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Two-scale modeling of granular materials: A FEM-FEM approach

Yun-Zhu CAI, Yu-Ching WU

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3, Pages 304-315 doi: 10.1007/s11709-013-0213-y

Abstract: In the present paper, a homogenization-based two-scale FEM-FEM model is developed to simulate compactionsThe granular structure consisting of two-dimensional grains is modeled by the microscopic finite elementmethod at the small-scale level, and the homogenized viscous assembly is analyzed by the macroscopic finiteelement method at large-scale level.The two-scale FEM-FEM model is developed in which each particle is treated individually with the appropriate

Keywords： homogenization two-scale representative volume element compaction granular assembly finite element method

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The smoothed finite element method (S-FEM): A framework for the design of numerical models for desired

Gui-Rong Liu

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2, Pages 456-477 doi: 10.1007/s11709-019-0519-5

Abstract:

The smoothed finite element method (S-FEM) was originated by G R Liu by combining some meshfree techniqueswith the well-established standard finite element method (FEM).article first provides a concise and easy-to-follow presentation of key formulations used in the S-FEMimpact on AI-assisted modeling and simulation.This novel concept of numerical model on-demand may drastically change the landscape of modeling and

Keywords： computational method finite element method smoothed finite element method strain smoothing technique

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3D finite element method (FEM) simulation of groundwater flow during backward erosion piping

Kristine VANDENBOER,Vera van BEEK,Adam BEZUIJEN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2, Pages 160-166 doi: 10.1007/s11709-014-0257-7

Abstract: Backward erosion piping is an important failure mechanism for cohesive water retaining structures which are founded on a sandy aquifer. At present, the prediction models for safety assessment are often based on 2D assumptions. In this work, a 3D numerical approach of the groundwater flow leading to the erosion mechanism of backward erosion piping is presented and discussed. Comparison of the 2D and 3D numerical results explicitly demonstrates the inherent 3D nature of the piping phenomenon. In addition, the influence of the seepage length is investigated and discussed for both piping initiation and piping progression. The results clearly indicate the superiority of the presented 3D numerical model compared to the established 2D approach. Moreover, the 3D numerical results enable a better understanding of the complex physical mechanism involved in backward erosion piping and thus can lead to a significant improvement in the safety assessment of water retaining structures.

Keywords： backward erosion piping groundwater flow 3D finite element method (FEM)

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Concurrent fatigue crack growth simulation using extended finite element method

Zizi LU, Yongming LIU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3, Pages 339-347 doi: 10.1007/s11709-010-0078-2

Abstract: analysis is proposed using a novel small time scale model for fatigue mechanism analysis and the extended finiteelement method (X-FEM) for fatigue crack growth simulation.The X-FEM greatly facilitates crack growth simulation without remeshing requirements ahead of the cracktip as in the classical finite element method.The basic concept and theory of X-FEM was briefly introduced and numerical predictions of stress intensity

Keywords： small time scale model extended finite element method (X-FEM) crack growth multiaxial

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Maximum entropy based finite element analysis of porous media

Emad NOROUZI, Hesam MOSLEMZADEH, Soheil MOHAMMADI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2, Pages 364-379 doi: 10.1007/s11709-018-0470-x

Abstract: The maximum entropy theory has been used in a wide variety of physical, mathematical and engineering applications in the past few years. However, its application in numerical methods, especially in developing new shape functions, has attracted much interest in recent years. These shape functions possess the potential for performing better than the conventional basis functions in problems with randomly generated coarse meshes. In this paper, the maximum entropy theory is adopted to spatially discretize the deformation variable of the governing coupled equations of porous media. This is in line with the well-known fact that higher-order shape functions can provide more stable solutions in porous problems. Some of the benchmark problems in deformable porous media are solved with the developed approach and the results are compared with available references.

Keywords： maximum entropy FEM fully coupled multi-phase system porous media

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Multiscale stochastic finite element method on random field modeling of geotechnical problems – a fast

Xi F. XU

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2, Pages 107-113 doi: 10.1007/s11709-014-0268-4

Abstract: The Green-function-based multiscale stochastic finite element method (MSFEM) has been formulated based

Keywords： multiscale finite element settlement perturbation random field geotechnical

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Moisture diffusion behavior of permeable fiber-reinforced polymer composite

Jianjiang YANG, Qingsheng YANG, Lianhua MA, Wei LIU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3, Pages 347-352 doi: 10.1007/s11465-010-0093-y

Abstract: A unit cell approach is employed to predict the effective moisture diffusion property in fiber-reinforced biopolymer. The permeable fibers distributed in the matrix are taken as inclusion phases in the system. Based on a unit cell model, the calculation method for moisture diffusion coefficients is developed in this paper. Moisture diffusion property and effective diffusion coefficients are numerically investigated under different temperature and volume fractions of fibers. The calculated results agree well with Gueribiz’s solutions. Therefore, it is reliable in predicting moisture diffusion property of composite using the unit cell model. The present result shows that the effective diffusion coefficient of a composite depends on both temperature and volume fraction of fibers. The effective diffusion coefficient of regular hexagon pattern composite is larger than that of square pattern at the same temperature and volume fraction.

Keywords： fiber-reinforced biopolymer effective diffusion coefficient unit cell finite element modeling (FEM)

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Finite element modeling of thermo-active diaphragm walls

Yi RUI, Mei YIN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3, Pages 646-663 doi: 10.1007/s11709-020-0584-9

Abstract: In this paper, a series of detailed finite element analyses are carried out to capture the fully coupled

Keywords： thermo-active diaphragm wall finite element analysis thermo-hydro-mechanical coupling ground source heat

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Finite element analysis of controlled low strength materials

Vahid ALIZADEH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5, Pages 1243-1250 doi: 10.1007/s11709-019-0553-3

Abstract: This paper describes the numerical modeling of CLSM fills with finite element method under compressionThe capability of the finite element approach for the analysis of CLSM fills was assessed by a comparison

Keywords： CLSM finite element method compressive strength pullout numerical modeling plastic damage model

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FEM-based strain analysis study for multilayer sheet forming process

Rongjing ZHANG,Lihui LANG,Rizwan ZAFAR

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4, Pages 373-379 doi: 10.1007/s11465-015-0371-9

Abstract: To further explore the novel method, this study conducts a finite element method-based (FEM-based) strain

Keywords： finite element method (FEM) strain analysis multilayer sheet forming

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Structural characteristics of cement-stabilized soil bases with 3D finite element method

Yunfeng PENG, Yunlong HE,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4, Pages 428-434 doi: 10.1007/s11709-009-0059-5

Abstract: In this paper, the 3D elastic-plastic finite element method (FEM) was used to analyze the mechanical

Keywords： different strength asphalt-concrete pavement FEM appropriate stiffness

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Finite element modeling of environmental effects on rigid pavement deformation

Sunghwan KIM,Halil CEYLAN,Kasthurirangan GOPALAKRISHNAN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2, Pages 101-114 doi: 10.1007/s11709-014-0254-x

Abstract: In this study, finite element (FE)-based primary pavement response models are employed for investigating

Keywords： concrete pavements (JPCP) curling and warping sensitivity analyses rigid pavement analysis and design finiteelement analysis (FEA)

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Prediction of vertical displacement for a buried pipeline subjected to normal fault using a hybrid FEM-ANN

Frontiers of Structural and Civil Engineering 2024, Volume 18, Issue 3, Pages 428-443 doi: 10.1007/s11709-024-1015-0

Abstract: For this purpose, a finite element model is developed for a pipeline subjected to normal fault displacements

Keywords： buried pipelines normal Fault finite element method multilayer perceptron neural network formulation

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Lamb wave propagation modeling for structure health monitoring

Xiaoyue ZHANG, Shenfang YUAN, Tong HAO

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3, Pages 326-331 doi: 10.1007/s11465-009-0045-6

Abstract: The local interaction simulation approach, used for modeling sharp interfaces and discontinuities inThis modeling is based on the local interaction simulation approach theory and is finally accomplishedthrough the finite elements software Ansys11.The finite difference equations describing wave propagation used in the LISA/SIM theory are obtained.Finally, the Lamb waves propagation modeling is implemented.

Keywords： Lamb wave modeling LISA/SIM theory finite difference equation finite element

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Finite element modeling of counter-roller spinning for large-sized aluminum alloy cylindrical parts

Dawei ZHANG, Fan LI, Shuaipeng LI, Shengdun ZHAO

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3, Pages 351-357 doi: 10.1007/s11465-019-0528-z

Abstract: Thus, a finite element (FE) model of CRS was developed with the FORGE code via meshing technology, materialmodeling, determining the friction condition, and so on.

Keywords： large-sized cylindrical part counter-roller spinning aluminum alloy finite element method distributed