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Modelling autogenous expansion for magnesia concrete in arch dams

JIN Feng, LUO Xiaoqing, ZHANG Chuhan, ZHANG Guoxin

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3, Pages 211-218 doi: 10.1007/s11709-008-0025-7

Abstract: The model is verified by some experimental data of autogenous expansion of Magnesia Concrete and field-measured

Keywords： field-measured irreversibility temperature irreversible element arch

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Solubility of CO in solid-state PET measured by pressure-decay method

CHEN Miaocan, ZHAO Ling, LIU Tao, WU Jiangwei, YUAN Weikang

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2, Pages 214-219 doi: 10.1007/s11705-008-0040-1

Abstract: The solubility of CO in solid-state PET was measured using a pressure-decay method.PET, the crystallinity of solid state PET dissolved in CO at different pressures and temperatures was measured

Keywords： Sanchez-Lacombe equation solid-state PET different relationship calorimetry

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Recent progress in electric-field assisted combustion: a brief review

Frontiers in Energy 2022, Volume 16, Issue 6, Pages 883-899 doi: 10.1007/s11708-021-0770-z

Abstract: Among the combustion technologies, electric-field assisted combustion is an advanced techno-logy thatIn the last two decades, tremendous efforts have been made to understand electric-field assisted combustionThese findings significantly facilitate the application of electric-field assisted combustion.

Keywords： electric field combustion flame stabilization emission reduction flame propagation

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A MATLAB code for the material-field series-expansion topology optimization method

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3, Pages 607-622 doi: 10.1007/s11465-021-0637-3

Abstract: This paper presents a MATLAB implementation of the material-field series-expansion (MFSE) topo-logy optimizationThe MFSE method uses a bounded material field with specified spatial correlation to represent the structuralWith the series-expansion method for bounded fields, this material field is described with the characteristic

Keywords： MATLAB implementation topology optimization material-field series-expansion method bounded materialfield dimensionality reduction

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Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2, Pages 158-164 doi: 10.1007/s11709-009-0002-9

Abstract: A field test was conducted to investigate the distribution of temperature field and the variation ofAccording to field tests, the thermal stress incurred by hydration heat may induce temperature cracks

Keywords： box-girder bridge field test hydration heat temperature field temperature gradient thermal stress

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Energy field-assisted high-speed dry milling green machining technology for difficult-to-machine metal

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0744-9

Abstract: Energy field-assisted machining technology has the potential to overcome the limitations of machiningThe introduction of advanced energy-field-assisted green processing technology can improve the machinabilityThe laser energy field, ultrasonic energy field, and cryogenic minimum quantity lubrication energy fieldsBy analyzing the effects of changing the energy field and cutting parameters on tool wear, chip morphologyFinally, the shortcomings and technical challenges of energy-field-assisted milling are summarized in

Keywords： difficult-to-machine metal material green machining high-speed dry milling laser energy field-assistedmilling ultrasonic energy field-assisted milling cryogenic minimum quantity lubrication energy field-assisted

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Temperature field simulation of laser homogenizing equipment

Juanjuan WANG, Yunshan WANG, Fudong ZHU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1, Pages 49-52 doi: 10.1007/s11465-009-0005-1

Abstract: The scanning ring facula’s mathematic model is established based on the temperature field’s superposingdistribution and temperature distribution characteristics are achieved by simulating its temperature fieldBy studying the effect of parameters on the temperature field, the best parameter can be found.

Keywords： laser homogenizing technology laser scanning ring facula temperature field

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Sulige Gas Field super project

Wenrui HU, Jingwei BAO, Pengcheng JI

Frontiers of Engineering Management 2017, Volume 4, Issue 3, Pages 379-384 doi: 10.15302/J-FEM-2017107

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A FEniCS implementation of the phase field method for quasi-static brittle fracture

HIRSHIKESH, Sundararajan NATARAJAN, Ratna Kumar ANNABATTULA

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2, Pages 380-396 doi: 10.1007/s11709-018-0471-9

Abstract: In the recent years, the phase field method for simulating fracture problems has received considerableThe present work discusses the implementation of the phase field method for brittle fracture within the

Keywords： phase field method FEniCS brittle fracture crack propagation variational theory of fracture

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Centrifuge model test and field measurement analysis for foundation pit with confined water

Chunlin DING , Xiaohong MENG ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3, Pages 299-304 doi: 10.1007/s11709-009-0035-0

Abstract: The similarity law of centrifuge test was developed for the seepage field and stress field of a foundationFinally, a comparative study was conducted on the test results of the pit deformation and the field measurementresults show that the pit deformation regularity of the test is basically identical with that of the fieldmeasurement, and the difference in pit deformation between the test and the field measurement is within

Keywords： foundation pit with confined water centrifuge model test seepage-stress coupling field similarity relation field measurement deformation

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Nonlinear restoring force identification based on measured time series

Xu Bin,He Jia

Strategic Study of CAE 2011, Volume 13, Issue 9, Pages 76-82

Abstract:

In this study, a general nonlinear restoring force (NRF) identification approach using structural dynamic response measurements and complete excitations is proposed at first. In this approach, the least-squares technique is employed to identify the parameters of an equivalent linear system of the nonlinear structure model based on the external excitations and the corresponding response measurements. The proposed approach is developed when the structure to be identified is incompletely excited. Both of the approaches are validated with a 4-story frame structure equipped with smart devices of magneto-rheological (MR) damper to simulate nonlinear performance. The identified NRF of the structure is compared with the test measurements. Results show that the proposed data-based approaches are capable of identifying the nonlinear restoring behavior of engineering structures and have the potential to be employed to evaluate the damage initiation and development procedure of engineering structures under dynamic loads.

Keywords： nonlinear restoring force identification MR damper least-squares techniques equivalent linear system non-parametric model

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Study on the measurement of temperature field using laser holographic interferometry

Jinrong ZHU, Suyi HUANG, Wei LV, Huaichun ZHOU

Frontiers in Energy 2011, Volume 5, Issue 1, Pages 120-124 doi: 10.1007/s11708-010-0107-9

Abstract: The temperature field of an axisymmetric ethylene diffusion flame is measured using laser holographicTemperature field inversion is completed with the aid of components distribution divided from numerical

Keywords： temperature field flame error analysis holographic interferometry

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Implementation aspects of a phase-field approach for brittle fracture

G. D. HUYNH, X. ZHUANG, H. NGUYEN-XUAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2, Pages 417-428 doi: 10.1007/s11709-018-0477-3

Abstract: This paper provides a comprehensive overview of a phase-field model of fracture in solid mechanics settingstandard finite element shape functions are used for both primary fields including displacements and phase field

Keywords： phase-field modeling FEM staggered scheme fracture

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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 reciprocating movement directly without auxiliary transmission mechanisms. It 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 of linear oscillating motors has been the focus of studies and deserves further research for high power density. In this paper, a general framework of linear oscillating motor design and optimization is addressed in detail, including the electromagnetic, dynamics, and thermal aspects. First, the electromagnetic and dynamics characteristics are modeled to reveal the principle for optimization. Then, optimization and analysis on magnetic structure, resonant system, and thermal features are conducted, which provide the foundation for prototype development. Finally, experimental results are provided for validation. As a whole, this process offers complete guidance for high power density linear oscillating motors in linear pump applications.

Keywords： linear oscillating motor linear pump magnetic field motor optimization

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Near-field radiative thermoelectric energy converters: a review

Eric TERVO, Elham BAGHERISERESHKI, Zhuomin ZHANG

Frontiers in Energy 2018, Volume 12, Issue 1, Pages 5-21 doi: 10.1007/s11708-017-0517-z

Abstract: this exchange occurs at micro or nanoscale distances, power densities can be greatly enhanced and near-fieldThis review covers the fundamentals of near-field thermal radiation, photon entropy, and nonequilibriumThe development and state of the art of these near-field converters are discussed in detail, and remaining

Keywords： energy conversion systems luminescent refrigeration near-field radiation thermophotovoltaic thermoradiative