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Creep and recovery behaviors of magnetorheological elastomers

Weihua LI, Yang ZHOU, Tongfei TIAN, Gursel ALICI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 341-346 doi: 10.1007/s11465-010-0096-8

Abstract: The experimental results demonstrated that MREs behave as linear visocleastic properties.Moreover, a four-parameter viscoelastic model was developed to describe MRE creep behaviors.The comparison between the experimental results and the modeling predictions indicates that the model

Keywords： magneto-rheological elastomers (MREs)     creep     recovery     linear viscoelastic model    

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Linear viscoelastic behavior of asphalt binders and mixtures containing very high percentages of reclaimed

Frontiers of Structural and Civil Engineering   Pages 1211-1227 doi: 10.1007/s11709-023-0983-9

Abstract: The primary aim of this study is to correlate the impact of aggregates, if any, on the viscoelastic behaviorconstructed and Shift-Homothety-Shift in time-Shift (SHStS) transformation was used to compare the linearviscoelastic behavior of asphalt binders and mixtures.The influence of aggregates on the viscoelastic behavior of asphalt mixtures depends on temperature andThe maximum difference (60% to 70%) in the viscoelastic behavior of the binder and mixture based on SHStS

Keywords： RAP     complex modulus     SHStS transformation     rejuvenation     behavior of asphalt binder and mixture    

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An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermalnonequilibrium model

Qi WEI, Xiaohui ZHANG

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 507-516 doi: 10.1007/s11708-010-0017-x

Abstract: Thermal convection of viscoelastic fluids saturating a horizontal porous layer heated from below is analyzedusing a thermal nonequilibrium model to take account of the interphase heat transfer between the fluidThe viscoelastic character of the flow is considered by a modified Darcy’s law.The effects of interphase heat transfer on the thermal convection of viscoelastic fluids in a porous

Keywords： thermal convection     porous media     viscoelastic fluid     thermal nonequilibrium model    

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General expression for linear and nonlinear time series models

Ren HUANG, Feiyun XU, Ruwen CHEN

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 15-24 doi: 10.1007/s11465-009-0015-z

Abstract: such as ARMA, AR, and MA are founded on the normality and stationarity of a system and expressed by a lineardifference equation; therefore, they are strictly limited to the linear system.This paper proposes a general expression for linear and nonlinear auto-regressive time series modelsThe model simulation and experiments show that the GNAR model can accurately approximate to the dynamicThe proposed GNAR model is flexible and effective.

Keywords： linear and nonlinear     autoregressive model     system identification     time series analysis    

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Simulation of viscoelastic behavior of defected rock by using numerical manifold method

Feng REN, Lifeng FAN, Guowei MA

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 199-207 doi: 10.1007/s11709-011-0102-1

Abstract: Numerical simulations of longitudinal wave propagation in a rock bar with microcracks are conducted by using the numerical manifold method which has great advantages in the simulation of discontinuities. Firstly, validation of the numerical manifold method is carried out by simulations of a longitudinal stress wave propagating through intact and cracked rock bars. The behavior of the stress wave traveling in a one-dimensional rock bar with randomly distributed microcracks is subsequently studied. It is revealed that the highly defected rock bar has significant viscoelasticity to the stress wave propagation. Wave attenuation as well as time delay is affected by the length, quantity, specific stiffness of the distributed microcracks as well as the incident stress wave frequency. The storage and loss moduli of the defected rock are also affected by the microcrack properties; however, they are independent of incident stress wave frequency.

Keywords： stress wave propagation     defected rock     numerical manifold method     viscoelastic behavior     storage modulus    

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Comparison between linear and non-linear forms of pseudo-first-order and pseudo-second-order adsorption

Junxiong LIN , Lan WANG ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 320-324 doi: 10.1007/s11783-009-0030-7

Abstract: The best-fit equations of linear and non-linear forms of the two widely used kinetic models, namely pseudo-first-orderThe results show that the non-linear forms of pseudo-first-order and pseudo-second-order models weremore suitable than the linear forms for fitting the experimental data.The experimental kinetics may have been distorted by linearization of the linear kinetic equations, andIn addition, the Δ(%) method for error analysis may be better to determine the best-fitting model

Keywords： adsorption     pseudo-first order     pseudo-second order     kinetic model     linear method     non-linear method    

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Cutting CO emissions through demand side regulation: Implications from multi-regional input–output linearprogramming model

Frontiers of Engineering Management   Pages 452-461 doi: 10.1007/s42524-022-0209-1

Abstract: This study combines multi-regional input–output (MRIO) model with linear programming (LP) model to exploreThe proposed MRIO–LP model considers the inter-relationship among various sectors and

Keywords： CO2 emissions     demand side regulation     multi-regional input–output model     linear programmingmodel    

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Model reduction techniques for dynamics analysis of ultra-precision linear stage

Xuedong CHEN, Zhixin LI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 64-70 doi: 10.1007/s11465-009-0009-x

Abstract: Spring-damping elements are used to simplify the internal interaction in the proposed finite element (FE) modelof an ultra-precision linear stage., which can be generalized to the development and dynamics characteristic study of a complex system model

Keywords： dynamics analysis     air-bearing     linear stage     reduction    

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Research progress of the frozen wall thickness in deep alluvium

Shen Wei’an,Wang Jianzhou

Strategic Study of CAE 2011, Volume 13, Issue 11,   Pages 89-93

Abstract:

According to the problem of design theory laging behind engineering application, with the thickness increasing of deep alluvium for the freezing shaft-sinking engineering, the frozen wall is regarded as homogeneous and isotropic thick wall cylinder while designing and calculating, and the calculate results based on the elastic and elastic-plastic theory can't apply to the freezing shaft-sinking engineering in the future. In this paper, frozen wall thickness design theory of the present research situation and the existing problems were summarized. The radial creep displacement of heterogeneous frozen wall will reduce 25 % ~ 30 % when the homogeneous frozen wall, so the bearing capacity and deformation performance of frozen wall can befully used and the thickness of frozen wall can be reduced efficiently.

Keywords： frozen wall     deep alluvium     radial delimitation model     viscoelastic    

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Linear and nonlinear elastic analysis of closely spaced strip foundations using Pasternak model

Priyanka GHOSH, S. RAJESH, J. SAI CHAND

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 228-243 doi: 10.1007/s11709-016-0370-x

Abstract: attempt is made to determine the interaction effect of two closely spaced strip footings using Pasternak modelThe study considers small strain problem and has been performed using linear as well as nonlinear elasticThe linear elastic analysis has been carried out by deriving the equations for the interference effectof the footings in the framework of Pasternak model equation; whereas, the nonlinear elastic analysisdifference method to solve the second order nonlinear differential equation evolved from Pasternak model

Keywords： bearing capacity     linear and non-linear elasticity     foundation     interaction effect     numerical modeling     Pasternakmodel    

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Design and modeling of a free-piston engine generator

Frontiers in Energy   Pages 811-821 doi: 10.1007/s11708-022-0848-2

Abstract: In this paper, a parameter-decoupling approach is proposed to model the design of an FPEG.first divides the FPEG into three parts: a two-stroke engine, an integrated scavenging pump, and a linearA finite element model with a multi-objective genetic algorithm was adopted for its design.The finite element model results were fed back to the numerical model to update the LPMSM with increasedThe model provides a solid foundation for the manufacturing of related FPEG prototypes.

Keywords： free-piston engine generator     linear permanent magnet synchronous machine     system design     numerical model    

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Design and analysis of linear oscillating motor for linear pump application-magnetic field, dynamics

Zongxia JIAO,Tianyi WANG,Liang YAN

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 351-362 doi: 10.1007/s11465-016-0407-9

Abstract:

A linear oscillating motor is an electromagnetic actuator that can achieve short-stroke reciprocatingIt has been widely used in linear pump applications as the source of power and motion.However, because of the demand of high power density in a linear actuation system, the performance oflinear oscillating motors has been the focus of studies and deserves further research for high powerlinear pump applications.

Keywords： linear oscillating motor     linear pump     magnetic field     motor optimization    

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A maximum reliable network interdiction model with limited resources

Zhao Jia and Yu Hua

Strategic Study of CAE 2015, Volume 17, Issue 1,   Pages 137-142

Abstract:

This paper proposes a maximum reliable network interdiction model， which is to maximize the reliability， the number of paths between any given two nodes is exponential to the size of this graph， so this modelbilevel integer program by finding out the relationship between the lower level integer program and its linear

Keywords： interdiction model；k-reliability； duality； linear programming relaxation； complementary slackness    

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Microdamage study of granite under thermomechanical coupling based on the particle flow code

Frontiers of Structural and Civil Engineering   Pages 1413-1427 doi: 10.1007/s11709-023-0953-2

Abstract: In this study, an improved temperature-dependent linear parallel bond model is introduced under the frameworkthermomechanical coupling tests are then conducted to calibrate the micro-parameters of the proposed modelWith this improved model, the thermodynamic response and underlying cracking behavior of a deep-buried

Keywords： thermomechanical coupling effect     granite     improved linear parallel bond model     thermal property     particle    

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Beyond Pasteur’s Quadrant Model: A New Dynamic Model of Basic Research and its Implementation

Zhang Huiqin, Wang Xin, Wang Xu, Sun Changpu

Strategic Study of CAE 2021, Volume 23, Issue 4,   Pages 145-152 doi: 10.15302/J-SSCAE-2021.04.017

Abstract: In this study, we review the connotation and application of the linear model of innovation proposed byVannevar Bush and the Pasteur’s quadrant model proposed by Donald Stokes.basicness and useness dimensions along with a time dimension and develop a new three-dimensional dynamic modelThe development of intense lasers fits this new model well and clearly demonstrates the spiral upwardOn the basis of this new model of basic research development, we emphasize the importance of falsifiability

Keywords： basic research     research inspired by demand     Bush’s linear model of innovation     Pasteur’s quadrant model     dynamic model of basic research     falsifiability    

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Title Author Date Type Operation

Creep and recovery behaviors of magnetorheological elastomers

Weihua LI, Yang ZHOU, Tongfei TIAN, Gursel ALICI,

Journal Article

Linear viscoelastic behavior of asphalt binders and mixtures containing very high percentages of reclaimed

Journal Article

An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermalnonequilibrium model

Qi WEI, Xiaohui ZHANG

Journal Article

General expression for linear and nonlinear time series models

Ren HUANG, Feiyun XU, Ruwen CHEN

Journal Article

Simulation of viscoelastic behavior of defected rock by using numerical manifold method

Feng REN, Lifeng FAN, Guowei MA

Journal Article

Comparison between linear and non-linear forms of pseudo-first-order and pseudo-second-order adsorption

Junxiong LIN , Lan WANG ,

Journal Article

Cutting CO emissions through demand side regulation: Implications from multi-regional input–output linearprogramming model

Journal Article

Model reduction techniques for dynamics analysis of ultra-precision linear stage

Xuedong CHEN, Zhixin LI

Journal Article

Research progress of the frozen wall thickness in deep alluvium

Shen Wei’an,Wang Jianzhou

Journal Article

Linear and nonlinear elastic analysis of closely spaced strip foundations using Pasternak model

Priyanka GHOSH, S. RAJESH, J. SAI CHAND

Journal Article

Design and modeling of a free-piston engine generator

Journal Article

Design and analysis of linear oscillating motor for linear pump application-magnetic field, dynamics

Zongxia JIAO,Tianyi WANG,Liang YAN

Journal Article

A maximum reliable network interdiction model with limited resources

Zhao Jia and Yu Hua

Journal Article

Microdamage study of granite under thermomechanical coupling based on the particle flow code

Journal Article

Beyond Pasteur’s Quadrant Model: A New Dynamic Model of Basic Research and its Implementation

Zhang Huiqin, Wang Xin, Wang Xu, Sun Changpu

Journal Article