Article
Engineering, Mechanical
B. H. Soudmand, K. Shelesh-Nezhad
Summary: The addition of CaCO3 can increase the gear lifetime, reduce temperature and tooth wear in polymer nano-composite gears. The damage type and wear microstructure of nano-composite gears are different from regular gears, showing less plastic deformation.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
R. Mohsenzadeh, K. Shelesh-Nezhad, T. N. Chakherlou
Summary: Gear specimens based on POM containing nano-sized carbon black particles were produced and tested for wear and heat behavior. Results showed that carbon black reinforced POM gears exhibited improved wear and heat resistance, with a correlation between DMTA results and gear performance observed. Various strengthening mechanisms were detected for the nanocomposite gear samples.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Ning Mei, Aiping Song, Chenwei Yu, Jianzhou Pan
Summary: This paper proposes an offset laser measurement method for gears, which increases measurement accuracy and stability by changing the distance of the laser beam offset from the center of the gear, making it suitable for precision gear measurement.
Article
Engineering, Mechanical
Bing Cao, Guolong Li
Summary: A design model and plunge shaving model for beveloid gears were developed, analyzing the effect of shaving cutter parameters and installation errors on shaving precision. The proposed models were verified in a simulation platform for beveloid gear plunge shaving.
MECHANISM AND MACHINE THEORY
(2021)
Article
Polymer Science
Christoph Herzog, Michael Wolf, Dietmar Drummer
Summary: The wear behavior of PBT-steel gear sets under temporarily changed load has been investigated using an in situ gear test rig. The results show that the applied load spectrum determines the resulting tooth flank wear, and the load history also plays an important role in the wear behavior.
Article
Engineering, Multidisciplinary
Predrag Zivkovic, Miroslav Milutinovic, Milan Tica, Spasoje Trifkovic, Ivica Camagic
Summary: The reliability study is crucial in engineering design and involves the application of probability and unreliability modeling to evaluate the future performance of a product. In this case, the reliability of gear planetary power transmissions was assessed through statistical analysis and the use of the Weibull model to determine the failure probability of gear teeth. A competitive risk model was also developed for a more accurate assessment of reliability.
EKSPLOATACJA I NIEZAWODNOSC-MAINTENANCE AND RELIABILITY
(2023)
Article
Engineering, Mechanical
Fangyan Zheng, Jun Zhang, Ligang Yao, Rulong Tan
Summary: Recent studies have shown that proper cutter modification can enhance the wear resistance of gears, reducing wear and increasing the gear's lifespan.
Article
Mechanics
Bikramjit Singh, R. S. Mulik, S. P. Harsha
Summary: In this study, static and vibration analyses of functionally graded gears (FGGs) were conducted using a numerical method. The results were compared with bi-material gears and steel gears to evaluate the performance differences.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Mechanical
Juyub Lee, Sangmin Yun
Summary: In this research, a series of analysis and validation were conducted to estimate the fatigue life of plastic gears. A jig for depicting assembly state in vehicle actuators was made based on failure mechanism analysis. Vibration test for detecting the resonance frequency was performed, and finite element analysis was conducted to obtain the maximum stress and calculate the cycles to failure. The fatigue life model for plastic gears was established based on the relation between stress and cycles to failure.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Lixuan Zheng, Tao Yang, Song Xue, Guangming Li, Xuedong Liu
Summary: The study found that the premature failure of the conjunction gear in vehicles was caused by inadequate heat treatment, resulting in a shallow hardening depth of the tooth surface. Additionally, micro cracks formed on the tooth surface under impact load, while the unqualified heat treatment led to the formation of upper bainite in the material, reducing impact toughness and accelerating crack growth. Element segregation increased material brittleness and decreased the ability to resist crack propagation.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Marcell Suranyi, Christian Reinbrecht, Hubert Huemer
Summary: This study focuses on detecting gear cracks in ultra low speed, high load planetary gears and proposes a new condition monitoring method to achieve the goal of detecting cracks and tracking crack propagation in differential gears under realistic test conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Yin Zhang, Hui Zhang, Yixiong Yan, Pengfei Zhu
Summary: Combining tooth surface induction heating and shot peening is an efficient method to improve tooth surface performance. This study designed a longitudinal coil and a transverse coil to precisely control the tooth surface temperature field. Numerical simulations and heating experiments validated the advantages of the longitudinal coil in achieving a uniform temperature field and efficient heating, providing a prerequisite for shot peening.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Seyit M. Demet, Ali S. Ersoyoglu
Summary: The study found that the performance of asymmetrical spur gears increased by nearly 90% compared to symmetrical spur gears at the same torque values. While symmetrical spur gears break at the tooth root, asymmetrical spur gears with a 20 degrees/25 degrees pressure angle were more prone to tooth flank fractures, negatively affecting fatigue performance.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2021)
Review
Engineering, Multidisciplinary
Pradeep Kundu, Ashish K. Darpe, Makarand S. Kulkarni
Summary: This article discusses diagnostic and prognostic approaches developed for gears, including physics-based, data-driven, and hybrid methods. It summarizes the application of different fault processing techniques and discusses data processing methods for extracting fault-related information from raw vibration signals.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2021)
Article
Computer Science, Interdisciplinary Applications
Ruo Wu, Peitang Wei, Zehua Lu, Huaiju Liu, Damijan Zorko, Huaijie Xie
Summary: The applications of polymer gears have expanded from motion transmission to power transmission fields. The design of new gear teeth profiles is crucial for replacing metallic gears with polymer ones. This study developed a computational framework for generating tooth profiles and predicting fatigue life of S-shaped and involute POM gears. The performances of S-shaped and involute POM gears under oil lubrication were studied and compared. It was found that the S-shaped profile reduced tooth root stress by 25% and significantly improved bending fatigue life by 10 times compared to the involute profile, especially under medium or high loading levels. Furthermore, the S-shaped gear with a single circular-filleted root curve showed a 20% reduction in tooth root stress and a 30% increase in bending fatigue life compared to a double circular-filleted root curve S-shaped gear.
JOURNAL OF COMPUTATIONAL DESIGN AND ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Josip Brnic, Marino Brcic, Sebastian Balos, Goran Vukelic, Sanjin Krscanski, Mladomir Milutinovic, Miroslav Dramicanin
Summary: The paper presents experimental investigations on the mechanical properties of unalloyed high quality steel S235JRC + C (1.0122) under high temperature, creep, and mechanical fatigue conditions. The material's response at different temperatures is shown through engineering stress-strain diagrams, creep behavior is depicted using creep curves, and a fatigue diagram is constructed based on mechanical fatigue tests. The study determines the tensile strength, fatigue limit, and creep resistance of the material under different conditions.
Article
Engineering, Mechanical
B. Zandinava, R. Bakhtiari, G. Vukelic
Summary: This study investigated the API 5L X60 pipes used in an Iranian refinery and found the presence of sulfur dioxide and MnS impurities, which may lead to hydrogen-induced cracking. The mechanical testing results showed that the steel exhibited good ductility and was less likely to experience hydrogen embrittlement.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Civil
Goran Vukelic, Goran Vizentin
Summary: This study investigated the failure of two steel pressure vessels during hydrostatic test at a pressure lower than test pressure. It was found that pitting corrosion at the bottom part of the vessel was the cause of cracks, and the possibility of retaining functionality using composite patch repair procedure was assessed and confirmed by experimental investigation. Recommendations were provided to prevent future failures of similar pressure vessels.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Marine
Goran Vukelic, Goran Vizentin, Spiro Ivosevic
Summary: This study investigates the mechanical properties of shipbuilding steel exposed to marine environments for an extended period of time. The results indicate that sea tide has the most negative impact on the steel's mechanical properties, with significant deterioration occurring within the first six months of exposure.
SHIPS AND OFFSHORE STRUCTURES
(2022)
Article
Engineering, Mechanical
Goran Vukelic, Goran Vizentin, Spiro Ivosevic, Zeljko Bozic
Summary: This research investigates the changes in mechanical properties and surface condition of welded steel structures exposed to natural marine environment. By conducting standardized stress-strain and impact tests, the study provides insights into the variations in material strength, impact energy, corrosion rates, and the microscopic inspection of corroded surfaces.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Marine
Goran Vizentin, Goran Vukelic
Summary: In this study, a model for predicting the fatigue life degradation of fiber-reinforced composite materials in real marine environments is proposed. The model is based on data collected during previous research and a regression analysis is conducted to develop a mathematical model of strength degradation over time. The findings of this research have important implications for the design and utilization of composite materials.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Mechanical
Goran Vizentin, Goran Vukelic
Summary: This paper presents the final results of a 2-year research on the mechanical property changes of FRP composites in a real marine environment. Realistic input parameters for structural modeling of marine structures can be obtained by conducting prolonged tests in the sea. The research found that seawater absorption and microbiology growth caused an increase in sample mass, and the layout configuration of the fibers was correlated with the loss of tensile strength.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Marine
Spiro Ivosevic, Natasa Kovac, Nikola Momcilovic, Goran Vukelic
Summary: The longitudinal girder between fuel oil tanks and water ballast tanks in ship double bottoms is critical for the watertightness of the structure and can be compromised by corrosion. The new common structural rules provide guidelines for minimum thickness values and corrosion margins. This paper analyzes the relationship between the built-in thickness of the longitudinal girder and the percentage of plate wear due to corrosion, using data from 20 ships and 1918 corrosion depth values. The findings aim to optimize corrosion margins and prevent structural collapse and pollution.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Review
Engineering, Marine
Goran Vukelic, Dario Ogrizovic, Dean Bernecic, Darko Glujic, Goran Vizentin
Summary: This paper reviews the use of VR technology in maritime firefighting and evacuation training, highlighting the current state of its implementation and identifying research gaps in the maritime industry.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Proceedings Paper
Construction & Building Technology
Goran Vizentin, Goran Vukelic
Summary: Fiber reinforced polymer (FRP) composites have extensive application potential in marine structures. Long-term immersion tests were conducted on samples with different fiber layouts, and changes in mass, marine microbiology growth, tensile strength, and morphological structures were analyzed. The results showed that all samples experienced increased mass due to seawater absorption and microorganism growth in the organic resins used as matrix materials. The extent of decrease in tensile strength depended on the fiber layout configuration. The morphological changes in the samples were primarily attributed to salt crystal formation and the impact of sea microorganisms embedding in the resin.
4TH INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY (ICSI 2021)
(2022)
Article
Engineering, Marine
Goran Vukelic, Goran Vizentin, Ana Peric Hadzic
Summary: This paper assessed the possibility of using modern technologies to study the evacuation of passengers from ships and demonstrated the great potential for implementing VR and AR technologies within the shipping industry, with recommendations for their use presented.
SCIENTIFIC JOURNALS OF THE MARITIME UNIVERSITY OF SZCZECIN-ZESZYTY NAUKOWE AKADEMII MORSKIEJ W SZCZECINIE
(2021)
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)
