Open Access
ABSTRACT
Jurica Sorić*, Boris Jalušić, Tomislav Lesičar, Filip Putar, Zdenko Tonković
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 1-1, 2021, DOI:10.32604/icces.2021.08043
Abstract In modeling of material deformation responses, the physical
phenomena such as stress singularity problems, strain localization and modeling
of size effects cannot be properly captured by means of classical continuum
mechanics. Therefore, various regularization techniques have been developed to
overcome these problems. In the case of gradient approach the implicit gradient
formulations are usually used when dealing with softening. Although the
structural responses are mesh objective, they suffer from spurious damage
growth. Therefore, a new formulation based on the strain gradient continuum
theory, which includes both strain gradients and their stress conjugates, has been
proposed. In this way, a physically… More >
Open Access
ABSTRACT
Ney Augusto Dumont
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 2-2, 2021, DOI:10.32604/icces.2021.08187
Abstract The mathematical modeling of microdevices, in which structure and
microstructure have approximately the same scale of magnitude, as well as of
macrostructures of markedly granular or crystal nature (microcomposites),
demands a nonlocal approach for strains and stresses. The present proposition is
based on a simplified strain gradient theory laid down by Aifantis, which has also
been applied mainly by Beskos and collaborators in the context of the boundary
element method. This paper is an extension of a presentation made during the
ICCES 2014 Conference in Crete, Greece, now relying on machine-precision
evaluation of all singular and hypersingular integrals required in… More >
Open Access
ABSTRACT
Jingfa Li1, Daobing Wang1, Bo Yu1,*, Shuyu Sun2, Dongliang Sun1
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 3-3, 2021, DOI:10.32604/icces.2021.08209
Abstract In natural gas engineering, the numerical simulation plays a significant role in the exploration, production and optimization of natural gas
reservoir. However, numerical simulations of compressible gas flow in porous media are always expensive due to the gas compressibility and nonlinear
properties. To save the computational cost, in this work we present a multigrid
coupled discrete empirical interpolation method (MG-DEIM) to speedup the simulation of compressible gas porous flow. In this MG-DEIM framework, the core idea is that the multigrid method based on the full approximate scheme
(FAS) is used to solve the flow equation (a pressure equation); for the… More >
Open Access
ABSTRACT
Ivano Benedetti1,*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 4-6, 2021, DOI:10.32604/icces.2021.08213
Abstract A recently developed novel three-dimensional (3D) computational
framework for the analysis of polycrystalline materials at the grain scale is
described in this lecture. The framework is based on the employment of: i) 3D
Laguerre-Voronoi tessellations for the representation of the micro-morphology
of polycrystalline materials; ii) boundary integral equations for the
representation of the mechanics of the individual grains; iii) suitable cohesive
traction-separation laws for the representation of the multi-physics behavior of
the interfaces (either inter-granular or trans-granular) within the aggregate, which
are the seat of damage initiation and evolution processes, up to complete decohesion and failure. The lecture will describe… More >
Open Access
ABSTRACT
Shichao Ma1, 2, Xin Ning1, 2, Pengbi Cui1, 2, Lili Ren1, 2, Liang Wang3
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 7-8, 2021, DOI:10.32604/icces.2021.08233
Abstract Vibration isolation design is essential for the spacecraft
capture operation in the on-orbit servicing missions. And contact impact is also inevitable in this process, which can be simplified as
piece-smooth ordinary differential equations and generate abundant
dynamics phenomena. Therefore, it is especially important to study
the contact dynamics responses. And global behavior research can
be visualized the characteristics of system. Aiming to this issue, the
global dynamics of a single-degree-of-freedom non-smooth
mechanical system in a vibration isolation experiment is studied by
using advanced numerical procedure in this paper. For this non- smooth impact and friction oscillator, the forcing frequency is… More >
Open Access
ABSTRACT
Koji Fukudome1,*, Takuya Wada1, Toma Takahashi1, Makoto Yamamoto1
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 9-9, 2021, DOI:10.32604/icces.2021.08298
Abstract Icing is a phenomenon that super-cooled droplets impinge and accrete
on a solid surface. When the icing occurs on aircraft wings, it deteriorates
aerodynamic performances of the wings and the blade cascades of the engine,
which may lead to severe accidents. Although number of investigations have
been performed both experimentally and numerically [1], the icing shape
prediction is now not practically complete due to the complex aspect of icing
phenomena. In the previous research, Toba et al. [2] employed an explicitmoving particles simulation method (referred as E-MPS method), which was
based on the Lagrangian approach, to reproduce the icing process… More >
Open Access
ABSTRACT
Miroslav Repka1,*, Jan Sladek1, Vladimir Sladek1
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 10-10, 2021, DOI:10.32604/icces.2021.08308
Abstract The flexoelectric effect is investigated in quantum dot (QD)
nano-sized structures. The lattice mismatch between QD and matrix
results in non-uniform strains and presence of the strain gradients in the
structure. The strain gradients induces the change of the polarization in
QD structure as a consequence of the flexoelectric effect. When the
dimensions of the QDs are of the same order of magnitude as the material
length scale, gradient elasticity theory should be used to account for the
size dependent of such nano-sized QDs. In this work the flexoelectric
theory is applied for 3D analysis of QDs with the functionally… More >
Open Access
ABSTRACT
Yuan Zhu1, 2, Xin Ning1, 2, Yao Zhang1, 2, Yuwan Yin1, 2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 11-12, 2021, DOI:10.32604/icces.2021.08311
Abstract High performance of the spacecraft structure is required in
the special environment, it includes mechanical performance and
operational performance, etc. When performing tasks, the
spaceborne equipment requires high precision. Therefore, the design
of lightweight, high stability and high reliability structure is essential
for spacecraft. Topology optimization is widely used in structural
design. However, there are some problems in the structure after
macro topology optimization, such as checkerboard, local optimal
solution and other phenomena. Despite a long calculation period, the
obtained structure is often not smooth enough and hard to
manufacture. Aiming to this issue, this paper proposes a combined
method… More >
Open Access
ABSTRACT
Marco Lo Cascio1, Marco Grifò1, Alberto Milazzo1, Ivano Benedetti1,*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 13-13, 2021, DOI:10.32604/icces.2021.08335
Abstract The Virtual Element Method (VEM) [1] is a recent numerical
technique that is capable of dealing with very general polygonal and polyhedral
mesh elements, including irregular or non-convex ones. Because of this feature,
the VEM ensures noticeable simplification in the data preparation stage of the
analysis, especially for problems whose analysis domain features complex
geometries, as in the case of computational micromechanics problems [2]. The
Boundary Element Method (BEM) [3] is a well-known, extensively used and
efficient numerical technique that has been successfully employed for the
computational homogenization of materials with complex morphologies [4]. Due
to its underlying formulation, the… More >
Open Access
ABSTRACT
Masaya Suzuki1,*, Manabu Ueno2, Koji Fukudome2, Yoji Okita1, Makoto Yamamoto2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.23, No.1, pp. 14-14, 2021, DOI:10.32604/icces.2021.08337
Abstract Recently, ceramic matrix composites (CMCs) are expected to utilize
for the components of gas turbine engines due to its low density, high strength,
and high rigidity in the high-temperature condition. The environmental barrier
coating (EBC) is a key technology for the practical application of CMC to
prevent surface regression from particulate and water vapor environments.
However, the anti-erosion characteristics of CMC and EBC have not been
clarified. In the present study, the authors performed numerical simulations of
particulate erosion phenomena in a high-pressure turbine first stage to
investigate the differences in the damage pattern and the performance
between particle sizes.… More >
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