Search results for: Chuanzeng Zhang

Items from 1 to 20 out of 175 results

article

Frequency‐domain fundamental solutions and boundary element method for consistent couple stress elastodynamic problems

Jun Lei, Caixia Shao, Chuanzeng Zhang

International Journal for Numerical Methods in Engineering > 124 > 22 > 4992 - 5019

In this article, the elastodynamic problems are investigated within the framework of a consistent couple‐stress theory (CCST). The basic equations for the CCST elastodynamic problems are derived at first. These dynamic formulas are then analyzed in the frequency domain by the Fourier transform. The frequency‐domain fundamental solutions to the transformed elastodynamic problems are subsequently derived...

article

Development of a FEM tool to calculate the dispersion curves of 2D phononic structures

Christopher Nies, Marius Mellmann, Benjamin Ankay, Chuanzeng Zhang

PAMM > 23 > 1 > n/a - n/a

The control and manipulation of acoustic and elastic waves is an important research topic in engineering sciences. In acoustics, an adequate combination of different materials can contribute to an efficient and broadband sound isolation. The realization of a vibration‐free environment for high‐precision mechanical systems in laboratories and measuring environments is also desirable in many practical...

article

Reanalysis of structures with varying cross‐sectional values based on influence functions

Oliver Carl, Friedel Hartmann, Chuanzeng Zhang

PAMM > 21 > 1 > n/a - n/a

Digital building data models are increasingly employed in the design and construction planning of buildings, so that almost the entire planning process is covered with three‐dimensional (3D) models. Starting with available detailed CAD data it is easy to generate 3D models for the design analysis. However, this comes with a price since the complexity of the 3D models requires a high computational...

article

Topological electromagnetic and elastic states in phoxonic crystal cavity arrays

Tian-Xue Ma, Chuanzeng Zhang, Yue-Sheng Wang

PAMM > 20 > 1 > n/a - n/a

In this paper, we investigate the topological characteristics of the phoxonic crystal (PxC) arrays. For the PxC system, the electromagnetic transverse electric mode and the elastic in‐plane mode are considered. The PxC possesses the photonic and phononic bandgaps simultaneously. Based on the bandgaps, we design the PxC cavity which can confine the electromagnetic and elastic waves. The interaction...

article

A Chebyshev collocation method for band structure calculations of the longitudinal elastic waves in phononic crystals

Leilei Cao, Yan Gu, Hao Fan, Chuanzeng Zhang

PAMM > 20 > 1 > n/a - n/a

In this study, a Chebyshev collocation method (CCM) is developed and applied to calculate the band structures of longitudinal elastic waves in periodically multi‐layered phononic crystals. The general form of the CCM for a unit‐cell is derived, in which the periodic boundary conditions and continuity conditions on the interface between different component materials are imposed directly to the CCM...

article

Numerical analysis of wave mixing in 3‐D infinite elastic solids with a spherical damage

Benjamin Ankay, Chuanzeng Zhang

PAMM > 20 > 1 > n/a - n/a

In this paper the 3‐D wave propagation in an infinite elastic solid with a spherical damage is numerically simulated by a mapped staggered Chebyshev pseudo‐spectral collocation method. In the numerical simulation process, the so‐called Convolutional‐Perfectly‐Matched‐Layers (CPML) are used to model the absorbing boundaries and the wave excitations are specified inside the corresponding physical domain...

article

Determination of the sound insulation property of 2D periodic wall structures by a fluid‐structure interaction model

Elias Perras, Chuanzeng Zhang

PAMM > 20 > 1 > n/a - n/a

The propagation of acoustic and elastic waves in periodical structures, often referred to as phononic crystals (PCs), can be drastically restricted. In the so‐called band‐gaps, which are certain frequency ranges, the wave propagation is prohibited in the PCs. The location and the width of the band‐gaps are determined by the geometrical and the material properties of the PCs. The purpose of this work...

article

Influence of the geometric nonlinearity on the wave propagation properties of periodic lattice frame structures

Marius Mellmann, Chuanzeng Zhang

PAMM > 20 > 1 > n/a - n/a

The elastic wave propagation and vibration characteristics of periodic lattice frame structures can be tuned by changing the density or the stiffness of the structural components, adding certain local resonators or pre‐deforming some structural members [1, 2]. In this way, it is possible to generate the so‐called band‐gaps, which are certain frequency ranges, in which the propagation of elastic or...

article

Magnetically Controllable Piezotronic Responses in a Composite Semiconductor Fiber with Multiferroic Coupling Effects

Ruoran Cheng, Chunli Zhang, Chuanzeng Zhang, Weiqiu Chen

physica status solidi (a) > 217 > 2 > n/a - n/a

Semiconductors In article number 1900621, Chunli Zhang and co‐workers propose a multiferroic composite semiconductor (MCS) fiber consisting of two outer piezomagnetic layers (PM), two piezoelectric layers (PE) and a semiconducting core, and theoretically demonstrate that one can effectively manipulate the behaviors of carries such as transport properties with an applied magnetic field through magneto‐electro‐semiconductive...

article

Magnetically Controllable Piezotronic Responses in a Composite Semiconductor Fiber with Multiferroic Coupling Effects

Ruoran Cheng, Chunli Zhang, Chuanzeng Zhang, Weiqiu Chen

physica status solidi (a) > 217 > 2 > n/a - n/a

Herein, a multiferroic composite semiconductor (MCS) fiber, in which the carriers transport behaviors can be effectively controlled by applying a magnetic field, is proposed. The fiber consists of two outer piezomagnetic (PM) layers, two piezoelectric (PE) layers, and a semiconducting core, and hence exhibits the comprehensive magneto–electro–semiconductive (MES) coupling effects. Based on the basic...

article

Analysis of acoustic wave propagation in composite laminates via a spectral element method

Elias Perras, Chuanzeng Zhang

PAMM > 19 > 1 > n/a - n/a

The analysis of the acoustic or elastic wave propagation phenomena in the time‐domain is computationally expensive. An often‐cited rule of thumb is to use at least ten nodes per wavelength if using quadratic shape functions, and even more nodes are necessary in order to achieve highly accurate numerical results. For large‐scale problems, this results in a large system of linear algebraic equations,...

article

Numerical study of nonlinear elastic wave propagation in locally damaged engineering structures

Benjamin Ankay, Chuanzeng Zhang

PAMM > 19 > 1 > n/a - n/a

In this paper, the two‐dimensional (2‐D) ultrasonic wave propagation problem in an elastic half‐space with a localized damaged zone is numerically simulated by a mapped Chebyshev pseudo‐spectral collocation method [1]. The considered damaged zone, which is embedded in an undamaged host medium, is modelled by a nonlinear elastic and viscoelastic constitutive law. Classical nonlinear elastic and nonclassical...

article

SH wave generated Lamb wave in a plate with a localized region of material nonlinearity

Yanzheng Wang, Weiqiu Chen, Chuanzeng Zhang

PAMM > 19 > 1 > n/a - n/a

Higher harmonics are sensitive to micro‐defects, which can be utilized in the development of nonlinear ultrasonic techniques (NLUTs). Thus, the higher harmonic generation by material nonlinearity has attracted considerable attention. However, few works have been done on the elastic wave propagation in a finite structure with a localized region of material nonlinearity. The propagation of the SH wave...

article

Tuning of vibration and wave propagation characteristics in pre‐deformed periodic lattice frame structures

Marius Mellmann, Chuanzeng Zhang

PAMM > 19 > 1 > n/a - n/a

The design, optimization and application of periodic materials and structures, such as phononic crystals and structures, are receiving increasing attention in recent years. Such materials and structure can manipulate the characteristics of the elastic and acoustic wave propagation [1]. Thus, it is feasible to create the so‐called band‐gaps, designating certain frequency ranges, in which the propagation...

article

Localized method of fundamental solutions for three-dimensional inhomogeneous elliptic problems: theory and MATLAB code

Yan Gu, Chia-Ming Fan, Wenzhen Qu, Fajie Wang, more

Computational Mechanics > 2019 > 64 > 6 > 1567-1588

In this paper we investigate the application of the localized method of fundamental solutions (LMFS) for solving three-dimensional inhomogeneous elliptic boundary value problems. A direct Chebyshev collocation scheme (CCS) is employed for the approximation of the particular solutions of the given inhomogeneous problem. The Gauss–Lobatto collocation points are used in the CCS to ensure the pseudo-spectral...

article

Perturbation finite element solution for chemo-elastic boundary value problems under chemical equilibrium

Peter L. Bishay, Jan Sladek, Nicholas Fabry, Vladimir Sladek, more

Acta Mechanica Sinica > 2019 > 35 > 5 > 981-991

Modeling the elastic behavior of solids in energy conversion and storage devices such as fuel cells and lithium-ion batteries is usually difficult because of the nonlinear characteristics and the coupled chemo-mechanical behavior of these solids. In this work, a perturbation finite element (FE) formulation is developed to analyze chemo-elastic boundary value problems (BVPs) under chemical equilibrium...

article

A combined scheme of generalized finite difference method and Krylov deferred correction technique for highly accurate solution of transient heat conduction problems

Wenzhen Qu, Yan Gu, Yaoming Zhang, Chia‐Ming Fan, more

International Journal for Numerical Methods in Engineering > 117 > 1 > 63 - 83

This paper presents a numerical framework for the highly accurate solutions of transient heat conduction problems. The numerical framework discretizes the temporal direction of the problems by introducing the Krylov deferred correction (KDC) approach, which is arbitrarily high order of accuracy while remaining the computational complexity same as in the time‐marching of first‐order methods. The discretization...

article

Effects of electric field and strain gradients on cracks in piezoelectric solids

Jan Sladek, Vladimir Sladek, Michael Wünsche, Chuanzeng Zhang

European Journal of Mechanics - A/Solids > 2018 > 71 > C > 187-198

The paper presents a general approach to analyze 2-D crack problems where the electric field and displacement gradients exhibit a size effect. The finite element method (FEM) is developed to analyze the general 2D boundary value problems in size-dependent piezoelectric solids with cracks if the electric field gradients are considered in the constitutive equations for the electric displacements. The...

article

A BEM for band structure and elastic wave transmission analysis of 2D phononic crystals with different interface conditions

Feng-Lian Li, Yue-Sheng Wang, Chuanzeng Zhang

International Journal of Mechanical Sciences > 2018 > 144 > C > 110-117

In this paper, a boundary element method (BEM) is developed and applied to compute the band structures and the elastic wave transmission of 2D phononic crystals which have different interface conditions between the scatterers and the matrix. The 2D phononic crystals consist of circular or square solid cylinders periodically embedded in a solid matrix forming a square lattice. For a periodic unit-cell,...

article

Free vibration analysis of multi-span Timoshenko beams using the assumed mode method

Zhao Zhao, Shurui Wen, Fengming Li, Chuanzeng Zhang

Archive of Applied Mechanics > 2018 > 88 > 7 > 1213-1228

Although some investigations on the vibration properties of multi-span beams have been conducted, studies on multi-span Timoshenko beams by using the assumed mode method have been relatively few. In this paper, the multi-span Timoshenko beams are investigated, and the mode shapes of the beams are modified by the interpolation functions to model the vibration modes of the multi-span beams. Hamilton’s...

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BOUNDARY ELEMENT METHOD (18)
PHONONIC CRYSTALS (17)
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RADIAL BASIS FUNCTIONS (4)
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X-FEM (4)
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BANDGAPS (3)
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MESHFREE METHOD (3)
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FUNCTIONALLY GRADED INTERLAYERS (2)
FUNCTIONALLY GRADED PIEZOELECTRIC MATERIALS (2)
GREEN'S FUNCTION (2)
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LIFE-PREDICTION MODEL (2)
LOCAL BOUNDARY INTEGRAL EQUATIONS (2)
MATRIX-EXPONENTIAL DECOMPOSITION (2)
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INFONA - science communication portal

Search results for: Chuanzeng Zhang

Frequency‐domain fundamental solutions and boundary element method for consistent couple stress elastodynamic problems

Development of a FEM tool to calculate the dispersion curves of 2D phononic structures

Reanalysis of structures with varying cross‐sectional values based on influence functions

Topological electromagnetic and elastic states in phoxonic crystal cavity arrays

A Chebyshev collocation method for band structure calculations of the longitudinal elastic waves in phononic crystals

Numerical analysis of wave mixing in 3‐D infinite elastic solids with a spherical damage

Determination of the sound insulation property of 2D periodic wall structures by a fluid‐structure interaction model

Influence of the geometric nonlinearity on the wave propagation properties of periodic lattice frame structures

Magnetically Controllable Piezotronic Responses in a Composite Semiconductor Fiber with Multiferroic Coupling Effects

Magnetically Controllable Piezotronic Responses in a Composite Semiconductor Fiber with Multiferroic Coupling Effects

Analysis of acoustic wave propagation in composite laminates via a spectral element method

Numerical study of nonlinear elastic wave propagation in locally damaged engineering structures

SH wave generated Lamb wave in a plate with a localized region of material nonlinearity

Tuning of vibration and wave propagation characteristics in pre‐deformed periodic lattice frame structures

Localized method of fundamental solutions for three-dimensional inhomogeneous elliptic problems: theory and MATLAB code

Perturbation finite element solution for chemo-elastic boundary value problems under chemical equilibrium

A combined scheme of generalized finite difference method and Krylov deferred correction technique for highly accurate solution of transient heat conduction problems

Effects of electric field and strain gradients on cracks in piezoelectric solids

A BEM for band structure and elastic wave transmission analysis of 2D phononic crystals with different interface conditions

Free vibration analysis of multi-span Timoshenko beams using the assumed mode method

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