Article
Engineering, Industrial
Mingze Liu, Baoguang Sang, Chunlei Hao, Guoxin Chen, Jin Yan
Summary: Thermal fatigue cracking is a common failure mechanism of die casting dies. In this paper, a thermal fatigue test method based on cyclic induction heating was proposed to evaluate the thermal cracking of actual die casting die steel. The mechanism of thermal fatigue crack initiation and propagation was studied, and the thermal fatigue life of different die steels was compared and analyzed. A new fatigue life prediction method was proposed to improve the thermal fatigue life of hot work die steels.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Vivek Richards Pakkam Gabriel, Mohamed Sahbi Loukil, Janis Varna
Summary: This paper suggests a methodology for cracking evolution simulation during cyclic loading in 90-plies, using data from different load levels and Monte Carlo process to predict crack development. The results indicate that cyclic test data can be used to predict damage at different load levels, and recommend conducting fatigue tests at least at two load levels for reliable predictions.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Civil
Xu Han, Dan M. Frangopol
Summary: Fatigue cracking is a common issue for steel bridges. Structural health monitoring techniques can provide reliable information on stress states at fatigue-prone details. However, when considering corrosion, relying solely on monitoring information may not be enough to accurately estimate the impact of corrosion on fatigue damage.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Industrial
Adel Gassab, Rabi Ben Sghaier, Raouf Fathallah
Summary: This manuscript presents a probabilistic approach for predicting the reliability of high cycle fatigue behavior in shape memory alloy (SMA) parts. The proposed method takes into account the material parameters and applied loading path dispersions. It uses Monte Carlo Simulation techniques and strength-load methods combined with probability box concepts to compute fatigue reliability. The approach leads to more accurate predictions compared to deterministic methods and is in good agreement with experimental fatigue failure results.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Mathematics, Applied
M. Ganesh, B. Reyes
Summary: The paper investigates a class of physical processes modeled by the Allen-Cahn (A-C) partial differential equation (PDE) evolutionary system with uncertainties in the initial state and the A-C PDE. A hybrid computational model is developed to efficiently compute statistical moments of the numerical counterparts of the A-C stochastic processes by using finite element method, high-order digital nets sampling, and interplay of discretization parameters. The hybrid framework demonstrates marked efficiency compared to standard methods in handling two- and three-dimensional space, and high stochastic dimensional A-C examples.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2022)
Article
Materials Science, Multidisciplinary
Josep Forner-Escrig, Rosa Mondragon, Leonor Hernandez, Roberto Palma
Summary: Nanoencapsulated phase change materials (nePCMs) are being researched for energy storage, with the study finding that the melting temperature and thermal expansion of the core significantly affect the maximum stress. Utilizing Monte Carlo techniques and finite element modeling, uncertainty and sensitivity analyses were conducted, revealing that only a small percentage of tin nePCMs are expected to experience mechanical failures.
MECHANICS OF MATERIALS
(2021)
Article
Polymer Science
Jian Wu, Long Chen, Da Chen, Youshan Wang, Benlong Su, Zhibo Cui
Summary: The wear performance of aircraft tires is directly influenced by the road surface and tread pattern structures, especially under lateral sliding conditions, with draft angle having a greater impact than root radius. Wear tests and simulations showed that increasing slip angle led to material loss, predominantly fatigue wear and abrasive wear on the slide surface. The coefficient of friction decreased with increased load on dry cement concrete pavement interfaces, but decreased more gradually on wet interfaces.
Article
Energy & Fuels
Josep Forner-Escrig, Nuria Navarrete, Roberto Palma, Damiano La Zara, Aristeidis Goulas, David Valdesueiro, J. Ruud van Ommen, Leonor Hernandez, Rosa Mondragon
Summary: Nanoencapsulated phase-change materials (nePCMs) were investigated to enhance thermal energy storage. SiO2 and Al2O3 coatings on Sn nanoparticles were synthesized to overcome the failure problem of the nanocapsule shells. Probabilistic numerical tools and thermomechanical finite-element model were used to study the influence of shell thickness and composition on the probability of failure (POF) and melting enthalpy loss in nePCMs. The results showed that multicoated nePCMs had better thermomechanical performance than single-coated nePCMs, with lower POF and melting enthalpy loss with increased shell thickness.
Article
Engineering, Civil
Xiaoqing Xu, Xuhong Zhou, Yuqing Liu
Summary: This study focused on the application of rubber-sleeved studs in the design of steel-concrete composite structures. A method for predicting fatigue life and formulas for shear connectors were proposed, with reliability verified through comparison with design codes and test results.
ENGINEERING STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Ming Li, Yuan Luo, Liyang Xie
Summary: This paper focuses on the reliability of large aviation planetary systems, establishes a system fatigue reliability evaluation model using advanced technology, providing structural optimization guidance in development and design processes, and reducing costs.
Article
Engineering, Mechanical
Hugo Lannay, Siegfried Fouvry, Bruno Berthel, Camille Gandiolle, Jan Neggers, Gabriel Paramucchio
Summary: In order to predict the lifetime of metal pieces under fretting-fatigue loading, it is necessary to understand the crack initiation process. However, there is no consensus in the literature regarding the crack nucleation length. This study aims to establish a link between fretting crack nucleation and microstructure to resolve the question of critical crack nucleation size. Cylinder/plane fretting tests were conducted to analyze the evolution of crack length with respect to tangential load amplitude. The investigation suggests that the critical distance evolution depends on the considered defect size.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Construction & Building Technology
Ayat Al Assi, Husam Sadek, Carol Massarra, Mohammed Sadeq, Carol J. Friedland
Summary: The study focuses on developing a user-friendly analysis tool that determines the Nf following the VECD approach with incorporating probabilistic analysis. By defining the proper distribution function for each RV in the VECD-Nf model, developing a simple analysis tool using MATLAB App Designer, and reanalyzing previous studies data for HMA and FWMA mixtures, the P-VECD analysis tool allows for deterministic VECD analysis, probabilistic VECD analysis, and prediction of fatigue life of asphalt mixtures for technicians and engineers in the asphalt community.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Computer Science, Artificial Intelligence
Chikezie Chimere Onyekwena, Qi Li, Happiness Ijeoma Umeobi, Xiaying Li, John N. Ng'ombe
Summary: The soil water retention curve is a fundamental concept in unsaturated soil mechanics. Existing prediction models require large datasets, but obtaining such datasets can be costly and time-consuming. To address this issue, a reliability-based approach using a Bayesian framework and Hamiltonian Monte Carlo method is proposed. The method is robust and provides reliable predictions even with limited prior knowledge, while significantly reducing computation time and cost.
EXPERT SYSTEMS WITH APPLICATIONS
(2022)
Article
Construction & Building Technology
Zhiqun Zheng, Xinglin Miao, Xianzhen Huang, Pengfei Ding
Summary: This paper proposes a method for analyzing the fastening reliability of bolted joints considering the uncertainty of preload, friction coefficients, and material properties. The self-loosening behavior of a bolted joint under elastic conditions is studied using the finite element method (FEM), and a metamodel is constructed for improved computational efficiency. The fastening reliability is calculated using the Monte Carlo simulation (MCS) method, and the efficiency of the proposed method is evaluated through practical application and detailed analysis.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Engineering, Mechanical
Xiangnan Liu, Wen-Bin Shangguan, Xuezhi Zhao
Summary: A novel method for determining the probabilistic distribution model of natural rubber fatigue life is proposed in this study. Uniaxial tension fatigue tests are conducted on cylindrical specimens, and a support vector machine (SVM) model is used to expand the fatigue life data. The analysis shows that the fatigue life of natural rubber follows a lognormal distribution.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
