Journal of Multiscale Modelling最新文献

{"title":"Finite Block Method with Chebyshev Polynomials Applied to Cracked Plate in Functional Graded Materials","authors":"X. Li, M. Aliabadi, J. Sládek, V. Sládek, P. Wen","doi":"10.1142/s1756973723410020","DOIUrl":"https://doi.org/10.1142/s1756973723410020","url":null,"abstract":"","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42110144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Statistical Inference of Equivalent Initial Flaw Size Distribution for Fatigue analysis of an Anisotropic Material","authors":"M. Zhuang, L. Morse, Z. S. Khodaei, M. H. Aliabadi","doi":"10.1142/s1756973723410032","DOIUrl":"https://doi.org/10.1142/s1756973723410032","url":null,"abstract":". A novel methodology for the fatigue life uncertainty quantification of anisotropic structures is presented in this work. The concept of the Equivalent Initial Flaw Size Distribution (EIFSD) is employed to overcome the difficulties in small cracks detection and fatigue prediction. This EIFSD concept is combined with the Dual Boundary Element Method (DBEM) to provide an efficient methodology for modelling the fatigue crack growth. Bayesian inference is used to infer the EIFSD based on inspection data from the routine maintenance of the structure, simulated with the DBEM. A large amount of DBEM simulations were required for the Bayesian inference. Therefore, surrogate models are used as part of the inference to further improve computational efficiency. A numerical example featuring an anisotropic plate is investigated for demonstrating the proposed methodology. When considering a low level of uncertainty in the crack propagation parameters, an error of 0.12% was found between the estimated fatigue life obtained using the proposed method compared to actual fatigue life, and only 0.35% error when considering high level of uncertainty. The application of the estimated fatigue life can be used to determine an appropriate inspection interval for aircraft maintenance.","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46166636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiscale Modeling and Simulation of Hydrodynamic Inclined Fixed Pad Thrust Slider Bearing","authors":"Chen Huang, Yongbin Zhang","doi":"10.1142/s1756973722500056","DOIUrl":"https://doi.org/10.1142/s1756973722500056","url":null,"abstract":"Numerical calculations were made for the multiscale hydrodynamic inclined fixed pad thrust slider bearing where the nanoscale non-continuum adsorbed layer flow and the intermediate continuum fluid flow simultaneously occur. They were compared with the results calculated from the analytically derived pressure formulas in the earlier study for the same bearing, which are essentially approximate. It was found that when the surface separation on the exit of the bearing is no less than 13[Formula: see text]nm, the analytically derived pressure formulas are valid for the studied multiscale hydrodynamic bearing for the weak, medium and strong fluid-bearing surface interactions; otherwise, the numerical approach is mandatory for calculating the hydrodynamic pressures in the bearing.","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44652133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Finite Element Simulation and Experiments of Laminated Cu Cladding Fe Sheet During Cold Rolling Bonding","authors":"Liang Dong, Xiong Sang, Wu Hao","doi":"10.1142/s1756973722500019","DOIUrl":"https://doi.org/10.1142/s1756973722500019","url":null,"abstract":"ABAQUS was used to simulate the laminated Cu cladding Fe sheet during cold rolling, combining theoretical calculations, and the orthogonal test method was adopted. Meanwhiles, the rolling stress was taken as a consideration index to investigate the cold rolling processing rate, rolling speed, friction factor (upper roller), and friction factor (lower roller) 4, the best process parameters of layered metal copper/steel cold-rolled composite are selected. The results show that the cold-rolling processing rate is 52%, the rolling speed is 75 m/min, and the roller friction factor is 0.2 is the best process parameter. At this time, the rolling stress is small, and the bonding quality is the best. Cu cladding Fe sheet of the above-mentioned production process was taken into annealing experiments, SEM and an energy spectrometer were applied to photograph the surface morphology and the element distribution. The interface thickness was calculated by the diffusion distance of Fe and Cu elements, and the interface morphology and mechanical properties were combined for judgment. The results show that the annealing temperature is [Formula: see text]C and the bonding condition is the best under the condition of 4[Formula: see text]h heat preservation.","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41328191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Analysis of Surface Rolling Effects on Fatigue Life Enhancement of Wire Arc Additively Manufactured Parts","authors":"Dingkun Pi, A. Ermakova, A. Mehmanparast","doi":"10.1142/s175697372146001x","DOIUrl":"https://doi.org/10.1142/s175697372146001x","url":null,"abstract":"With the advancements in additive manufacturing (AM) technologies, it is expected that fast and efficient production using the AM techniques will gradually replace the traditional manufacturing processes. An important consideration in the design and life assessment of AM-built parts is the asset integrity management and in particular fatigue life enhancement of such components. Surface rolling treatment is known to be an efficient way to introduce deep compressive residual stresses into engineering components, and therefore it has been considered as a practical and effective life enhancement technology. In this study, the surface rolling effects on the fatigue life enhancement of wire arc additively manufactured (WAAM) parts have been investigated. For this purpose, a compact tension specimen geometry was modeled in ABAQUS and the rolling process was simulated by means of finite element simulations to predict the extent of compressive residual stresses induced into a WAAM built part. The simulation results have been discussed in terms of the beneficial effects of surface rolling on fatigue life enhancement of WAAM built parts.","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46787714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Initial buckling and free vibration analysis of elastically supported laminated plates using meshless technique","authors":"C. Kumar, Arbind Kumar","doi":"10.1142/s1756973722500044","DOIUrl":"https://doi.org/10.1142/s1756973722500044","url":null,"abstract":"","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47746508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Memory Response on the Elasto-Thermodiffusive Interaction Subjected to Harmonically Varying Heat Source","authors":"D. Bhattacharya, P. Purkait, M. Kanoria","doi":"10.1142/s1756973722500020","DOIUrl":"https://doi.org/10.1142/s1756973722500020","url":null,"abstract":"","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43454877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2D Stress Analysis of an Infinite Plate with Orthotropic Inclusions by Embedding Continuous Force Doublet","authors":"T. Ino, Yohei Sonobe, Atsuhiro Koyama, A. Saimoto, Md. Abdul Hasib","doi":"10.1142/s1756973722500032","DOIUrl":"https://doi.org/10.1142/s1756973722500032","url":null,"abstract":"","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47169296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fracture of Honeycombs Produced by Additive Manufacturing","authors":"Chen Ling, J. Nguejio, Riccardo Manno, L. St-Pierre, F. Barbe, I. Benedetti","doi":"10.1142/s1756973721440066","DOIUrl":"https://doi.org/10.1142/s1756973721440066","url":null,"abstract":"Lattice materials, such as honeycombs, are remarkable in their ability to combine high stiffness, strength and toughness at low density. In addition, the recent and pervasive development of additive manufacturing technologies makes it easier to produce these cellular materials and opens new possibilities to improve their properties by implementing small modifications to their microstructure. Such developments open new opportunities towards the design of new classes of architectured materials. For example, recent computational studies have shown that honeycombs with lattice density gradients have a fracture energy under tensile loading up to 50% higher than their uniform counterparts. The aim of this study is to provide experimental evidence for these promising numerical results. To achieve this, single-edge notched tension specimens, with a honeycomb lattice structures, were manufactured by stereolithography using a ductile polymer resin. The performances of three different honeycombs were compared: (i) a uniform sparse lattice, (ii) a uniform dense lattice, and (iii) a gradient lattice with alternating bands of sparse and dense lattices. The results indicated that specimens with a density gradient may achieve a work of fracture per unit volume that is up to 79% higher than that of a uniform lattice.","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42594621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preface","authors":"L. Rodríguez-Tembleque, J. Sanz-Herrera, M. Aliabadi","doi":"10.1142/s1756973722020012","DOIUrl":"https://doi.org/10.1142/s1756973722020012","url":null,"abstract":"Proton Nuclear Magnetic Resonance (1H NMR) is a science to study the relationship between the energy level transitions of hydrogen nuclei in organic compounds under the action of magnetic field and the chemical environment in molecules. The NMR data of organic compounds mainly include the chemical shift (resonance frequency), the number of hydrogen atoms, the peak shape (peak splitting), and the coupling constant of hydrogen functional groups, which are closely related to the structure of organic compounds. In the process of conducting structural identification of organic compounds, we deeply feel that although we have understood the basic principle of nuclearmagnetic resonance phenomenonand the basic theory of chemical shift, peak integral area, spin coupling and spin splitting, coupling constant and so on, if there is no perceptual knowledge about nuclear magnetic resonance of various hydrogen functional groups in organic compounds, it is not enough to help us to analyze the structure of organic compounds skillfully. In addition, in the short 30 years from 1990s to now, with the theory and technology of NMR and computer science becomingmore and more mature, the research on the structure of organic compounds has tended to be micro, fast, and accurate, which greatly shortens the research period of natural organic compounds. On the basis of the development and wide application of separation and purification technology of natural organic compounds represented by conventional chromatography and preparative liquid chromatography, a large number of natural organic compounds with relatively complex structures have been identified, and the NMR signals of these compounds have been fully assigned, thus accumulating a large number of spectral data of natural organic compounds. These data are very important for researchers engaged in the research of organic chemistry (including natural organic chemistry), because they not only help to simplify the structural identification of known compounds obtained in organic chemistry research, but also can be used as an important reference in the structural identification of new similar compounds and even novel compounds. Natural organic chemistry is a basic subject to study the organic composition, structure, and change law of natural biological resources. It has been playing an important role in the research of organic chemistry, pharmaceutical chemistry, biochemistry, botany, and other disciplines, as well as the development of pharmaceutical industry and pesticide industry. For example, through the application of various natural organic compounds separation and purification methods and modern organic structure identification methods, tens of thousands of plant secondary metabolites have been identified in the field of phytochemistry, which not only greatly enriched the structure and types of organic compounds, but also proved that many components have significant physiological activities, or play an important role i","PeriodicalId":43242,"journal":{"name":"Journal of Multiscale Modelling","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42750678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}