Article
Materials Science, Multidisciplinary
Haiyang Lu, Yanle Li, Fangyi Li, Jianfeng Li, Liming Wang, Xueju Ran, Zhen Li, Lin Kong
Summary: The study proposes a novel coating structure by combining two different coatings to improve erosion wear resistance at different impact angles, effectively prolonging the life of the impeller. The experimental results validate the proposed erosion rate model with an error within 9.15%, demonstrating the ability to regulate erosion rate along the entire eroded surface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Green & Sustainable Science & Technology
Jianhui Qiu, Minghua Tian, Debin Zhu, Chongchun Xiao, Bin Wen, Feng Bin, Hao Chen, Daolin Wang
Summary: Cemented paste backfill (CPB) is widely used in mines to treat tailings by preparing them as aggregate for highly concentrated slurry transportation to the underground mining area. However, the pipeline resistance loss and erosion wear during CPB slurry transportation considering the coupling effect of inlet velocities, viscosities, and particle sizes have not been well evaluated. In this study, a CFD-based three-dimensional network simulation was used to analyze the CPB slurry flow in an L-shaped pipe with different combinations of the three parameters. The findings provide important insights for the design of CPB pipeline transportation in order to improve the safety and economic level of a mine.
Article
Engineering, Mechanical
Mohanad Zalzalah, Roger Lewis, Tom Slatter
Summary: This work introduces a new model to predict wear resulting from impacts between solid bodies, which is a less investigated primary wear mechanism. The model considers shear force during contact, and has been validated for three common metal alloys, showing good correlation with experimental data.
Article
Chemistry, Physical
Tomas Prasil, Ladislav Socha, Karel Gryc, Jana Svizelova, Mariola Saternus, Tomasz Merder, Jacek Pieprzyca, Martin Graf
Summary: This paper presents the results of rotor wear tests conducted during the refining process of the AlSi9Cu3(Fe) alloy in industrial conditions. The efficiency of the rotor in terms of its service life and work efficiency is assessed, and material losses during operational tests are revealed through the comparison of CAD models and 3D scans.
Article
Materials Science, Multidisciplinary
Yongjin Wang, Renbo Song, Liang Huang
Summary: The study found that the morphology, distribution, and stability of retained austenite in bainitic ductile iron have a significant impact on wear resistance. Thin film retained austenite improves wear resistance, while a large amount of low stability and bulky retained austenite reduces wear resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Composites
Harun Sepetcioglu, Seyit Mehmet Demet, Mehmet Bagci
Summary: Reinforced basalt fiber reinforced polymer (BFRP) composite pipes were prepared using non-functionalized graphene nanoplatelets (GnPs) as reinforcement material, and enhanced solid particle erosion (SPE) resistance was achieved. The GnPs contributed to an improvement of approximately 10%-55% in erosive wear resistance of the non-reinforced BFRP composite pipes. Scanning electron microscopy (SEM) analysis revealed the significant effect of GnPs on the erosion micro-mechanisms of the composite pipes.
POLYMER COMPOSITES
(2023)
Article
Multidisciplinary Sciences
Jonathan M. Ludwicki, Vanessa R. Kern, Joshua McCraney, Joshua B. Bostwick, Susan Daniel, Paul H. Steen
Summary: This article investigates the joint experimental and numerical study of water droplets on surfaces with different wetting properties. By comparing the data from experiments and numerical simulations, it is found that the Davis-Hocking model with the measured mobility parameter performs better in describing wetting phenomena.
Article
Engineering, Mechanical
Lukas Widder, Harald Rojacz, Karl Adam, Andreas Kuttner, Markus Varga
Summary: Material processing of loose goods is commonly found in heavy industries like steel production. However, the wear protection materials used in transportation, relocation, and other processing routines are often suboptimal due to a lack of understanding of the prevailing loads and wear mechanisms. This study aims to identify wear mechanisms in different applications and evaluate the suitability of wear solutions. Lab experiments were conducted to simulate various forms of abrasive and impact-abrasive wear, using ten common wear protection materials. Based on the wear results, a selection map was created to guide the choice of wear protection solutions for specific load conditions in material handling, increasing sustainability.
Article
Environmental Sciences
Xinyue Zhang, Tao Lin, Fuchun Jiang, Xue Zhang, Shiyu Wang, Shisheng Zhang
Summary: Pipe material and chlorination significantly influence the structure and microbial community of biofilms, with polyethylene showing lower biomass and microbial diversity. Chlorination inhibits bacterial colonization and influences the functional traits of certain bacteria genera.
Article
Dentistry, Oral Surgery & Medicine
Leticia Oba Sakae, Ana Luisa Meira Renzo, Itallo Emidio Lira Viana, Samira Helena Niemeyer, Thiago Saads Carvalho, Tais Scaramucci
Summary: This study investigated the effects of different toothbrushing protocols on the progression of erosive tooth wear using in vitro experiments. The results showed that the brushing movement and toothpaste dilution ratio were associated with enamel surface loss. Therefore, these factors should be taken into consideration when comparing results from different studies.
ARCHIVES OF ORAL BIOLOGY
(2023)
Article
Engineering, Multidisciplinary
Lu Liu, Yu Wang, Kai Zhang, Lingrong Kong
Summary: In this study, slurry erosion experiments and computational fluid dynamics simulations were conducted to investigate the effect of particle impact velocity and erosion mechanisms on the surface of 38CrMoAlA steel. The results showed that uneven erosive wear occurred on the surface of clearance material, which can be attributed to the variation of particle impact angle affected by fluid streamlines. The most severe erosion site and area changed with the particle impact velocity, and the failure of the clearance material was mainly caused by localized erosion wear. To prolong the service life of downhole tools, the region downstream of the clearance inlet (10 mm from the inlet) should be given priority.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Automation & Control Systems
Yadong Chen, Jiayuan Shan, Junhui Liu, Jianan Wang, Ming Xin
Summary: This article proposes an impact time and angle constrained guidance law using a range-based line-of-sight shaping strategy. The LOS angle can be shaped as a polynomial function of range-to-go, and the coefficients of the polynomial function are determined by boundary conditions and solved through an integral equation. Simulation studies demonstrate the effectiveness of the proposed guidance law.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2022)
Article
Engineering, Civil
Konstantinos Antoniou, Aris G. Stamou, Spyros A. Karamanos, Christos Palagas, Athanasios Tazedakis, Efthimios Dourdounis
Summary: A numerical method for simulating the JCO-E pipe fabrication process is developed in this study. The simulation calculates the deformation and stresses induced by various manufacturing processes, including edge crimping, JCO forming, LSAW welding, and expansion. The material model is improved to account for plate anisotropy and accurately simulate the welding process. The results show that expansion can reduce ovalization and residual stresses in the pipe, and there is an optimal range of expansion strain for achieving maximum collapse pressure.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Yuzhou Du, Xiaolong Wang, Dongya Zhang, Xin Wang, Chunpeng Ju, Bailing Jiang
Summary: The nanobainitic matrix in ductile iron, composed of nanoscale a phase and carbon-riched g phase, exhibits superior strength and wear resistance compared to conventionally forged steel GCr15. This is attributed to the homogeneous distribution of spheroidal graphite, resulting in a low friction coefficient and moderate strength in ductile iron.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Coatings & Films
Ali Gunen, Erdogan Kanca, Mustafa Serdar Karakas, Mustafa Sabri Gok, Muge Kalkandelen, Bulent Kurt, Melik Cetin, Ismail Hakki Karahan
Summary: The Cr-V-C coatings grown on ductile iron using TRD exhibited superior thermal fatigue and wear resistance, mainly due to the dissolution of graphite nodules during the TRD process. Increasing the number of cycles led to increased flaking and decreased wear resistance in both the coatings and the untreated ductile iron.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Andrzej Kubit, Mateusz Drabczyk, Tomasz Trzepiecinski, Wojciech Bochnowski, L'ubos Kascak, Jan Slota
Article
Chemistry, Physical
Jan Slota, Andrzej Kubit, Tomasz Trzepiecinski, Bogdan Krasowski, Jan Varga
Summary: This study proposed a novel method for manufacturing rib-stiffened panels using single point incremental forming, and investigated the deformation characteristics of panels through axial compression tests. The results revealed two distinct buckling modes in the panels, which can be attributed to the interaction of the rotating tool on the surface of the formed ribs causing different transverse and longitudinal springback behaviors.
Article
Automation & Control Systems
Miroslav Neslusan, Martin Pitonak, Jiri Capek, Pavel Kejzlar, Libor Trsko, Katarna Zgutova, Jan Slota
Summary: This study investigates the rate of transformation induced plasticity in TRIP steel after plastic straining using Barkhausen noise emission. The samples were analyzed using SEM, XRD, and microhardness to study residual stress and microstructural alterations caused by uniaxial tensile test. It was found that Barkhausen noise decreases with increasing plastic straining and reaches saturation in a certain strain region. Samples after the tensile test exhibit marked magnetic anisotropy.
Article
Chemistry, Physical
Andrzej Kubit, Tomasz Trzepiecinski, Elzbieta Gadalinska, Jan Slota, Wojciech Bochnowski
Summary: The study investigated the effect of parameters of refill friction stir spot welding (RFSSW) on the fracture load and failure mechanisms of resulting joints. Through numerical simulations and experimental results, the load capacity under different failure modes for given welding parameters was determined.
Article
Chemistry, Physical
Jan Fuzer, Samuel Dobak, Ivan Petryshynets, Peter Kollar, Frantisek Kovac, Jan Slota
Summary: This study investigates the impact of cutting clearance on the magnetic performance of electrical steel through experiments and analysis, and evaluates the combined effects of cutting clearance, frequency, and heat treatment on magnetic losses.
Article
Chemistry, Physical
Andrzej Kubit, Tomasz Trzepiecinski, Rafal Kluz, Krzysztof Ochalek, Jan Slota
Summary: The aim of this research was to select optimal friction stir welding (FSW) parameters for joining stiffening elements to a thin-walled structure made of aluminium alloy sheets. A full factorial Design of Experiments plan was used to determine the load capacity and dispersion of the joint. Multi-criteria optimization was then carried out to identify the most favorable combination of parameters. The optimal parameters were determined using a regression equation assessed by the Fisher-Senecor test.
Article
Chemistry, Physical
Andrzej Kubit, Raheem Al-Sabur, Andrzej Gradzik, Kamil Ochal, Jan Slota, Marcin Korzeniowski
Summary: Low weight and high strength are significant factors in the spread of composite sandwich materials in the current decade. This study investigates the residual stress in the LITECOR (R) sandwich material formed using the SPIF process using the X-ray diffraction method. The results show that the residual stress is inversely proportional to the thickness of the plastic core.
Article
Metallurgy & Metallurgical Engineering
Lubos Kascak, Denis Cmorej, Jan Slota, Emil Spisak, Jan Varga
Summary: The study focuses on different materials joining methods in the automotive industry, specifically mechanical joining combined with adhesive bonding. Results show that samples joined by clinching method combined with epoxy resin adhesives achieved higher load-bearing values, with no cracks or any other type of failures observed in these joints.
ACTA METALLURGICA SLOVACA
(2022)
Article
Chemistry, Physical
Tomasz Trzepiecinski, Jan Slota, Lubos Kascak, Ivan Gajdos, Marek Vojtko
Summary: This paper presents a method for determining the kinematic friction coefficient of aluminium alloy sheets, using strip drawing test and scanning electron microscopy. It reveals that lubricant viscosity has the greatest impact on the coefficient of friction.
Editorial Material
Chemistry, Physical
Dariusz Fydrych, Andrzej Kubit, Jan Slota, Agnieszka Kowalczyk
Article
Metallurgy & Metallurgical Engineering
B. Krasowski, A. Kubit, T. Trzepiecinski, J. Slota
Summary: This paper presents the experimental research on the fabrication of thin-walled panels with longitudinal stiffening ribs using the single point incremental sheet forming technique. The influence of forming parameters and tool strategy on surface quality and rib formation was investigated. The results were used to validate finite element simulations. The tool path strategy was found to be the main factor affecting formability and surface finish.
ARCHIVES OF METALLURGY AND MATERIALS
(2022)
Article
Engineering, Mechanical
Jan Slota, Andrzej Kubit, Ivan Gajdos, Tomasz Trzepiecinski, L'ubos Kascak
Summary: This study investigates hardfacing deposits using materials of different surface hardness using an innovative strategy for tribological testing. The abrasive wear behavior of AISI 316L stainless steel is compared to two different alloys deposited on a substrate of S355JR steel. Modified scratch tests were used to evaluate the tribological behavior and wear mechanisms of these materials, and the results were validated using three-body abrasion tests. The study shows that the modified scratch test method can shorten the time needed to predict the abrasive behavior of materials.
Article
Engineering, Mechanical
Tomasz Trzepiecinski, Andrzej Kubit, Jan Slota
Summary: The article presents the results of tribological investigations into the steel/polymer/steel sandwich material LITECOR (R) developed by ThyssenKrupp Steel Europe for automotive applications. The study found that sheet deformation affects the coefficient of friction, and lubrication can improve the lubrication effectiveness of pre-strained sheets.
Article
Engineering, Multidisciplinary
L'ubos Kascak, Denis Cmorej, Emil Spisak, Jan Slota
Summary: The use of high-strength sheets in car body manufacturing is favored due to their good formability, fatigue resistance, and ability to absorb impact energy. Mechanical joining, such as clinching, is an innovative technique used to join these materials. The load-bearing capacity of clinched joints is lower compared to resistance spot welded joints.
ADVANCES IN SCIENCE AND TECHNOLOGY-RESEARCH JOURNAL
(2021)
Article
Metallurgy & Metallurgical Engineering
E. Spisak, J. Majernikova, L. Kascak, J. Slota
Summary: This study investigates the use of thin steel sheets in food packaging production, with a focus on the impact of plastic deformation on their properties, comparing the effects of different experimental methods on sheet properties.
Article
Engineering, Mechanical
Willy Ank de Morais, Railson Bolsoni Falcao, Mario Boccalini Jr, Fernando Jose Gomes Landgraf
Summary: This study compares the fatigue behavior of bcc Nb-48 wt%Ti (Ti-36at%Nb) alloy parts processed by Laser Powder Bed Fusion (L-PBF) using two different types of powders (spherical powder produced by Plasma Atomization and irregularly shaped powder produced by Hydride-Dehydride). The results show that the fatigue behavior is similar for both powders, but the specimens produced from the Hydride-Dehydride powder have higher dispersed results. Fracture primarily occurs in the porosities near the machined sample surface, and the fatigue cracks propagate in a zigzag mode parallel to the L-PBF building direction.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Guoxi Jing, Shuai Sun, Teng Ma, Shubo Li, Tian Ma, Junchao Wei, Jianchao Pang
Summary: This study proposes a parameter identification method for predicting the TMF life of CGI materials used in cylinder heads. The study evaluates the TMF behavior of RuT450 material and successfully predicts its TMF life using multi-objective optimization. The results highlight the influence of plastic strain amplitude, temperature, and strain rate on the damage mechanism and life prediction.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xin Zhang, Xu Li, Weipeng Xu, Kuidong Gao, Kao Jiang, Xinyu Wang, Hongxin Wei
Summary: Conical picks are commonly used in tunnel excavation and often experience high temperatures during the cutting process. This study investigated the influence of temperature on the wear of conical picks and proposed a method for measuring rock abrasiveness that takes into account the thermal effect. The experimental results showed that cooling liquid reduced the maximum temperature and the mean mass loss of the conical pick. Additionally, the study examined the characteristics of oxygen and found evidence of peeling, cracking, and oxidation on the grinding rod used for rock abrasiveness measurement.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Vivek Srivastava, Deependra Singh, A. G. Rao, V. P. Deshmukh
Summary: Engine gear failures are a significant concern in various industries. Investigating each gear failure and determining the root cause is important for preventing future failures. This study used experimental and numerical analysis techniques to investigate the premature failure of a flywheel gear in a marine diesel engine. The findings revealed that the gear failed due to overload stresses caused by overload torque generated from sudden inertial thrust in the internal combustionengine.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Jun Zhang, Weidong Liu, Feilong Liu, Zhiqiang Yang, Jinfang Peng, Minhao Zhu
Summary: During a major overhaul of an aeroengine, a cracked stator vane of the low-pressure compressor was discovered, with the crack originating from a corrosion pit located on the arc transition between the leading edge and the upper edge plate. The fracture surface exhibited signs of fatigue cracks, indicating a pit-related fatigue crack. Metallographic examination revealed that most corrosion pits were distributed beneath the bulging or peeling paint layer on the leading edge and the concave side. Identification of the corrosion products showed the presence of sulfate and alumina, suggesting atmospheric corrosion as a likely cause for the cracked stator vane.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Juan Jose Jimenez de Cisneros Fonfria, Ester Olmeda, Susana Sanz, Maria Garrosa, Vicente Diaz
Summary: Energy absorbing devices in vehicles can partially transform impact energy and protect passengers. In this paper, the failure analysis of the underframe crumple zone in a train car was conducted through finite element simulations, showing that the component acted properly after the impact.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Fengqi Zhang, Gang Luo, Haiyang Zhang, Peihong Cong, Lulu Liu, Wei Chen
Summary: In this study, a predictive model for bird strike trajectory was developed based on the quasi-linear viscoelastic model. By combining simulation analysis under multiple conditions, the model reproduced the trajectory change law in low and medium speed bird impact experiments.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
S. M. de Gouveia, L. de Abreu Correa, D. B. Teles, M. Oliveira, T. G. R. Clarke
Summary: Emergency Shutdown Valves (EDSVs) are used in industrial applications to interrupt fluid flow during hazardous events. The damage to the valve seats can be detected by analyzing the pressure and torque data. This study compared three processing options and found that evaluating the complete signature with a Gradient Boosting Classifier algorithm is the most effective strategy.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xinyan Jin, Kai Wang, Hongwei Qian
Summary: This study investigated the root cause of an abnormal premature groove-clogging failure on a sink roll in a hot-dip galvanizing line. It was found that the failure was caused by the buildup of a large amount of Fe2Al5Znx dross in the grooves, and the key factor was the control of Tstrip.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Zhiqiang Li, Jie Li, Cen Li, Xiaodong Xie, Zhiyong Yang
Summary: In this study, the microstructure evolution of the material in the hot spot area of the high-speed train brake disc was observed and the mechanism of mechanical property degradation was obtained through tensile tests. The research results provide guidance for crack damage identification of the brake disc and condition-based maintenance.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Lijia Luo, Yincheng Wang, Wei Chen, Zuming Zhao, Wenfei Chen, Shiyi Bao
Summary: Tube-to-tube impact wear is a significant factor in the failure of alloy 690 tubes in nuclear steam generators. This paper investigates the wear damage mechanism and detection method of alloy 690 tubes under tube-to-tube impact loads. The results reveal the wear damage mechanism through analysis of macro and micro morphologies as well as metallographic structures. A nonlinear ultrasonic wave mixing method is proposed for damage detection and a detection device is developed to implement this method. Experimental results indicate that the damage mode of tube-to-tube impact wear varies with impact load and cycle number, and the nonlinear modulation index is effective in assessing the damage degree of alloy 690 tubes.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xing-Ju Yang, Feng Lin, Xu Du, Lu Qiu
Summary: This paper proposes a novel method of improving the progressive collapse resistance of RC frame structures by adding locally debonded kinked steel plates (KPs). Experimental tests and finite element analysis reveal that the addition of KPs significantly enhances the ultimate resistance and deformability of the beam-slab substructures. The mechanism of resistance improvement is explained, and an analytical model is developed for predicting the ultimate resistance of the structures.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Xiaohe Wang, Zengqiang Cao
Summary: This paper presents a dynamic installation (DI) method based on electromagnetic force to reduce damage to composite laminates and improve joint performance. The study shows that DI can effectively decrease installation resistance, reduce severe damage to laminates, and improve stress distribution in the joint.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Jitong Cui, Yingying Kong, Cuiwei Liu, Baoping Cai, Faisal Khan, Yuxing Li
Summary: This paper presents a method for quantifying the failure probability of hydrogen doped pipelines and utilizes Bayesian network for quantitative calculation. The results show that this method can more accurately assess the failure probability of hydrogen doped pipelines and provide a decision basis for preventing failure accidents.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Yiping Jiang, Maoru Chi, Jungang Yang, Liangcheng Dai, Yuchen Xie, Zhaotuan Guo
Summary: This article investigates and simulates the derailment of empty freight trains at the switch section of a turnout in the diverging route, and proposes preventive measures. The results show that the derailment is caused by the combined effect of various factors, and reducing the longitudinal coupler force and the wheel rail friction coefficient can decrease the possibility of derailment. Additionally, installing a guard rail in front of the turnout can effectively prevent derailment.
ENGINEERING FAILURE ANALYSIS
(2024)
