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Thermo-elastic extended meshfree method for fracture without crack tip enrichment

A. ASADPOUR

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 441-447 doi: 10.1007/s11709-015-0319-5

Abstract: This is the first manuscript presenting an extended meshfree method for thermo- elastic fracture which

Keywords: meshfree method     thermo-elasticity    

Empirical models and design codes in prediction of modulus of elasticity of concrete

Behnam VAKHSHOURI, Shami NEJADI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 38-48 doi: 10.1007/s11709-018-0479-1

Abstract: Modulus of Elasticity (MOE) is a key parameter in reinforced concrete design.

Keywords: modulus of elasticity     normal strength normal weight concrete     empirical models     design codes     compressive    

Yue’s solution of classical elasticity in

Zhong-qi Quentin YUE

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 3,   Pages 215-249 doi: 10.1007/s11709-015-0298-6

Abstract: The mathematical theory of linear elasticity is one of the most classical field theories in mechanicsFor more than 150 years from 1838 to present, one of the remaining key tasks in classical elasticityThe boundary-value problems of classical elasticity in -layered and graded solids are also one of theIn particular, he has derived the exact and complete fundamental singular solutions for elasticity ofverification of the solutions and further applications for exact and complete solutions of other problems in elasticity

Keywords: elasticity     solution     layered solid     graded material    

Isogeometric analysis of coupled thermo-elastodynamic problems under cyclic thermal shock

Asghar AMANI DASHLEJEH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 397-405 doi: 10.1007/s11709-018-0473-7

Abstract: The isogeometric analysis (IGA) method was extended for the solution of the coupled thermo-elastodynamic

Keywords: isogeometric analysis     coupled thermo-elastodynamic     dynamic analysis     generalized newmark     cyclic thermal    

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: Thermo-active diaphragm walls have a large potential to remedy one of these problems, since they arethis paper, a series of detailed finite element analyses are carried out to capture the fully coupled thermo-hydro-mechanical

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

Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1520-1530 doi: 10.1007/s11709-020-0672-x

Abstract: In this study, for the first time, we investigate the nonlocality superimposed to the size effects on the nonlinear dynamics of an electrically actuated single-walled carbon-nanotube-based resonator. We undertake two models to capture the nanostructure nonlocal size effects: the strain and the velocity gradient theories. We use a reduced-order model based on the differential quadrature method (DQM) to discretize the governing nonlinear equation of motion and acquire a discretized-parameter nonlinear model of the system. The structural nonlinear behavior of the system assuming both strain and velocity gradient theories is investigated using the discretized model. The results suggest that nonlocal and size effects should not be neglected because they improve the prediction of corresponding dynamic amplitudes and, most importantly, the critical resonant frequencies of such nanoresonators. Neglecting these effects may impose a considerable source of error, which can be amended using more accurate modeling techniques.

Keywords: velocity gradient elasticity theory     nanotube resonators     differential-quadrature method     nonlinear vibration    

Free vibration analysis of functionally graded porous curved nanobeams on elastic foundation in hygro–thermo–magnetic

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 584-605 doi: 10.1007/s11709-023-0916-7

Abstract: equation of a functionally graded porous (FGP) curved nanobeam on an elastic foundation in a hygro–thermo–magnetic, first-order shear deformation theory, and higher-order shear deformation theory, and the nonlocal elasticity

Keywords: functionally graded porous material     curved nanobeam     hygro–thermo–magnetic     enriched finite element    

Simulation and experimental improvement on a small-scale Stirling thermo-acoustic engine

Mao CHEN,Yonglin JU

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 37-45 doi: 10.1007/s11708-015-0390-6

Abstract: Compared with the traditional engines, the thermo-acoustic engines are relatively new and can act asIn this paper, the influence of the dimensions of the main parts of the small-scale Stirling thermo-acousticBased on the numerical simulation, a small-scale Stirling thermo-acoustic engine were constructed and

Keywords: thermo-acoustic Stirling engine     small-scale     simulation     experiment    

Thermo-mechanical simulation of frost heave in saturated soils

Frontiers of Structural and Civil Engineering   Pages 1400-1412 doi: 10.1007/s11709-023-0990-x

Abstract: This paper presents the use of a coupled thermo-mechanical approach to simulate frost heave in saturatedThe results of the simulations indicate that the thermo-mechanical model captures various processes involved

Keywords: frost heave     multiphysics analysis     thermo-mechanical approach     saturated soils    

An extended thermo-mechanically coupled algorithm for simulation of superelasticity and shape memory

S. HASHEMI,H. AHMADIAN,S. MOHAMMADI

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 4,   Pages 466-477 doi: 10.1007/s11709-015-0300-3

Abstract: Thermo-mechanical coupling in shape memory alloys is a very complicated phenomenon.A two-dimensional thermo-mechanically coupled algorithm is proposed based on the original model of Lagoudas

Keywords: shape memory alloy     thermo-mechanical coupling     superplasticity     shape memory effect    

Nano thermo-hydrodynamics method for investigating cell membrane fluidity

YANG Yang, LIU Jing

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 121-128 doi: 10.1007/s11708-008-0033-2

Abstract: As a barrier to compartmentalize cells, membranes form the interface between a cell and its surroundings. The essential function of a membrane is to maintain a relatively stable environment in the cell, exchange substances selectively and transfer energy and information continually from the outside. It is intriguing that above the phase transition temperature, the membrane lipid molecule will have three modes–lateral diffusion, rotational movement and flip-flop activity. These thermodynamic processes are vital to cell existence, growth, division, differentiation and are also responsible for hundreds of thousands of phenomena in life. Previously, species transport across the membrane was interpreted mainly from a phenomenological view using a lumped system model. Therefore, detailed flow processes occurred in the membrane domain and clues related to life mechanism were not sufficiently tackled. Such important issues can be clarified by modeling nano scale thermal hydrodynamics over the gap space of a cell membrane. Previously observed complex membrane behaviors will be shown in this paper and explained by the thermally induced fluidic convections inside the membrane. A correlation between nano scale hydrodynamics, non-equilibrium thermodynamics and cell membrane activities is set up. The disclosed mechanisms are expected to provide a new viewpoint on the interaction between intracellular and extracellular processes through the membrane.

Keywords: responsible     phenomenological     phenomena     modes–lateral diffusion     differentiation    

Real time monitoring for analysis of dam stability: Potential of nonlinear elasticity and nonlinear dynamics

T. CHELIDZE, T. MATCHARASHVILI, V. ABASHIDZE, M. KALABEGISHVILI, N. ZHUKOVA

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 188-205 doi: 10.1007/s11709-013-0199-5

Abstract: Large dams are complex structures with nonlinear dynamic behavior. Engineers often are forced to assess dam safety based on the available incomplete data, which is extremely difficult. This important problem can be solved with the modern theory of complex systems. It is possible to derive characteristics of the whole unknown dynamics of a structure using few data sets of certain carefully selected representative parameter(s). By means of high quality continuous records of some geotechnical characteristic(s) of a dam and modern methods of time series linear/nonlinear analysis the main dynamical features of the entire, unknown process (here—dam deformation) can be analyzed. ?We created the cost-effective Monitoring Telemetric System for Dam Diagnostics (DAMWATCH), which consists of sensors (tiltmeters), terminal and central controllers connected by the GSM/GPRS Modem to the diagnostic center. The tilt data recorded for varying reservoir level are compared with static design model of dam deformations computed by a finite element method (FEM) for the dam-reservoir-foundation system. Besides, recently developed linear/nonlinear data analysis and prediction schemes may help to quantify fine dynamical features of the dam behavior. The software package DAMTOOL has been developed for this purpose. ?The differences between measured and theoretically predicted response parameters of the dam may signal abnormal behavior of the object. The data obtained already by testing of the DAMWATCH/DAMTOOL system during operation of the high Enguri arc dam and reservoir (Georgia) show interesting long-term and short-term patterns of tilts in the dam body, which can be used for dam diagnostics. The proposed real-time telemetric monitoring (DAMWATCH) complex and linear/nonlinear dynamical analysis system (DAMTOOL) are unique.

Keywords: real time monitoring     telemetry     dam tilts     diagnostic tools     hysteresis     nonlinear dynamics    

Axisymmetric loading on nanoscale multilayered media

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 152-164 doi: 10.1007/s11709-022-0895-0

Abstract: A Gurtin–Murdoch continuum model of surface elasticity is implemented to establish a computational scheme

Keywords: functionally graded layer     Gurtin–Murdoch surface elasticity     multilayered medium     size dependency     stiffness    

Effect of graphene and its derivatives on thermo-mechanical properties of phase change materials and

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 150-186 doi: 10.1007/s11708-021-0795-3

Abstract: improve the thermal conductivity and shape stability, which may be attributed to the extra ordinary thermo-physical

Keywords: phase change materials (PCMs)     graphene     thermal conductivity     characterization    

Thermo-economic analysis of a direct supercritical CO electric power generation system using geothermal

Frontiers in Energy 2022, Volume 16, Issue 2,   Pages 246-262 doi: 10.1007/s11708-021-0749-9

Abstract: A comprehensive thermo-economic model combining a geothermal heat mining system and a direct supercriticalAssisted by this integrated model, thermo-economic and optimization analyses for the key design parameters

Keywords: geothermal heat mining     supercritical CO2     power generation     thermo-economic analysis     optimization    

Title Author Date Type Operation

Thermo-elastic extended meshfree method for fracture without crack tip enrichment

A. ASADPOUR

Journal Article

Empirical models and design codes in prediction of modulus of elasticity of concrete

Behnam VAKHSHOURI, Shami NEJADI

Journal Article

Yue’s solution of classical elasticity in

Zhong-qi Quentin YUE

Journal Article

Isogeometric analysis of coupled thermo-elastodynamic problems under cyclic thermal shock

Asghar AMANI DASHLEJEH

Journal Article

Finite element modeling of thermo-active diaphragm walls

Yi RUI, Mei YIN

Journal Article

Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators

Hamid M. SEDIGHI, Hassen M. OUAKAD

Journal Article

Free vibration analysis of functionally graded porous curved nanobeams on elastic foundation in hygro–thermo–magnetic

Journal Article

Simulation and experimental improvement on a small-scale Stirling thermo-acoustic engine

Mao CHEN,Yonglin JU

Journal Article

Thermo-mechanical simulation of frost heave in saturated soils

Journal Article

An extended thermo-mechanically coupled algorithm for simulation of superelasticity and shape memory

S. HASHEMI,H. AHMADIAN,S. MOHAMMADI

Journal Article

Nano thermo-hydrodynamics method for investigating cell membrane fluidity

YANG Yang, LIU Jing

Journal Article

Real time monitoring for analysis of dam stability: Potential of nonlinear elasticity and nonlinear dynamics

T. CHELIDZE, T. MATCHARASHVILI, V. ABASHIDZE, M. KALABEGISHVILI, N. ZHUKOVA

Journal Article

Axisymmetric loading on nanoscale multilayered media

Journal Article

Effect of graphene and its derivatives on thermo-mechanical properties of phase change materials and

Journal Article

Thermo-economic analysis of a direct supercritical CO electric power generation system using geothermal

Journal Article