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  • Open Access

    ABSTRACT

    Research on Artificial Intelligence Method for Identification of Transformer Fault

    Ryuji Shioya and Hongjie Zheng

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 195-195, 2019, DOI:10.32604/icces.2019.05008

    Abstract Oil-filled power transformers play an important role in the modern network system. Stability of power supply can be achieved by early detection of power transformer fault and continuous monitoring of equipment status. Transformers in operation are constantly affected by various types of stresses such as electrical, thermal and mechanical stress. Much attention is needed on maintenance of transformers in order to have fault free electric supply and to maximize the lifetime of a transformer. In recent years, Dissolved gas analysis (DGA) has been widely used for diagnostic fault of power transformers. Although DGA is an… More >

  • Open Access

    ABSTRACT

    Raindrops and Turbulence in a Cloud

    Rama Govindarajan1, S. Ravichandran2, Jason Picardo1, Samriddhi Sankar Ray1, S. Ganga Prasath1, Vishal Vasan1

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 194-194, 2019, DOI:10.32604/icces.2019.05206

    Abstract A cloud is in turbulent motion. It contains water vapour, aerosol particles and liquid water droplets. Depending on local levels of supersaturation, condensation takes place onto the aerosol particles and tiny droplets are formed. Our studies are aimed at understanding how these droplets grow in a short time, thought to be of the order of ten minutes, from about a micron in size into raindrops, which are of the order of millimeters. An important part of the process is collisions between droplets, some of which results in coalescence. Caustics from a single vortex are shown… More >

  • Open Access

    ABSTRACT

    Applications of Computational Mechanics on Advanced Film-Type Nano/Micro Structures

    Chang-Chun Lee

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 193-193, 2019, DOI:10.32604/icces.2019.05407

    Abstract Over the past half-century, the pivotal concepts and theories of solid mechanics was maturely developed to describe the mechanical responses of meso-scaled structure. From the viewpoint of traditional solid mechanics, the major concerns of developed analytic solutions were to investigate the mechanical responses of bulk-scaled material. However, the abundance of novel nano/micro process and corresponding material structures with unique mechanical behavior revealed that the limitation of traditional solid mechanics. For this reason, this research is mainly devoted to review the application of computational mechanics on nano/micro structures. As a result of this review paper, application… More >

  • Open Access

    ABSTRACT

    Mathematical Foundation of the Collocation Boundary Element Method: Consistent Formulation, Convergence Theorem and Accurate Numerical Quadrature

    Ney Augusto Dumont

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 192-192, 2019, DOI:10.32604/icces.2019.05284

    Abstract The use of boundary integral equations as an attempt to solve general problems of elasticity and potential has largely preceded the use of domain-related developments, which only became feasible (and conceivable) with the advent of powerful computational devices. On the other hand, the present-day matrix, computational-ready outline of the boundary element method (including its nowadays prevalent name) has borrowed – in part correctly and in part wrongly – much from the finite element concepts and formulation. We propose a revisit of the method, including, as for elasticity problems: a) conceptual reformulation in terms of weighted… More >

  • Open Access

    ABSTRACT

    The Progress of Energy Meshless Methods by Using Trial Functions as the Bases of Solution

    Cheinshan Liu1,2,3, Chunglun Kuo2

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 189-191, 2019, DOI:10.32604/icces.2019.05074

    Abstract For the linear differential operator equation equipped with boundary conditions we derive an energy identity. Then we propose an energy regularization technique to choose the energetic bases in the numerical solution of linear differential operator equation. In many meshless methods with some trial functions as the bases of numerical solution, there exist certain parameters in the numerical method. We derive a very simple energy gap functional and minimize it to determine the optimal parameters. The new methodology upon adopting optimal parameters by minimizing the energy gap functional can improve the accuracy of the meshless methods More >

  • Open Access

    ABSTRACT

    Meshless Methods in Computational Biomechanics for Medicine

    Karol Miller

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 188-188, 2019, DOI:10.32604/icces.2019.06116

    Abstract The field of Biomechanics is in the most exiting state of transition from the theoretical subject of the 20th century to a practical discipline providing patient-specific solutions in the 21st century. Computational biomechanics is becoming instrumental in enabling a new era of personalized medicine based on patient-specific scientific computations. The Finite Element Method is used by almost all members of computational biomechanics community to analyze mathematical models described by sets of partial differential equations. FEM, however, has a number of fairly serious theoretical and practical deficiencies when applied to highly deformable objects of very complicated… More >

  • Open Access

    ABSTRACT

    A Simple Method for Simulation of Crack Growth in Welded Structures

    Hidekazu Murakawa

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 187-187, 2019, DOI:10.32604/icces.2019.05179

    Abstract It is known that fatigue life of welded structures, such as ships and bridges, is greatly influenced by welding residual stress. In case of real structures, the orientation of the stresses produced by dead load and that produced by applied load and that of welding residual stress are generally different from each other and they form a highly complex multiaxial stress states. On the other hand, the fatigue behavior has been mostly studied for uniaxial stress state without residual stress. The crack growth rate is related to the Range of stress intensity factor ΔK such as… More >

  • Open Access

    ABSTRACT

    Three-Dimensional Fracture Mechanics: Bridge the Gap from Laboratory to Engineering Structures

    Wanlin Guo

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 184-186, 2019, DOI:10.32604/icces.2019.04905

    Abstract The fracture mechanics theories have been developed actively for several decades, and have been successful for many specific engineering applications and serves as the fundamental for damage tolerant design of structures. In 1957, William and Irwin obtained the stress intensity factor K dominated solution of the singular stress and strain fields near crack tip in linear elastic plate, provided the theoretical basis for linear elastic fracture mechanics. In 1968, the famous J-integral dominated HRR solution for plane stress and plane strain cracked plates of power law hardening materials has long served as the fundamental of elastic-plastic… More >

  • Open Access

    ABSTRACT

    Damage Modeling of Heterogeneous Materials Using Multiscale Approach

    Jurica Sorić*, Tomislav Lesičar, Filip Putar, Zdenko Tonković

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 181-183, 2019, DOI:10.32604/icces.2019.04554

    Abstract The paper deals with the novel multiscale approaches for modelling of both quasi-brittle and ductile damage responses of heterogeneous materials. The damage is induced at the microstructural level and, after the homogenization procedure, it is included in the constitutive stiffness of the material point at macrolevel. The derived algorithms are implemented into the finite element software ABAQUS. The new two-scale transition procedures have been verified on the standard benchmark examples. More >

  • Open Access

    ABSTRACT

    Computational Modelling of Thermoelectricity, Carrier Mobility and Electro-Catalytic Oxygen Reduction Reaction: a Few Examples

    Swapan K Pati

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 180-180, 2019, DOI:10.32604/icces.2019.05545

    Abstract In recent years, many van der Waals solids, perovskites, spinels etc. exhibit many fold benefits for applications in a number of fields, namely, transparent substrates, field effect transistors, solar cells, thermoelectric materials, active surface for catalysis, rechargeable battery etc, to name a few. In fact, recent experimental advancements on the control over the surface structure of materials has enabled material scientists to tailor the material properties with improved reliability and functionality. We have derived relaxation time formulation from complete Boltzmann transport equation and obtained all the parameters from ab-initio density functional theory. Using this formalism,… More >

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