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Two Efficient TimeMarching Explicit Procedures Considering Spatially/TemporallyDefined Adaptive TimeIntegrators Int. J. Comput. Methods (IF 2.193) Pub Date : 20210731
Delfim SoaresIn this paper, two explicit timemarching techniques are discussed for the solution of hyperbolic models, which are based on adaptively computed parameters. In both these techniques, time integrators are locally and automatically evaluated, taking into account the properties of the spatially/temporally discretized model and the evolution of the computed responses. Thus, very versatile solution techniques

Response Suppression of FGM Plate Using Piezoelectric Layers Under Parametric Uncertainty Conditions with Markovian Jump Approach Int. J. Comput. Methods (IF 2.193) Pub Date : 20210729
Habib Arabi, Ahmad Bagheri, Gholam Reza ZarepourIt should be noted that in addition to the geometry, constituent material also affects the strength and rigidity of the cylindrical shell, some factors that determine the transient response are its geometry and the constituent material. The capability of piezoelectric materials to adept their properties in reaction to environmental factors including electricity and loading is one of the major reasons

UNetBased Surrogate Model for Evaluation of Microfluidic Channels Int. J. Comput. Methods (IF 2.193) Pub Date : 20210724
Tuyen Quang Le, PaoHsiung Chiu, Chinchun OoiMicrofluidics have shown great promise in multiple applications, especially in biomedical diagnostics and separations. While the flow properties of these microfluidic devices can be solved by numerical methods such as computational fluent dynamics (CFD), the process of mesh generation and setting up a numerical solver requires some domain familiarity, while more intuitive commercial programs such as

Flight Simulation of Water Rocket Int. J. Comput. Methods (IF 2.193) Pub Date : 20210713
Shinichi Asao, Masashi Yamakawa, Kento Sawanoi, Seiichi TakeuchiThe flight of a water rocket involves complicated flows such as a gas–liquid twophase flow in a pressure tank and a jet flow in an ejection hole. It can be applied to various phenomena by developing a method of reproducing and analyzing complicated phenomena. We simulated the flight of a calculation model of a water rocket by computational fluid dynamics. We conducted the simulation to estimate the

Selective CellBased Smoothed Finite Element Method Using 10Node Tetrahedral Element with Radial Element Subdivision Int. J. Comput. Methods (IF 2.193) Pub Date : 20210707
Yuki OnishiA new optimal formulation of the selective cellbased smoothed finite element method using 10node tetrahedral elements (SelectiveCSFEMT10) is proposed for nearly incompressible large deformation problems. SelectiveCSFEMT10 is a generic name for SFEM formulations that apply the selective reduced integration (SRI) and the cellbased SFEM (CSFEM) simultaneously to the 10node tetrahedral (T10)

A Mathematical Analysis Method for Bending Problem of Clamped Shallow Spherical Shell on Elastic Foundation Int. J. Comput. Methods (IF 2.193) Pub Date : 20210707
Shanqing Li, Chunsheng Yang, Fengfei Xia, Hong YuanA mathematical analysis method is employed to solve the bending problem of slip clamped shallow spherical shell on elastic foundation. Using the slip clamped boundary conditions, the differential equations of the problem are simplified to a biharmonic equation. Using the Rfunction, the fundamental solution and the boundary equation of the biharmonic equation, a function is established. This function

Nonlinear Analysis of Frames with Shear Deformation using HigherOrder Mixed Finite Elements Int. J. Comput. Methods (IF 2.193) Pub Date : 20210621
J. Petrolito, D. IonescuUntil recently, linear analysis has been considered sufficient for the static analysis of structural frames. Nonlinear effects, if included, have tended to be considered at the element level rather than at the complete structure level. However, recent changes in codes of practice have been introduced that require a more complete nonlinear analysis to be performed. While these requirements should lead

A Smoothed GFEM Based on Taylor Expansion and Constrained MLS for Analysis of Reissner–Mindlin Plate Int. J. Comput. Methods (IF 2.193) Pub Date : 20210621
Tang Jinsong, Qian Linfang, Chen GuangsongBased on the Taylor Expansion and constrained moving least square function, a smoothed GFEM (SGFEM) is proposed in this paper for static, free vibration and buckling analysis of Reissner–Mindlin plate. The displacement function based on SGFEM is composed of classical linear finite element shape function and nodal displacement function, which are obtained by introducing the gradient smoothed meshfree

PerturbationBased Stochastic Meshless Method for Buckling Analysis of Plates Int. J. Comput. Methods (IF 2.193) Pub Date : 20210608
M. Aswathy, C. O. ArunThe current paper presents a perturbationbased stochastic eigenvalue buckling analysis of thin plates using element free Galerkin method. Spatial variation in Young’s modulus is modeled as a homogeneous random field and moving least squarebased shape function method is employed for discretizing the random field. Perturbation method is used to evaluate the statistics of buckling loads. Numerical examples

A Multiscale Failure Modeling Framework for Strain Localization in QuasiBrittle Materials Int. J. Comput. Methods (IF 2.193) Pub Date : 20210608
Wenjin Xing, Anthony D. MillerMacroscale mesh sensitivity and RVE size dependence are the two major issues that make the conventional homogenization techniques incapable of modeling the softening behavior of quasibrittle materials. In this paper, a new continuous–discontinuous multiscale modeling approach to failure is presented. Inspired by the classical crack band model of Bazant and Oh (1983), this approach is built upon an

Development of an Unresolved CFDDEM Method for Interaction Simulations Between Large Particles and Fluids Int. J. Comput. Methods (IF 2.193) Pub Date : 20210608
Shuchun Xiong, Shunhua Chen, Mengyan Zang, Tsubokura MakotoIn recent decades, growing efforts have been devoted to coupling the Computational Fluid Dynamics (CFD) and the Discrete Element Method (DEM), i.e., CFDDEM coupling methods, to account for particle–fluid interactions. However, it remains a challenging task for the wellknown Immersed Boundary Method (IBM) belonging to the resolved CFDDEM methods to improve the computational efficiency of large particles

Numerical Study of Grain Growth in Laser Powder Bed Fusion Additive Manufacturing of Metals Int. J. Comput. Methods (IF 2.193) Pub Date : 20210603
Zhida Huang, Zongyue Fan, Hao Wang, Bo LiLaser Powder Bed Fusion (LPBF) is an additive manufacturing method that manufactures high density and quality metal products. We present a coupled grain growth and heat transfer modeling technique to understand the materials microstructure evolution in metals during the cooling process of LPBF. The phasefield model is combined with a transient heat transfer equation to simulate the solidification

Dynamic Analysis of a Rotating FGM Beam with the Point Interpolation Method Int. J. Comput. Methods (IF 2.193) Pub Date : 20210529
Chaofan Du, Xiang Gao, Dingguo Zhang, Xiaoting ZhouThe dynamic characteristics of a hubfunctionally graded material beam undergoing large overall motions are studied. The deformation field of the flexible beam is described by using the assumed mode method (AMM), the finite element method (FEM) and the point interpolation method (PIM). Assuming that the physical parameters of functionally graded materials follow certain kind of power law gradient distribution

Automatic Adaptive Recovery Stress ESFEM for LowerBound Limit Load Analysis of Structures Int. J. Comput. Methods (IF 2.193) Pub Date : 20210529
Vu Hoang Le, Sawekchai Tangaramvong, Loc Vinh TranThe paper proposes a novel automatic adaptive recovery stress edgesmoothed finite element method (ESFEM) that determines the maximum load capacity of inelastic structures at plastic collapse. This approach performs solely a series of elastic ESFEM analyses with systematic modulus variations (considering the influences of stress singularity) to converge the collapse load solutions. The smoothed C0continuous

Structural Reliability Assessment Based on Subjective Uncertainty Int. J. Comput. Methods (IF 2.193) Pub Date : 20210529
Ying Liu, Jianyin Zhao, Zhigang Qu, Lin WangIn traditional structural reliability analysis, the uncertainties, such as loads and strengths, are considered as random variables with specific probability distributions. When the information is insufficient, it is difficult to obtain the distribution functions. Hence, experts are usually asked to estimate the belief degrees. Uncertainty theory is a branch of mathematics used to model the belief degrees

TwoDimensional Boundary Element Method Using Interval BSpine Wavelet Int. J. Comput. Methods (IF 2.193) Pub Date : 20210513
Qi Wei, Jiawei XiangA twodimensional (2D) boundary element method (BEM) is proposed by replacing traditional polynomial interpolation with onedimensional (1D) scaling functions of Bspine wavelet on the interval (BSWI). Potential problem and elasticity problem are investigated by BSWI BEM. For these two problems, the boundary variables represented by coefficients of wavelets expansions are transformed from wavelet space

A Fractal Model of Elastic–Plastic Contact Between Rough Surfaces for a LowVelocity Impact Process Int. J. Comput. Methods (IF 2.193) Pub Date : 20210513
Weibin Lan, Shouwen Fan, Shuai FanUnder the lowvelocity impact conditions, in order to study the contact load variation law of the ellipsoid elastic bodies, an elastic–plastic contact analysis model of rough ellipsoid surfaces is provided based on elastic–plastic fractal theory. A spherical elastic–plastic fractal model considering friction factors is established, and the spherical diameter density distribution function and elastic

Optimally Blended Spectral Elements in Structural Dynamics: Selective Integration and Mesh Distortion Int. J. Comput. Methods (IF 2.193) Pub Date : 20210513
Lars Radtke, David Müller, Alexander DüsterIn the field of structural dynamics, spectral finite elements are well known for their appealing approximation properties. Based on a special combination of shape functions and quadrature points, a diagonal mass matrix is obtained. More recently, the socalled optimally blended spectral element method was introduced, which further improves the accuracy but comes at the cost of a nondiagonal mass matrix

NonProbabilistic Reliability Bounds for Series Structural Systems Int. J. Comput. Methods (IF 2.193) Pub Date : 20210511
Xinzhou Qiao, Bing Wang, Xiurong Fang, Peng LiuMost of the current nonprobabilistic reliability methods are applicable for an individual component of a structure. However, a system consisting of interconnected components is involved in many engineering problems and its nonprobabilistic reliability analysis remains a major challenge. In this paper, a nonprobabilistic reliability method using upper and lower bound techniques is proposed for a

Element Differential Method for Solving Linear and Nonlinear Electromagnetic Problems Int. J. Comput. Methods (IF 2.193) Pub Date : 20210511
LanFang Gao, WeiZhe Feng, XiaoWei GaoA novel numerical method named element differential method (EDM) is first presented to solve linear and nonlinear static electromagnetic problems. The main idea of this method is to use the direct differentiation formulation of the shape functions of Lagrange isoparametric elements to evaluate geometry and physical variables. A new collocation method is proposed to establish the system of equations

A Novel Method for Nonlinear Boundary Value Problems Based on Multiscale Orthogonal Base Int. J. Comput. Methods (IF 2.193) Pub Date : 20210506
Yingchao Zhang, Liangcai Mei, Yingzhen LinIn this paper, a new algorithm is presented to solve the nonlinear secondorder differential equations. The approach combines the QuasiNewton’s method and the multiscale orthogonal bases. It is worth mentioning that the convergence of Newton’s method is verified for solving the nonlinear differential equations. The uniform convergence of the numerical solution as well as its derivatives are also proved

Solution of a Class of Nonlocal Elliptic BVPs Arising in Fluid Flow: An Iterative Approach Int. J. Comput. Methods (IF 2.193) Pub Date : 20210506
S. A. KhuriThe ultimate goal of this study is to implement a fixed point iterative scheme for the numerical solution of an extended class of nonlinear, nonlocal, elliptic boundary value problems. The method is based on applying wellknown fixed point procedures such as Mann’s and Picard’s to a tailored linear integral that is expressed in terms of a Green’s function. A proof of convergence that utilizes the contraction

The Local Singular Boundary Method for Solution of TwoDimensional Advection–Diffusion Equation Int. J. Comput. Methods (IF 2.193) Pub Date : 20210506
Karel Kovářík, Juraj MužíkThis work focuses on the derivation of the local variant of the singular boundary method (SBM) for solving the advectiondiffusion equation of tracer transport. Localization is based on the combination of SBM and finite collocation. Unlike the global variant, local SBM leads to a sparse matrix of the resulting system of equations, making it much more efficient to solve largescale tasks. It also allows

Formulation and Stability Analysis of a MultiScale Modeling Approach for Simulation of Elastic Wave Propagation Int. J. Comput. Methods (IF 2.193) Pub Date : 20210420
Siddhesh Raorane, Tadeusz Uhl, Pawel PackoIn this work, we report on the formulation and detailed stability analysis of a dynamic multiscale scheme involving two different local computational strategies for modeling of elastic wave propagation. The coupled model involves the Local Interaction Simulation Approach and Cellular Automata for Elastodynamics, however the presented analysis approach is general and applies to other numerical techniques

Numerical Simulation of the Convection–Diffusion PDEs on a Sphere with RBFFD and RBFQR Methods Int. J. Comput. Methods (IF 2.193) Pub Date : 20210420
Nazakat Adil, Xinlong Feng, Yinnian He, Xufeng XiaoThe aim of this paper is to investigate the application of radial basis functiongenerated finite difference (RBFFD) methods for convection–diffusion partial differential equations (PDEs) on a sphere. In the application of RBFFD method, choosing a reasonable value of shape parameter is important to the computation of PDEs. The work is devoted to the numerical study of the range of near optimal shape

A Nonintrusive Parametrized ReducedOrder Model for Periodic Flows Based on Extended Proper Orthogonal Decomposition Int. J. Comput. Methods (IF 2.193) Pub Date : 20210420
Teng Li, Shiyuan Deng, Kun Zhang, Haibo Wei, Runlong Wang, Jun Fan, Jianqiang Xin, Jianyao YaoThe periodic flows, such as vortex shedding and rotating flow in turbomachinery, are very common in both scientific and engineering fields. However, highfidelity numerical simulations of unsteady flows are usually timeconsuming, particularly when varying flow parameters need to be considered. In this paper, a novel nonintrusive parametrized reduced order model (PROM) approach for prediction of periodic

Maximizing the Load Carrying Capacity of a Variable Stiffness Composite Cylinder Based on the MultiObjective Optimization Method Int. J. Comput. Methods (IF 2.193) Pub Date : 20210420
Yaochen Zheng, Ben Han, Jianqiao Chen, Jifan Zhong, Junxiang LiVariable stiffness (VS) composite structures can greatly increase the composite designability and thus have attracted much attention in recent years. This paper focuses on the maximization of load carrying capacity of VS composite cylinders under different loading cases, and the multiobjective optimization method is used to get the optimal results. First, the VS composite cylinder is optimized under

Debonding Analysis of Adhesively Bonded Pipe Joints Subjected to Combined Thermal and Mechanical Loadings Int. J. Comput. Methods (IF 2.193) Pub Date : 20210412
Hong Yuan, Jun Han, Huanliang Zhang, Lan ZengIn order to better understand the interfacial debonding behavior of pipe joints during the whole loading process, an analytical solution for the fullrange behavior of adhesively bonded pipe joints under combined thermal and mechanical tensile loadings is presented in this paper. The solution was developed based on a simplified rigidsoftening bond–slip model, and two cases with different softening

Contact Analysis Based on a Linear Strain NodeBased Smoothed Finite Element Method with Linear Complementarity Formulations Int. J. Comput. Methods (IF 2.193) Pub Date : 20210412
Yan Li, Junhong YueThis paper presents the nodebased smoothed finite element method with linear strain functions (NSFEML) for solving contact problems using triangular elements. The smoothed strains are formulated by a complete order of polynomial functions and normalized with reference to the central points of smoothing domains. They are one order higher than those adopted in the finite element method (FEM) and the

FullScale Bounds Estimation for the Nonlinear Transient Heat Transfer Problems with Interval Uncertainties Int. J. Comput. Methods (IF 2.193) Pub Date : 20210412
Ruifei Peng, Haitian Yang, Yanni XueA package solution is presented for the fullscale bounds estimation of temperature in the nonlinear transient heat transfer problems with small or large uncertainties. When the interval scale is relatively small, an efficient Taylor series expansionbased bounds estimation of temperature is stressed on the acquirement of first and secondorder derivatives of temperature with high fidelity. When the

Iterative Approximation of Preconditioning Matrices Through KrylovType Solver Iterations Int. J. Comput. Methods (IF 2.193) Pub Date : 20210412
Noriyuki Kushida, Hiroshi OkudaLinear equation solvers require considerable computational time in many computer simulation methods, such as the stress analysis using the finite element method (FEM), or the fluid dynamics using an implicit time integration scheme. Because of their favorable nature to modern supercomputers, Krylovtype linear equation solvers have become dominant. Krylovtype solvers are usually used with preconditioners

An Equivalent Identification Method for Dynamic Loads Acting on Nonlinear Structures Int. J. Comput. Methods (IF 2.193) Pub Date : 20210412
Zhongbo Yu, Kun Li, Jie Liu, Cheng Lu, Xiaobing BuAn efficient dynamic load identification method for nonlinear structures is proposed. Assuming that the nonlinear elements of a structure can be separated, or the structural kinetic equation can be available, the whole structural damping and stiffness matrices can be divided into linear and nonlinear sub matrices. Regarding the effects of the nonlinear elements on the linear ones as dynamic load constraints

Effect of Elevated Temperature on Concrete Structures by Discontinuous Boundary Element Method Int. J. Comput. Methods (IF 2.193) Pub Date : 20210407
Petr P. ProchazkaChanges in the thermomechanical properties of fiberreinforced concrete (FRC) exposed to fire are fundamentally affected by the type and volume fraction of fibers. Because the loss of FRC loadbearing capacity is mainly caused by structural damage, a new numerical procedure based on a modified method of discontinuous boundary elements (DBEM) is proposed, which is modified to include thermomechanical

Heat Transfer in Periodically Laminated Structures – Third Type Boundary Conditions Int. J. Comput. Methods (IF 2.193) Pub Date : 20210316
Ewelina PazeraThis work is about a heat transfer phenomenon in relation to the periodically laminated composite. The specific type of thermal loading, analyzed in this paper, require formulation of Robin boundary conditions. To consider a layered structure of analyzed composite, the tolerance averaging technique is used. This method allows to take into account a thickness of the layers and obtain the equations with

Calculation of Stress/Displacement Field of Mechanical Joint Structure Based on Layered Elastic Theory Int. J. Comput. Methods (IF 2.193) Pub Date : 20210129
Yang Yang, Qingchao Sun, Zhihao Fan, Xianlian Zhang, Lintao WangVarious types of machinery are not a continuous whole, but are assembled from various parts according to specific requirements. The surfaces that contact each other between different parts are often called mechanical joints. The stress/displacement field of the mechanical joint structure is the basis for predicting the mechanical properties of the assembly, optimizing the structure and the assembly

αFinite Element Method for Frictionless and Frictional Contact Including Large Deformation Int. J. Comput. Methods (IF 2.193) Pub Date : 20210330
Sandeep Kshirsagar, Changkye Lee, Sundararajan NatarajanIn this paper, one of the variants of the smoothed finite element method, αFEM is adopted for hyperelastic material with large deformation and contact nonlinearity in two dimensions. The salient feature of the αFEM is that it is stable and this is accomplished by using the scale factor α∈[0,1] to combine the compatible finite element method and the nodebased smoothed finite element method. The framework

Numerical Simulations Using Eulerian Schemes for the Vlasov–Poisson Model Int. J. Comput. Methods (IF 2.193) Pub Date : 20210330
Denis Lorenzon, Sergio A. Elaskar, Andrés M. CiminoThe Vlasov equation describes the temporal evolution of the distribution function of particles in a collisionless plasma and, if magnetic fields are negligible, the mean electric field is prescribed by Poisson equation. Eulerian numerical methods discretize and directly solve the Vlasov equation on a mesh in phase space and can provide high accuracy with low numerical noise. In this paper, we present

Wavelet Lifting Scheme for the Numerical Solution of Dynamic Reynolds Equation for Micropolar Fluid Lubrication Int. J. Comput. Methods (IF 2.193) Pub Date : 20210330
S. C. Shiralashetti, M. H. Kantli, A. B. DeshiRecently, wavelet theory has become a well recognized promising tool in science and engineering field; especially, wavelets are successfully used in fast algorithms for easy execution. In this paper, we developed wavelet lifting scheme using orthogonal and biorthogonal wavelets for the numerical solution of dynamic Reynolds equation for micropolar fluid lubrication. The numerical results gained through

A Multidisciplinary Approach for Optimization Design of CNC Machine Tools Int. J. Comput. Methods (IF 2.193) Pub Date : 20210320
ThiNa Ta, YunnLin Hwang, JengHaur HorngThe main objective of this research is to propose a multidisciplinary approach for the development and design of Computer Numerical Control (CNC) machine tools using numerical optimization methods combined MultiBody Dynamic (MBD) analysis and to control design cosimulation. Metamodels based Sequential Approximate Optimization (SAO) for the cosimulation optimization problems are developed. The metamodels

HighLow Level Support Vector Regression Prediction Approach (HLSVR) for Data Modeling with Input Parameters of Unequal Sample Sizes Int. J. Comput. Methods (IF 2.193) Pub Date : 20210320
Maolin Shi, Liye Lv, Zhenggang Guo, Wei Sun, Xueguan Song, Hongyou LiSupport vector regression (SVR) has been widely used to reduce the high computational cost of computer simulation. SVR assumes the input parameters have equal sample sizes, but unequal sample sizes are often encountered in engineering practices. To solve this issue, a new prediction approach based on SVR, namely as highlow level SVR approach (HLSVR) is proposed for data modeling of input parameters

On the Topology Update of the Numerical Manifold Method for Multiple Crack Propagation Int. J. Comput. Methods (IF 2.193) Pub Date : 20210320
Jun He, Shuling Huang, Xiuli Ding, Yuting Zhang, Dengxue LiuCrack initiation and propagation are the two key issues of concern in the geotechnical engineering. In this study, the numerical manifold method (NMM) is applied to simulate crack propagation and the topology update of the NMM for multiple crack propagation is studied. The cracktip asymptotic interpolation function is incorporated into the NMM to increase the accuracy of the cracktip stress field

Numerical Simulation of a 2D Layered Anode for use in LithiumIon Batteries Int. J. Comput. Methods (IF 2.193) Pub Date : 20210320
Alexander GalashevAn important technological problem is solved by numerical methods. Doping of silicene with phosphorus allows changing the morphology of the walls of the silicene channel without reducing their strength. The structure of lithium packings in the channels is studied in detail. The distribution of normal stresses in the walls of the channel before lithium intercalation and after complete lithium filling

Simpson’s Rule Revisited Int. J. Comput. Methods (IF 2.193) Pub Date : 20210312
Slavko Simić, Bandar BinMohsinIn this paper, we give some refinements of Simpson’s rule in cases when it is not applicable in its classical form i.e., when the target function is not four times differentiable on a given interval. Some sharp twosided inequalities for an extended form of Simpson’s rule are also proven.

Meshless Numerical Simulation of Singular Fields at Crack Tips of Branched Crack Int. J. Comput. Methods (IF 2.193) Pub Date : 20210312
Yinghua Bai, Ran Tian, Xu Tang, LinHao Kong, JiaHui Liu, Fenghua NieOne of the most important tasks in the numerical analysis of the fracture problem is to achieve a highprecision approximation of the singular stress fields at crack tips. Partially or fully enriched basis functions are often used as enhancements on the whole problem domain or just near the crack tips when constructing the meshless shape functions to simulate the singularity fields at crack tips, namely:

A Novel CellCentered Approach of Upwind Types for Convection Diffusion Equations on General Meshes Int. J. Comput. Methods (IF 2.193) Pub Date : 20210312
Hung Vu, Nguyen Huu Du, Thanh Hai OngIn this paper, we present novel cellcentered finite element methods for the convectiondominated convection–diffusion problems on the general meshes. The proposed schemes can be constructed from a general mesh by building with a dual mesh and its triangular submesh. Moreover, the schemes are based on piecewise linear functions combined with two upwind techniques on the dual submesh in order to stabilize

A Novel Family of TwoStage Implicit Time Integration Schemes for Structural Dynamics Int. J. Comput. Methods (IF 2.193) Pub Date : 20210312
Wooram Kim, J. N. ReddyIn this paper, a new family of composite implicit time schemes is developed to overcome some shortcomings of the existing composite schemes. In the development, unconventional time approximations are used for the displacement and velocity vectors. The algorithmic parameters of the approximations are optimized to have improved numerical characteristics. This study also explains some difficulties of

TwoLevel DefectCorrection Stabilized Finite Element Method for the Incompressible Navier–Stokes Equations Based on Pressure Projection Int. J. Comput. Methods (IF 2.193) Pub Date : 20210312
Juan Wen, Yu WangIn this paper, we propose the twolevel defectcorrection stabilized finite element method based on pressure projection for solving the incompressible Navier–Stokes equations. The new method combines the twolevel method and the defectcorrection strategy with the stabilized method based on pressure projection. It has the good properties of these three methods, such as high efficiency, good stability

Meshless Numerical Analysis of Phase Change Problems in Artificial Freezing Technology Applied in GeoMedia Int. J. Comput. Methods (IF 2.193) Pub Date : 20210312
Peipei Chen, Guangchang Yang, Nan WuNumerical solutions to heat conduction problems involving phase change have traditionally been obtained using the gridbased finite difference or finite element methods. However, due to the unique mathematical form of the equations and the limitations of the grid algorithm, difficulties may arise in solutions. In this study, smooth particle hydrodynamics (SPH) method is used to calculate heat conduction

Monitoring and Analysis of Ancient Building Columns on the Basis of Relative Dynamic Method Int. J. Comput. Methods (IF 2.193) Pub Date : 20210308
Xiufang Wang, Guohua Li, Jun Dong, Jihang LiDuring the service period of ancient building structures, due to the cumulative development of local damage to loadbearing members such as columns, the structural strength and stiffness will decrease, which may lead to catastrophic accidents. The traditional damage recognition method based on modal parameters is sometimes not effective. In this study, the vibration analysis combined with the relative

Dynamic Response of the Piezoelectric Materials Based on CellBased Smoothed Finite Element Method in Hygrothermal Environment Int. J. Comput. Methods (IF 2.193) Pub Date : 20210308
Liming Zhou, Jinghao Tang, Yuan Wei, Ming Li, Xiaolin LiIn this paper, the dynamic response of piezoelectric structures under hygrothermal environment is studied by using cellbased smoothed finite element method (CSFEM). Ignoring the influence of temperature and moisture on the response of elastic matrix, we derive the basic equations of the piezoelectric materials under hygrothermal environment. Then the CSFEM equations of piezoelectric problem are

Contact Analysis Within the BiPotential Framework Using CellBased Smoothed Finite Element Method Int. J. Comput. Methods (IF 2.193) Pub Date : 20210308
Qianwei Chen, Yan Li, Zhiqiang Feng, Huijian ChenThis paper presents a cellbased smoothed finite element method (CSFEM) for solving twodimensional contact problems with the bipotential formulation. The contact force and the relative displacements on the contact surface are coupled with each other. The Uzawa algorithm, which is a local iterative technique, is used to solve the contact force. The classic Coulomb friction rule and a unilateral contact

A Global Sensitivity Analysis Method for MultiInput MultiOutput System and its Application in Structural Design Int. J. Comput. Methods (IF 2.193) Pub Date : 20210308
Qiming Liu, Nichen Tong, Xu HanCommonly, variancebased global sensitivity analysis methods are popular and applicable to quantify the impact of a set of input variables on output response. However, for many engineering practical problems, the output response is not single but multiple, which makes some traditional sensitivity analysis methods difficult or unsuitable. Therefore, a novel global sensitivity analysis method is presented

Optimization Method of the Multistage Axial Compressors Using CFD Simulation Int. J. Comput. Methods (IF 2.193) Pub Date : 20210308
Grigorii Popov, Igor Egorov, Evgenii Goriachkin, Oleg Baturin, Daria Kolmakova, Valery MatveevThe current level of numerical methods of gas dynamics makes it possible to optimize compressors using 3D CFD models. However, the methods and means are not sufficiently developed for their wide application. This paper describes a new method for the optimization of multistage axial compressors based on 3D CFD modeling and summarizes the experience of its application. The developed method is a complex

Evaluation of Rounding Functions in Nearest Neighbor Interpolation Int. J. Comput. Methods (IF 2.193) Pub Date : 20210308
Olivier RukundoA novel evaluation study of the most appropriate round function for nearest neighbor image interpolation is presented. Evaluated rounding functions are selected among the five rounding rules defined by the Institute of Electrical and Electronics Engineers IEEE 7542008 standard. Both full and noreference image quality assessment metrics are used to evaluate the influence of rounding functions on

Thermal Elastic–Plastic Analysis of ThreeDimensional Structures Using FaceBased Smoothed Point Interpolation Method Int. J. Comput. Methods (IF 2.193) Pub Date : 20210308
Yudong Zhong, Guizhong Xie, JunJian Hou, Wenbin He, Yuan LiIn this work, a facebased smoothed point interpolation method (FSPIM) is formulated for threedimensional (3D) thermal elasticplastic analysis of structures. For this method, field functions are approximated using second order PIM shape functions and the facebased smoothing domains are used to perform the numerical integration. The material properties are considered to be temperaturedependent

Transient Response Analysis of Underwater Structures Based on Total Field Formulas and Modified Highorder Transmission Boundary Int. J. Comput. Methods (IF 2.193) Pub Date : 20210303
Zibin Zhao, S. M. Li, Yihui YinThe scaled boundary finite element method (SBFEM) has obvious advantages in simulating both finite and infinite domains. However, the present highorder transmission boundary of SBFEM has a problem in numerical stability, especially for 3D fluid–structure interaction (FSI) problems. In this paper, a modified method is put forward to improve the numerical stability of the highorder transmission boundary

An Improved Reflectance Prediction Model for Halftone Printing Dot Based on Monte Carlo Method Int. J. Comput. Methods (IF 2.193) Pub Date : 20210225
Honghao Liu, Kaixing Zhang, Xianxi Liu, Jinxing Wang, Heow Pueh LeeThe improved reflectance prediction model for printing dot was established with the Monte Carlo method. Reflectance model is a useful approach to predict and control printing quality, which was widely used in color duplication field. The Monte Carlo prediction model for printing dot is a simulation model, satisfying industrial virtual reality needs, which could simulate reflectance data as well as

A Relation of Preconditioners in Domain Decomposition Method for Magnetostatic Problems Int. J. Comput. Methods (IF 2.193) Pub Date : 20210225
Hiroshi Kanayama, Masao Ogino, ShinIchiro Sugimoto, Hongjie Zheng, Kaworu YodoAn iterative domain decomposition method is proposed for numerical analysis of 3dimensional (3D) linear magnetostatic problems taking the magnetic vector potential as an unknown function. The iterative domain decomposition method is combined with the preconditioned conjugate gradient (PCG) procedure and the hierarchical domain decomposition method (HDDM) which is adopted in parallel computing. Our

A CellBased Smoothed Finite Element Method for Arbitrary Polygonal Element to Solve Incompressible Laminar Flow Int. J. Comput. Methods (IF 2.193) Pub Date : 20210225
Mingyang Liu, Guangjun Gao, Huifen Zhu, Chen Jiang, Guirong LiuIn this paper, a cellbased smoothed finite element method using the arbitrary nsided polygonal element (CSFEMPoly) is developed to solve fluid mechanics problems. A stabilization method, characteristicbased split coupled with stabilized pressure gradient projection (CBS/SPGP), is employed to deal with numerical oscillations for CSFEMPoly. We validate CSFEMPoly and test its numerical behaviors

A Comparison Between WeaklyCompressible Smoothed Particle Hydrodynamics (WCSPH) and Moving Particle SemiImplicit (MPS) Methods for 3D DamBreak Flows Int. J. Comput. Methods (IF 2.193) Pub Date : 20210108
Rubens A. Amaro Junior, LiangYee Cheng, Sergei K. BuruchenkoLagrangian particlebased methods have opened new perspectives for the investigation of complex problems with large freesurface deformation. Some wellknown particlebased methods adopted to solve nonlinear hydrodynamics problems are the smoothed parti cle hydrodynamics (SPH) and the moving particle semiimplicit (MPS). Both methods model the continuum by a system of Lagrangian particles (points)