in China for the BDS, the accuracy of BDS Medium Earth Orbit (MEO) satellite orbits can be influenced. To overcome this, low Earth orbit (LEO) satellites can be used as additional monitoring stations. In this study, data from two LEO satellites were collected to improve the precise orbit determination of the BDS. By comparing the results with GPS and BDS-2/3 solutions, it was found that including the LEO satellites significantly improved the accuracy of GPS and BDS-2/3 orbits.
