Article
Construction & Building Technology
Liang Fang, Zhongqiu Fu, Bohai Ji, Yuqiang Gao
Summary: In this study, the crack-growth characteristics at different lengths were investigated through numerical simulation and fatigue tests. Reasonable maintenance occasions and classified maintenance methods for diaphragm-to-rib welded joint cracks were proposed, which are of great significance for maintenance of such joints.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Computer Science, Interdisciplinary Applications
Yongtao Bai, Deborah C. Nardi, Xuhong Zhou, Ricardo A. Picon, Julio Florez-Lopez
Summary: Fatigue resistance is crucial for the life-cycle sustainability of materials and structures, yet predicting the fatigue resistance of structural members subjected to flexural forces remains a challenge. Developing a general lumped damage simulation model can offer a new perspective for quantifying fatigue-induced remaining life for engineering structures across elastic and plastic amplitudes.
COMPUTERS & STRUCTURES
(2021)
Article
Multidisciplinary Sciences
Peter M. Sarosi, Jevan Furmanski, William C. Reese, Donald L. Carpenter, Mikel A. Nittoli, Michael G. Myers, Nicole M. Callen, Thirumalai Neeraj
Summary: Damage evolution during fracture of metals plays a crucial role in the reliability and integrity of infrastructure. In this study, a correlative microscopy framework was developed to observe fracture mechanisms in a steel inclusion system. The damage was found to be inhomogeneous and anisotropic, with fracture resistance being controlled by inclusion distribution and size scale. The use of laboratory X-ray microtomography was demonstrated as an accessible alternative for characterizing damage in dense metals like steel. This framework offers a means to study degradation phenomena and accelerate discovery of new materials solutions.
Article
Engineering, Mechanical
WangSub Shin, Kyong-Ho Chang, Shazia Muzaffer
Summary: The research analyzed the fatigue performance of cruciform fillet welded joints with full and incomplete penetration under load carrying and non-load carrying conditions. It was found that welding deformation, residual stresses, and stress magnitude affect the fatigue crack initiation and fatigue life of welded structures.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Du Mingqing, Su Jie, Wang Xuchun, Zhang Sulei, Zhang Yongjun
Summary: This study investigates the vibration characteristics of a lossy tunnel invert and the propagation law of initial cracks under dynamic load. Results show that the invert and its filling are the primary carriers of the dynamic load, and initial cracks exhibit swivel propagation under dynamic load.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Mechanical
Chenhui Zhang, Diankai Cao, Weijie You, Dong Wei, Chong Wu, Guotao Yang
Summary: This study investigated the structural behavior of the Taizhou Yangtze River Bridge, focusing on the vulnerability of the mid-pylon to fatigue failure. Fatigue strength tests on critical details of the steel mid-pylon revealed the need for strengthening measures to prevent crack propagation.
ENGINEERING FAILURE ANALYSIS
(2021)
Review
Engineering, Mechanical
Nan Hou, Ning Ding, Shen Qu, Weimin Guo, Long Liu, Na Xu, Linan Tian, Huixia Xu, Xiangfeng Chen, Fahmi Zairi, Chi-Man Lawrence Wu
Summary: Shafts are critical components in equipment, playing a key role in supporting and transmitting motion. Failure analysis is important for safe operation and accident prevention. This review examines failure analysis cases for shafts in the past 20 years, summarizing common failure modes such as fracture and wear, and detailing the characteristics and causes of fatigue failure.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Bowen Chen, Shigeru Hamada, Takanori Kato, Taizo Makino, Hiroshi Noguchi
Summary: This study conducted fatigue tests with an inclined notch to predict the fatigue limit of a mechanically long crack under mixed modes based on fracture mechanics. It was found that the damage accumulation (DA) mode of fatigue crack propagation occurred from the crack tip, caused by the formation and coalescence of micro-voids. Therefore, the method of modifying the initial crack length considering the DA mode crack propagation length showed potential application in fatigue limit prediction. Additionally, a classification method of DA and normal modes was proposed.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Metallurgy & Metallurgical Engineering
Shazia Muzaffer, Kyong-Ho Chang, Zhen-Ming Wang, Seong-Uk Kang
Summary: In offshore structures, fatigue cracks in the jacket structure are caused by repeated wave pressure and wind loads, usually occurring at welded intersections. To improve fatigue life, it is crucial to identify the initial fatigue crack location, which can be prevented by using stiffeners. Through analysis and verification, it was quantitatively revealed that stiffeners are effective in preventing fatigue cracking, improving fatigue life, and decreasing stress concentration.
WELDING IN THE WORLD
(2022)
Article
Engineering, Mechanical
Rou Li, Hao Wang, Changqing Miao
Summary: This paper investigates the effects of corrosion on the fatigue life and failure mechanism of steel wires, and proposes a numerical analysis method considering the corroded surface to evaluate the residual fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Ying Chen, Shuangjian Zhan, Haojun Yu, Fan Wang
Summary: In order to prevent similar accidents, an investigation analysis was conducted on the failure of a second-stage rotor blade of a TRT, including macro-fractural analysis, metallographic structural analysis, chemical composition analysis, and metal inclusion detection. Then, a series of CFD and FEA simulations were carried out under typical operating conditions, followed by crack propagation life analysis, where the causes of component failure were closely examined. The results indicate that the blade failure is due to a typical fatigue fracture with multiple crack sources, and the crack propagation is caused by the extrusion collision between the blade and its matching dovetail groove of the rotating shaft.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Monika Duda, Dariusz Rozumek, Michal Smolnicki, Anna Wybraniec
Summary: The article discusses the results of a study on fatigue fracture in mixed and I + II and I + III modes in heat treated steel 42CrMo4. It presents different mechanical properties resulting from various thermal treatments and demonstrates tests conducted on different sample types and load angles. The research aims to enhance understanding of fatigue crack development under mixed modes and provide valuable insights into the material's behavior under complex loads.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Review
Engineering, Mechanical
Funing Xu, Ning Ding, Nan Li, Long Liu, Nan Hou, Na Xu, Weimin Guo, Linan Tian, Huixia Xu, Chi-Man Lawrence Wu, Xiaofeng Wu, Xiangfeng Chen
Summary: This work reviews the failure modes, mechanisms and causes of bearings in mechanical equipment. It analyzes failure modes such as fracture, corrosion, deformation and wear, and summarizes the research progress in bearing failure analysis over the past 20 years. It discusses the classification of failure modes and presents typical case studies. The study finds that wear and fatigue are the most common failure modes of bearings, and incorrect assembly, use, and maintenance are the main causes. The aim of this review is to provide systematic information for bearing failure analysis and improve the reliability of bearings.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Civil
Cheng Xiang, Dalei Wang, Benjin Wang, Airong Chen, Rujin Ma
Summary: In this paper, a numerical simulation method based on linear elastic fracture mechanics (LEFM) was established to simulate the fatigue crack propagation behavior on orthotropic steel deck (OSD) and predict the fatigue crack life. By analyzing factors that may influence crack propagation behavior, a practical approach was proposed to estimate the fatigue life.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2022)
Article
Chemistry, Physical
Frank H. G. Stolze, Keith Worden, Graeme Manson, Wieslaw J. Staszewski
Summary: The use of a diffused Lamb wave field is a challenging yet effective method for fatigue-crack detection in multi-riveted strap-joint aircraft panels. The panel is equipped with low-profile surface-bonded piezoceramic transducers, which extract information on fatigue damage through various amplitude characteristics of Lamb waves. Statistical outlier analysis is performed to detect damage, and simplified wave scattering modeling is used to explain complex response features. The results demonstrate the potential and limitations of this method for reliable fatigue-crack detection in complex aircraft components.
Article
Engineering, Civil
Renbing An, Jiacong Yuan, Yi Pan, Duhang Yi
Summary: Traditional timber structures built on sloped land are more susceptible to seismic damage compared to structures built on flat land. The upper portion of the structure is found to be the weak point on sloped land, with potential issues such as tenon failure and column foot sliding.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Elyas Bayat, Federica Tubino
Summary: The current design guidelines for assessing floor vibration performance do not consider the influence of variability in the walking path on the dynamic response of floors. This study investigates the dynamic response of floors under a single pedestrian walking load, taking into account the randomness of the walking path and load. The effectiveness of the current guidelines in predicting floor response is critically assessed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Gao Ma, Chunxu Hou, Hyeon-Jong Hwang, Linghui Chen, Zhenhao Zhang
Summary: Minimizing earthquake damage and improving repair efficiency are the main principles of resilient structures. This study proposed a repairable column with UHPC segments and replaceable energy dissipaters. The test results showed that the columns with UHPC segments and replaceable dissipaters exhibited high strength, deformation capacity, and energy dissipation.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Kartheek S. M. Sonti, Pavan Kumar Penumakala, Suresh Kumar Reddy Narala, S. Vincent
Summary: In this study, the compressive behavior of alumina hollow particles reinforced aluminum matrix syntactic foams (AMSF) was investigated using analytical, numerical, and experimental methods. The results showed that the FE solver ABAQUS could accurately predict the elastic and elastio-plastic behavior of AMSFs. The study also suggested that FE models have great potential in developing new materials and composites under compression loading.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Zheqi Peng, Xin Wang, Zhishen Wu
Summary: In this study, the statistical modeling of fiber-reinforced polymer (FRP) cables using the classic fiber bundle model is explored. The study considers important features of large-scale multi-tendon FRP cables, such as initial random slack and uneven tensile deformation among tendons. A parametric study and reliability analysis are conducted to predict the load-displacement relation and design thousand-meter-scale FRP cables. The study emphasizes the relation between the reliability index beta of the cable and the safety factor gamma of the FRP material.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Yanchao Shi, Shaozeng Liu, Ye Hu, Zhong-Xian Li, Yang Ding
Summary: This paper introduces a damage assessment method for reinforced concrete (RC) columns under blast loading, using modal parameter measurement as the evaluation index. The validity of the proposed method is validated through numerical and experimental analysis. The results show that this modal-based damage assessment method is applicable for non-destructive evaluation of blast-induced damage of RC columns.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Xiaolin Zou, Maosheng Gong, Zhanxuan Zuo, Qifang Liu
Summary: This paper proposes an efficient framework for assessing the collapse capacity of structures in earthquake engineering. The framework is based on an accurate equivalent single-degree-of-freedom (ESDOF) system, calibrated by a meta-heuristic optimization method. The proposed framework has been validated through case studies, confirming its accuracy and efficiency.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jie Hu, Weiping Wen, Chenyu Zhang, Changhai Zhai, Shunshun Pei, Zhenghui Wang
Summary: A deep learning-based rapid peak seismic response prediction model is proposed for the most common two-story and three-span subway stations. The model predicts the peak seismic responses of subway stations using a data-driven approach and limited information, achieving good predictive performance and generalization ability, and demonstrating significantly higher computational efficiency compared to numerical simulation methods.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jin Ho Lee, Jeong-Rae Cho
Summary: A simplified model is proposed to estimate the earthquake responses of a rectangular liquid storage tank considering the fluid-structure interactions. The complex three-dimensional structural behavior of the tank is represented by a combination of fundamental modes of a rectangular-ring-shaped frame structure and a cantilever beam. The system's governing equation is derived, and earthquake responses such as deflection, hydrodynamic pressure, base shear, and overturning moment are obtained from the solution.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
W. J. Lewis, J. M. Russell, T. Q. Li
Summary: The work discusses the key features and advantages of optimal 2-pin arches shaped by statistically prevalent load and constant axial stress. It extends the design space of symmetric arches to cover asymmetric forms and provides minimum values of constant stress for form-finding of such arches made of different materials. The analysis shows that constant stress arches exhibit minimal stress response and have potential implications for sustainability and durability of future infrastructure.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Wen-ming Zhang, Han-xu Zou, Jia-qi Chang, Tian-cheng Liu
Summary: Saddle position is crucial in the construction and control of suspension bridges. This study proposes an analytical approach to estimate the saddle positions in the completed bridge state and discusses the calculation under different definitions. The relationship between the saddle position and the tower's centerline is analyzed, along with the eccentric compression of the tower. The feasibility of the proposed method is verified through a real-life suspension bridge.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Shaise K. John, Alessio Cascardi, Yashida Nadir
Summary: This study experimentally investigated the use of TRM material for reinforcing concrete columns. The results showed that increasing the number of textile layers effectively increased the axial strength. Additionally, the choice of fiber type and hybrid textile configuration also had a significant impact on strength improvement. A new design model that considers the effects of both the confining matrix and textile was proposed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chandrashekhar Lakavath, S. Suriya Prakash
Summary: This study experimentally investigated the shear behavior of post-tensioned UHPFRC girders, considering factors such as prestress level, fiber volume fraction, and types of steel fibers. The results showed that increasing prestress and fiber dosage could enhance the ultimate load-carrying capacity of the girders, reduce crack angle, and increase shear cracking load.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Vahid Goodarzimehr, Siamak Talatahari, Saeed Shojaee, Amir H. Gandomi
Summary: In this paper, an Improved Marine Predators Algorithm (IMPA) is proposed for size and shape optimization of truss structures subject to natural frequency constraints. The results indicate that IMPA performs better in solving these nonlinear structural optimization problems compared to other state-of-the-art algorithms.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chun-Xu Qu, Jin-Zhao Jiang, Ting-Hua Yi, Hong-Nan Li
Summary: In this paper, a computer vision-based method is proposed to monitor the deformation and displacement of building structures by obtaining 3D coordinates of surface feature points. The method can acquire a large number of 3D coordinates in a noncontact form, improve the flexibility and density of measurement point layout, and is simple and cost-effective to operate.
ENGINEERING STRUCTURES
(2024)