WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7150

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  • Article
    Citation - WoS: 1
    Citation - Scopus: 1
    Reliability Assessment of Structures With Bayesian Model Updating Accelerated Via Polynomial-Chaos Metamodeling
    (Taylor & Francis Ltd, 2025) Uzun, Ertugrul Turker; Hizal, Caglayan; Aktas, Engin
    Finite element models are often preferred in numerical modeling of structures, but model assumptions lead to inaccuracies and uncertainties. Measuring these is necessary to determine the reliability and accuracy of the numerical model. This has led to the development of FE model update methods that aim to calibrate the numerical model based on data obtained by structural health monitoring (SHM). However, a general framework that provides a realistic life cycle performance assessment of structures by efficiently incorporating monitored data into structural identification has not yet been impeccably presented. Bayesian modeling can characterize uncertain structural parameters as random variables and provide a systematic methodology for integrating a probabilistic SHM framework into model updating. Unfortunately, these lead to complex and time-consuming, causing limitations in their application. Metamodeling techniques which are effective stochastic predictors can be used to decrease the computational burden in the model updating. This study aims at adapting Polynomial-Chaos-Kriging metamodeling technique integrate to Bayesian model updating process to overcome the computational difficulties and reduce different source of uncertainty with using SHM, then, make more accurate reliability assessment. Therefore, an experimental study is used to assess reliability of structure that is exposed to different types of corrosion effects.
  • Review
    Citation - WoS: 14
    Citation - Scopus: 16
    Advancing Titanium-Based Surfaces Via Micro-Arc Oxidation With Solid Substance Incorporation: a Systematic Review
    (Elsevier, 2024) Ogur, Ezgi; Alves, Alexandra C.; Toptan, Fatih
    Despite possessing numerous superior properties, titanium, and its alloys exhibit inadequacies in terms of tribocorrosion, bioactivity, and antimicrobial characteristics. In recent years, there has been a rapid increase in research focusing on micro-arc oxidation (MAO) surface treatments to enhance these properties. In the traditional MAO approach, researchers commonly investigate the introduction of additional functionalities to the surface through ion doping. However, over the past decade, studies have indicated that the inclusion of solid substances, either as substitutes for or in conjunction with ion doping, can provide further advantages in terms of multifunctionality. Therefore, this review comprehensively and systematically examines the characteristics of solid substances used during MAO, their incorporation mechanisms, and their influence on resulting biological and degradation behaviors, as well as properties such as photocatalytic activity, magnetic features, hightemperature oxidation resistance, electrical insulation, and thermal shock resistance. This review showed that the integration of solid substances during MAO represents a promising avenue for achieving multifunctional surface enhancements in titanium and its alloys. This review highlights the diverse range of properties and behaviors influenced by these solid substances, offering insights for future research and applications in the field of surface engineering and biomaterials science.
  • Article
    Citation - WoS: 8
    Citation - Scopus: 10
    Impact of Simulated Inflammation and Food Breakdown on the Synergistic Interaction Between Corrosion and Wear on Titanium
    (Elsevier Ltd, 2024) Lima,A.R.; Pinto,A.M.P.; Toptan,F.; Alves,A.C.
    This paper investigates the impact of lactic acid and phosphoric acid additives in artificial saliva (AS), simulating inflammation and food breakdown, on the electrochemical and tribo-electrochemical behavior of titanium. The results showed that, unlike lactic acid, phosphoric acid significantly reduced corrosion resistance, mainly due to local damage and heterogeneities on the passive film. Non-additivated AS caused greater wear volume loss, with mechanical wear identified as the main mechanism. However, when additives were present, a synergistic interplay between corrosion and wear was observed. The study concludes that prolonged exposure to food breakdown could accelerate material degradation in titanium. © 2024 Elsevier Ltd