Article
Chemistry, Physical
Frantisek Fojtik, Jan Papuga, Martin Fusek, Radim Halama
Summary: The paper describes the estimation of fatigue strength on hollow specimens made from CSN 41 1523 structural steel using selected multiaxial fatigue strength criteria and compares the results with experimental data. The PCRN method and QCP method show the best performance in predicting fatigue strength, while the MMP criterion provides slightly lower results but offers a quick assessment of multiaxial fatigue loading.
Article
Engineering, Mechanical
Bernd M. Schoenbauer, Michael Fitzka, Ulrike Karr, Herwig Mayer
Summary: The study found that 17-4PH stainless steel exhibited similar critical stress amplitudes for surface and internal failure under constant amplitude (CA) and variable amplitude (VA) loading in high cycle fatigue conditions. For VA loading, failure occurred at Miner damage sums ranging from 0.1 to 0.9 (surface failure) and 0.2 to 2.2 (internal failure). It is acceptable to omit stress amplitudes less than 60% of the maximum amplitude for VA studies in the very high cycle fatigue regime.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Shengwei Qin, Chenghao Zhang, Bang Zhang, Haiyang Ma, Minghao Zhao
Summary: This research studied the effects of carburizing process on the material properties and fatigue performance of 18CrNiMo7-6 gear steel. The evolution processes of hardness, microstructure, and residual stress of carburized specimens during fatigue testing were observed, and the initiation of fatigue cracks and the transformation of retained austenite were analyzed. The results showed that the fatigue strength of carburized specimens increased and then decreased with the increase of effective case depth, and the fatigue failure mode changed from surface failure to internal failure after carburizing.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Mechanical
Piotr Swacha, Adam Lipski
Summary: This paper presents the results of HCF and VHCF tests on the S355J2+N steel using an ultrasonic testing machine. The tests involved preliminary tests for material identification, finite element analysis for specimen geometry, and fatigue tests using an ultrasonic system. The fatigue tests determined the fatigue limit and analyzed the different types of fatigue fracture surfaces. The results provide insights into the upper load limit for testing this material in both VHCF and HCF regimes on the ultrasonic testing machine, which is lower than the linear relationship between stress and strain in a tensile test.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Lu Ke, Furui Zhu, Zheng Chen, Zheng Feng, Jiale Zhou, Youlin Li
Summary: Fatigue tests were conducted on CFRP-steel double lap shear joints to investigate the fatigue failure mechanisms. Probabilistic S-N curves based on four statistical models were used to discuss the scatter characteristics of fatigue life. The results showed that the fatigue life decreased with the increase of load level, and interface debonding was the primary failure mode. The two-parameter Weibull model was recommended for fatigue life design due to its good fit and reliability.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Fanyu Zeng, Yongtai Yang, Guian Qian
Summary: This study investigates the fatigue properties of 316L stainless steel manufactured with selective laser melting technology and hot-isostatic-pressing heat-treatment. The results show that the resistance to high-stress fatigue fracture is significantly improved by using HIP heat-treatment.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Mechanical
Yipeng Liu, Guoxi Jing, Hai Liu, Weibin Zhang, Mengyu Han, Sen Xiao, Zhongwei Zhang
Summary: This study focuses on the failure analysis and design improvements of a steel piston for a marine engine. By simulating durability test and assessing high-cycle fatigue strength, it is found that the excessive stress amplitude caused by alternating gas pressure is the root cause of steel piston failure. A new scheme is designed by improving the local structure of the piston, which successfully enhances the fatigue strength and verifies the effectiveness of the design improvements.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Huixing Li, Futao Dong, Qingjun Zhou, Zhiming Shi, Jeffrey Venezuela, Ming Yan, Ruth Knibbe, Mingxing Zhang, Andrej Atrens
Summary: The load-controlled fatigue behavior of a dual-phase advanced high-strength steel was studied in air and with hydrogen. The fatigue lives with hydrogen and in air were not significantly different, but hydrogen had a clear influence on the fatigue fractography. The hydrogen diffusion coefficient and hydrogen content were evaluated using hydrogen permeation experiments.
Article
Construction & Building Technology
Jianmin Hua, Fei Wang, Xuanyi Xue, Ziheng Ding, Yingzhi Sun, Lei Xiao
Summary: Research on the service properties of HSS after a fire is crucial for evaluating its ability to continue functioning. Through ULCF tests and analysis, the bearing capacity and fatigue performance of Q690 HSS after a fire can be understood, and prediction equations can be proposed for evaluation.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Pengfei Wang, Weiqiang Wang, Ming Zhang, Qiwen Zhou, Zengliang Gao
Summary: The effects of specimen size and welded joints on the very high cycle fatigue properties of compressor blade steel KMN-I were studied through ultrasonic fatigue testing. It was found that large specimens exhibited a slow decline in the S-N curve above 10^7 cycles, while welded specimens showed less obvious variations in the very high cycle fatigue characteristics. Metallographic observation and SEM analysis revealed differences in fracture mechanisms between large and welded specimens, with cracks initiating from different sources. Additionally, the formation mechanism of GBF was analyzed, and the predicted fatigue strength and life were consistent with experimental results.
Article
Engineering, Mechanical
Y. Murakami, M. Endo
Summary: A prediction method for S-N curves without fatigue tests is proposed in this study. The method is based on the small crack (m*) growth model and predicts S-N curves for various materials. The predicted curves are compared with experimental data, showing good agreement for conservative predictions.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Anis Mohabeddine, Jose Correia, Pedro Aires Montenegro, Abilio De Jesus, Jose Miguel Castro, Filippo Berto
Summary: The study evaluates experimental fatigue data of retrofitted non-cracked open-hole steel specimens with bonded CFRP, showing significant extension of fatigue life but decreasing extension ratio with higher stress levels. Probabilistic methods are adopted to model the complex behavior of CFRP retrofitted specimens, with the nonlinear CFC model fitting the data well and proposing P-S-N curves for these specimens.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Construction & Building Technology
Satoshi Yamada, Thaileang Touch, Yu Jiao, Takanori Ishida, Shoichi Kishiki
Summary: The experimental results revealed different cyclic deformation capacities of high-strength structural steel under strain-based cyclic loading tests. Specimens exhibited cyclic hardening behaviors in the initial cycles, with smaller strain testing leading to stabilization until failure, while larger strain testing caused ductile fracture without stabilization.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Mechanics
Adrian Tola, Matthew R. Eatherton, Ioannis Koutromanos
Summary: The article discusses the cyclic inelastic strains and ultra-low cycle fatigue fracture of structural steel components under extreme loading events. Experimental tests and finite element analysis were conducted to study the local stress and deformation states of 60 circumferentially notched samples under different stress conditions. The importance of experimental tests in reliably characterizing ultra-low cycle fatigue in structural steel is demonstrated through calibration of existing criteria.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Chenyang Huang, Letian Hai, Jianbo Jiang, Huiyong Ban
Summary: The high-cycle fatigue properties of titanium-clad bimetallic steel were studied experimentally. Fracture features after fatigue failure were analyzed, and basic mechanical properties were obtained. The fatigue performance of the TC bimetallic steel was found to be significantly higher than that of standard single-metal structural steel, and the fatigue design curves for conventional structural steel were found to be conservative. Fatigue cracks tend to initiate from the bonding interface and exhibit different propagation phenomena.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Ashish Aeran, Sudath C. Siriwardane, Ove Mikkelsen, Ivar Langen
INTERNATIONAL JOURNAL OF FATIGUE
(2017)
Article
Engineering, Mechanical
Ashish Aeran, Sabrina Vantadori, Andrea Carpinteri, Sudath C. Siriwardane, Daniela Scorza
INTERNATIONAL JOURNAL OF FATIGUE
(2019)
Article
Engineering, Mechanical
Ashish Aeran, Ruth Acosta, Sudath C. Siriwardane, Peter Starke, Ove Mikkelsen, Ivar Langen, Frank Walther
INTERNATIONAL JOURNAL OF FATIGUE
(2020)
Review
Engineering, Mechanical
Fredrik Bjorheim, Sudath C. Siriwardane, Dimitrios Pavlou
Summary: This paper reviews the existing techniques for fatigue damage detection and measurement, focusing on fatigue crack monitoring and fatigue damage monitoring. Parameters of these techniques are critically evaluated for choosing the suitable method for detecting fatigue crack or damage in materials or components.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Civil
Sudath C. Siriwardane
Summary: By introducing a mesoscopic plastic strain-based fatigue model, the fatigue damage of typical fillet welded details of orthotropic steel decks can be accurately evaluated, and simplified formulae are proposed to predict the multiaxial fatigue life of fillet welded detail, showing good agreement with experimental fatigue lives.
INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING
(2021)
Article
Engineering, Mechanical
Fredrik Bjorheim, Dimitrios G. Pavlou, Sudath C. Siriwardane
Summary: A nonlinear model is proposed in this paper to assess the cumulative fatigue damage under multistage loading based on the theory of isodamage curves. The stress function for the fatigue life exponent is derived using the S-N curve, and no adjusting parameters are necessary in the model.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Fredrik Bjorheim, Dimitrios Pavlou, Sudath C. Siriwardane
Summary: This study investigates the feasibility of using macroscopic hardness measurements to assess fatigue damage and finds that the Brinell hardness measurement method is more feasible and accurate.
INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY
(2022)
Article
Engineering, Ocean
Hadi Pezeshki, Dimitrios Pavlou, Hojjat Adeli, Sudath C. Siriwardane
Summary: An analytical solution is developed to study the dynamic response of offshore wind turbines under wave load. The solution considers nonlinear Stokes's wave theory, wave-structure and soil-foundation interactions. The effect of various factors, including wave-structure interaction, added mass, foundation stiffness, and nacelle translational and rotational inertia, on the structure's motion is investigated. The proposed analytical solution is compared to numerical results through a parametric study.
JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING-TRANSACTIONS OF THE ASME
(2023)
Article
Engineering, Multidisciplinary
Fridtjof Holst Oyasaeter, Ashish Aeran, Sudath C. Siriwardane
Summary: A new analytical formula is proposed to accurately determine the buckling capacity of patched corroded tubular members, considering initial imperfections and shifting of centroid due to corrosion. It is found that corrosion significantly reduces the buckling capacity of offshore jacket structures. The proposed formula can be easily applied by practicing engineers to conservatively estimate the remaining buckling capacity.
INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY
(2022)
Article
Engineering, Civil
Hadi Pezeshki, Hojjat Adeli, Dimitrios Pavlou, Sudath C. C. Siriwardane
Summary: The paper discusses the current state of the art in Structural Health Monitoring (SHM) methods for offshore and marine structures. While most SHM methods have been developed for onshore infrastructures, there is limited research on implementing SHM technologies in offshore and marine structures. The paper aims to address this gap and highlight the challenges in implementing SHM methods in these structures. It categorizes the available techniques for establishing SHM models in various offshore and marine structures and reviews recently developed signal processing, machine learning, and visualization methods. The paper provides a guideline for selecting and establishing SHM in these structures.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-MARITIME ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Kuleni Fekadu Yadeta, Sudath C. C. Siriwardane, Tesfaye Alemu Mohammed
Summary: Reliable estimations of the extent of corrosion and time required to reach specific safety limits are crucial for assessing the reliability of aging reinforced concrete (RC) bridges. This paper presents and compares different approaches for estimating the service life of corroded RC structures, and discusses the shortcomings and limitations of existing models.
INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY
(2023)
Proceedings Paper
Architecture
Sudath C. Siriwardane
PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE ON SUSTAINABLE BUILT ENVIRONMENT (ICSBE 2018)
(2020)
Proceedings Paper
Engineering, Civil
Sudath C. Siriwardane, Ranjith Dissanayake
PROCEEDINGS OF THE 25TH AUSTRALASIAN CONFERENCE ON MECHANICS OF STRUCTURES AND MATERIALS (ACMSM25)
(2020)
Proceedings Paper
Engineering, Marine
A. Aeran, S. C. Siriwardane, O. Mikkelsen, I. Langen
FIRST CONFERENCE OF COMPUTATIONAL METHODS IN OFFSHORE TECHNOLOGY (COTECH2017)
(2017)
Proceedings Paper
Engineering, Marine
Ashish Aeran, Sudath C. Siriwardane, Ove Mikkelsen, Ivar Langen
PROCEEDINGS OF THE ASME 36TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, 2017, VOL 3A
(2017)
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)