Open Access
ABSTRACT
Wei Huang1,*, Zhi Zhou2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 68-68, 2019, DOI:10.32604/icces.2019.05066
Abstract Structural members of different materials in hybrid structures have different damage performances. Based on the classical Park-Ang damage model, a consistent modification of that model is proposed for structural members of different materials in order to determine the behavior and the damage process from member-level to structure-level. Furthermore, the specific limit values of this damage model at various performance levels are calculated. Obvious differences have been found between the limit values of different types of members. In order to unify the damage limits that correspond to predefined performance levels such that a comparison between different members can be made directly,… More >
Open Access
ABSTRACT
Vaughan R. Voller
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 69-69, 2019, DOI:10.32604/icces.2019.05082
Abstract There has been current interest in studying diffusion processes that involve memory and non-locality. These phenomena can be modeled using fractional calculus tools. A fractional derivative in time, a convolution of previous states of the system, modeling memory and a fractional derivative in space, a convolution over aspace domain, modeling non-locality. In this work we consider how such treatments can be incorporated into models of phase change systems. In particular, we examine the consequences of replacing the time and space derivative in the classic one-phase Stefan melting problem with appropriate fractional derivatives. A number of alternative formations and associated computational… More >
Open Access
ABSTRACT
Igor Vušanović1,*, Vaughan R Voller2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 70-70, 2019, DOI:10.32604/icces.2019.05185
Abstract In the modeling of liquid to solid phase change processes the movement of the solid phase (e.g., the grains that form when solidifying an alloy) can have a significant impact on the timing and pattern of the process. While a number of solidification models account for the movement of the solid phase, additional analysis is needed to fully understand the phenomena and guide in the selection of appropriate numerical technologies for its resolution. Towards this end, here, we introduce a reduced complexity model (RCM) to describe the solidification of an initially liquid binary material flowing between two parallel cooled plates… More >
Open Access
ABSTRACT
Shigeru Obayashi*, Aiko Yakeno
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 71-71, 2019, DOI:10.32604/icces.2019.05229
Abstract In our laboratory, we have been conducting research focusing on a data-driven approach to fluid engineering for design. Designing aerospace machines, these days requires more advanced factors. The recent development of supercomputer leads that we must treat more complex flow phenomena that brings uncertainty, with the more advanced design considered. Such as a reduced-order model and a data assimilation method, to estimate and reduce the uncertainty in numerical simulations, are potential ways to assist the advanced design. That is by use of experimental or observational data and numerical analysis of physical equations. Recently, we are focusing on observation sensitivity, in… More >
Open Access
ABSTRACT
Zhigang Zhu1,*, Wenxiang Xu1
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 72-72, 2019, DOI:10.32604/icces.2019.04957
Abstract The volume fraction of interphase is an important microstructure parameter in the prediction of macroscopic properties of particulate composites. Currently, some researchers have presented theoretical and numerical investigations on the interphase fraction for spherical particle systems, and even quantify the influence of interphase fraction on the overall elastic and transport properties of particulate composites. However, the overlapping interphase fraction in polydisperse non-spherical particle systems is still an open issue. In this study, a generic theoretical model is formulated to derive the overlapping interphase fraction for polydisperse 2D non-circular and 3D non-spherical particle systems by means of the statistical geometry of… More >
Open Access
ABSTRACT
Taku Nonomura
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 73-74, 2019, DOI:10.32604/icces.2019.05266
Abstract In this presentation, a family of Kalman filter dynamic mode decomposition, which consists of algorithms of the linear Kalman filter DMD method which identify the linear system and the extended Kalman filter DMD method which simultaneously identify the system and estimates state variable, is introduced. Then, the application of the extended Kalman filter DMD to data assimilation is discussed. More >
Open Access
ABSTRACT
Junbo Wang*, Leiting Dong
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 75-75, 2019, DOI:10.32604/icces.2019.04820
Abstract In this study, two/three-dimensional computational grains are developed for micromechanical modeling of heterogeneous materials with nanoscale inhomogeneities, considering the interface stress effect. Two types of computational grains are developed, depending on the types of inhomogeneity in each element. Each computational grain can include alternatively a spherical void or a spherical elastic inclusion. In these computational grains, an inter-element compatible displacement field is assumed along the element outer-boundary, and interior displacement fields in the matrix as well as in the inclusion are independently assumed as T-Trefftz trial functions. For planar problems, complex potentials are used to derive the Trefftz trial displacement… More >
Open Access
ABSTRACT
Tian Yang1, Leiting Dong1,*, Satya N. Atluri2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 76-76, 2019, DOI:10.32604/icces.2019.05078
Abstract In this paper, a new method, named the Fragile Points Method (FPM), is developed for computer modeling in engineering and sciences. In the FPM, simple, local, polynomial, discontinuous and Point-based trial and test functions are proposed based on randomly scattered points in the problem domain. The local discontinuous polynomial trial and test functions are postulated by using the Generalized Finite Difference method. These functions are only piece-wise continuous over the global domain. By implementing the Point-based trial and test functions into the Galerkin weak form, we define the concept of Point Stiffnesses as the contribution of each Point in the… More >
Open Access
ABSTRACT
Xianglong Su*, Wenxiang Xu, Wen Chen
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 77-77, 2019, DOI:10.32604/icces.2019.05090
Abstract Creep of concrete can last for decades, which displays the ultra-slow rheological phenomena. As an empirical formula, the logarithmic law is usually used to describe the ultra-slow creep. However, the logarithmic law does not always work well especially for the long-term creep. And its corresponding relaxation response cannot be obtained analytically. It is known that the Mittag-Leffler and the inverse Mittag-Leffler functions are generalized from the exponential and the logarithmic functions, respectively. And the inverse Mittag-Leffler function is much slower and generalized than the logarithmic function. In this paper, we use the non-local structural derivative to establish a new Maxwell-type… More >
Open Access
ABSTRACT
Jintao He, Dong Lei*, Xuwei Cui, Pengxiang Bai, Feipeng Zhu
The International Conference on Computational & Experimental Engineering and Sciences, Vol.21, No.4, pp. 78-78, 2019, DOI:10.32604/icces.2019.05228
Abstract With the combination of scanning electron microscope (SEM) and digital image correlation (DIC), the mechanical properties of interfacial transition zone (ITZ) in concrete are experimentally studied. The experimental compression tests are performed on cuboid samples whose half part is aggregate and the other part is mortar. The morphology of the ITZ is captured by SEM under compressive load, and from the recorded images the deformation of the ITZ is analyzed. After that, the distribution of the nominal compressive elastic modulus of the ITZ is obtained along the distance from the aggregate to the mortar, which can be used to characterize… More >
Login
Register
Submit a Paper
Propose a Special lssue