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Nonlinear analysis and reliability of metallic truss structures

Karim BENYAHI, Youcef BOUAFIA, Salma BARBOURA, Mohand Said KACHI

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 577-593 doi: 10.1007/s11709-017-0458-y

Abstract: The objective is to show how a reliability-evaluation brought by a mechanical sizing can be obtained.For that purpose, it is necessary to have a mechanical model and a reliability model representing correctlyIt is a question on one hand, to propose a formulation for the nonlinear calculation (mechanical nonlinearity

Keywords： modeling     nonlinearity mechanical     truss     probability     reliability     response surface     probability of failure    

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Nanopositioning and Nonlinearity Compensation for Step Imprint Lithography Tool

LU Bing-heng, LIU Hong-zhong, DING Yu-cheng, WANG Li, QIU Zhi-hui

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 6-13 doi: 10.1007/s11465-005-0003-x

Abstract: To avoid and eliminate these nonlinearity errors, radial basis function proportional integral derivativeDriving experiments of different motion ranges prove that this nonlinearity compensation is very effective

Keywords： different     nonoscillatory     nonlinearity     integral derivative     positioning    

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Contribution of black carbon to nonlinearity of sorption and desorption of acetochlor on sediment

Jianqiu LIU, Yaobin ZHANG, Hong CHEN, Yazhi ZHAO, Xie QUAN

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 1,   Pages 69-74 doi: 10.1007/s11783-008-0076-y

Abstract: In order to investigate the contribution of various black carbon (BC) contents to nonlinearity of sorptioncontent in the sediment would result in shifting the sorption-desorption isotherms from linearity to nonlinearity

Keywords： black carbon (BC)     sorption     desorption     sediment    

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Finite element analysis of creep for plane steel frames in fire

Hui ZHU, Yuching WU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 297-307 doi: 10.1007/s11709-012-0162-x

Abstract: The geometric nonlinearity, material nonlinearity, high temperature creep, and temperature rate of change

Keywords： creep     plane steel frame     fire     finite element method     geometric nonlinearity    

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A bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-023-0747-1

Abstract: However, attention has been rarely given on the influences of external mechanical and internal electricalIn this work, a bionic swallow structure design norm was developed for mechanical decoupling, and theinfluences of structural parameters on mechanical behavior were fully analyzed and optimized.High immunity to mechanical disturbances was maintained simultaneously, i.e., less than 0.369% and 0.058%

Keywords： micro-electro-mechanical system capacitive sensor     bionics     operation instability     mechanical and electrical    

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Optimal dome design considering member-related design constraints

Tugrul TALASLIOGLU

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1150-1170 doi: 10.1007/s11709-019-0543-5

Abstract: This study proposes to optimize the design of geometrically nonlinear dome structures. A new Multi-objective Optimization Algorithm named Pareto Archived Genetic Algorithm (PAGA), which has an ability of integrating the nonlinear structural analysis with the provisions of American Petroleum Institute specification is employed to optimize the design of ellipse and sphere-shaped dome configurations. Thus, it is possible to investigate how the qualities of optimal designations vary considering the shape, size, and topology-related design variables. Furthermore, the computing efficiency of PAGA is evaluated considering six multi-objective optimization algorithms and eight quality measuring indicators. It is shown that PAGA has a capability of both exploring an increased number of pareto solutions and predicting a pareto front with a higher convergence degree. Moreover, the inclusion of shape-related design variables leads to a decrease in both the weights of dome structures and their load-carrying capacities. However, the designer easily determines the most requested optimal design through the archiving feature of PAGA. Thus, it is also demonstrated that the proposed optimal design procedure increases the correctness degree in the evaluation of optimal dome designs through the tradeoff analysis. Consequently, PAGA is recommended as an optimization tool for the design optimization of geometrically nonlinear dome structures.

Keywords： dome structure     geometric nonlinearity     multi-objective optimization     API RP2A-LRFD    

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Determination of mechanical parameters for elements in meso-mechanical models of concrete

Xianglin GU, Junyu JIA, Zhuolin WANG, Li HONG, Feng LIN

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 391-401 doi: 10.1007/s11709-013-0225-7

Abstract: based on the discrete element method with the modified-rigid-body-spring concrete model, in which the mechanicalpredicted by the Carpinteri and Weibull size effects laws, a series of formulas to convert the macro-scale mechanical

Keywords： concrete     meso-mechanical model     discrete element method     size effect     mechanical parameter    

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Facile synthesis of polyaniline nanorods to simultaneously enhance the mechanical properties and wear

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1254-1266 doi: 10.1007/s11705-023-2297-3

Abstract: To enhance the mechanical properties and wear resistance of epoxy resin, polyaniline nanorods were firstthe phase structures and compositions of polyaniline nanorods, and their positive influences on the mechanical

Keywords： epoxy resin     polyaniline nanorods     mechanical property     tribological performance     wear mechanism    

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Shape optimization of aluminium alloy spherical reticulated shells considering nonlinearities

Wei LIU; Lishu XU; Shaojun ZHU; Lijuan LI; Feng LIU; Zhe XIONG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1565-1580 doi: 10.1007/s11709-022-0867-4

Abstract: To explore the effect of material nonlinearity, the optimal shapes obtained based on considering and

Keywords： shape optimization     aluminum alloy     spherical reticulated shell     non-linear buckling     material nonlinearity    

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Implementation of total Lagrangian formulation for the elasto-plastic analysis of plane steel frames exposed to fire

Bing XIA, Yuching WU, Zhanfei HUANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 257-266 doi: 10.1007/s11709-012-0163-9

Abstract: In this paper, the co-rotational total Lagrangian forms of finite element formulations are derived to perform elasto-plastic analysis for plane steel frames that either experience increasing external loading at ambient temperature or constant external loading at elevated temperatures. Geometric nonlinearities and thermal-expansion effects are considered. A series of programs were developed based on these formulations. To verify the accuracy and efficiency of the nonlinear finite element programs, numerical benchmark tests were performed, and the results from these tests are in a good agreement with the literature. The effects of the nonlinear terms of the stiffness matrices on the computational results were investigated in detail. It was also demonstrated that the influence of geometric nonlinearities on the incremental steps of the finite element analysis for plane steel frames in the presence of fire is limited.

Keywords： co-rotational     total Lagrangian     geometrical nonlinearity     fire     elasto-plastic    

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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: The study of frost heave requires conducting a multiphysics analysis, considering the thermal, mechanicalThis paper presents the use of a coupled thermo-mechanical approach to simulate frost heave in saturatedA function predicting porosity evolution is implemented to couple the thermal and mechanical field analysesThe results of the simulations indicate that the thermo-mechanical model captures various processes involved

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

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Experimental and numerical study on microcrack detection using contact nonlinear acoustics

Xiaojia CHEN, Yuanlin WANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 137-141 doi: 10.1007/s11709-009-0028-z

Abstract: a non-classical nonlinear acoustic theory for microcrack detection in materials, comparing contact nonlinearitywith material nonlinearity.

Keywords： microcrack detection     contact nonlinearity     numerical analysis    

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Electronic and mechanical responses of two-dimensional HfS

Mohammad SALAVATI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 486-494 doi: 10.1007/s11709-018-0491-5

Abstract: We accordingly conducted first-principles calculations to explore the mechanical and electronic responses

Keywords： 2D materials     mechanical     electronic     DFT    

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Experimental study on compaction-induced anisotropic mechanical property of rockfill material

Xiangtao ZHANG, Yizhao GAO, Yuan WANG, Yu-zhen YU, Xun SUN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 109-123 doi: 10.1007/s11709-021-0693-0

Abstract: The anisotropy of rockfill materials has a significant influence on the performance of engineering structures. However, relevant research data are very limited, because of the difficulty with preparing specimens with different inclination angles using traditional methods. Furthermore, the anisotropy test of rockfill materials is complex and complicated, especially for triaxial tests, in which the major principal stress plane intersects with the compaction plane at different angles. In this study, the geometric characteristics of a typical particle fraction consisting of a specific rockfill material were statistically investigated, and the distribution characteristics of particle orientation in specimens prepared via different compaction methods were examined. For high-density rockfill materials, a set of specimen preparation devices for inclined compaction planes was developed, and a series of conventional triaxial compression tests with different principal stress direction angles were conducted. The results reveal that the principal stress direction angle has a significant effect on the modulus, shear strength, and dilatancy of the compacted rockfill materials. Analysis of the relationship between the principal stress direction angles, change in the stress state, and change in the corresponding dominant shear plane shows that the angle between the compacted surface and dominant shear plane is closely related to interlocking resistance associated with the particle orientation. In addition, different principal stress direction angles can change the extent of the particle interlocking effect, causing the specimen to exhibit different degrees of anisotropy.

Keywords： rockfill     inclination of specimen preparation     anisotropy     mechanical property     mechanism    

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Three-dimensional composite Li metal anode by simple mechanical modification for high-energy batteries

Frontiers in Energy 2023, Volume 17, Issue 5,   Pages 569-584 doi: 10.1007/s11708-023-0875-7

Abstract: Under this condition, a novel method to construct 3D composite anode via simple mechanical modificationIn this mini review, a systematic and in-depth investigation of this mechanical deformation techniqueFirst, by summarizing a number of recent studies, different mechanical modification approaches are classifiedThen, the effect of each individual mechanical modification approach and its working mechanisms is reviewed

Keywords： lithium (Li)-ion battery (LIB)     Li metal battery     three-dimensional (3D) composite Li metal anode     mechanical    

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Title Author Date Type Operation

Nonlinear analysis and reliability of metallic truss structures

Karim BENYAHI, Youcef BOUAFIA, Salma BARBOURA, Mohand Said KACHI

Journal Article

Nanopositioning and Nonlinearity Compensation for Step Imprint Lithography Tool

LU Bing-heng, LIU Hong-zhong, DING Yu-cheng, WANG Li, QIU Zhi-hui

Journal Article

Contribution of black carbon to nonlinearity of sorption and desorption of acetochlor on sediment

Jianqiu LIU, Yaobin ZHANG, Hong CHEN, Yazhi ZHAO, Xie QUAN

Journal Article

Finite element analysis of creep for plane steel frames in fire

Hui ZHU, Yuching WU

Journal Article

A bionic approach for the mechanical and electrical decoupling of an MEMS capacitive sensor in ultralow

Journal Article

Optimal dome design considering member-related design constraints

Tugrul TALASLIOGLU

Journal Article

Determination of mechanical parameters for elements in meso-mechanical models of concrete

Xianglin GU, Junyu JIA, Zhuolin WANG, Li HONG, Feng LIN

Journal Article

Facile synthesis of polyaniline nanorods to simultaneously enhance the mechanical properties and wear

Journal Article

Shape optimization of aluminium alloy spherical reticulated shells considering nonlinearities

Wei LIU; Lishu XU; Shaojun ZHU; Lijuan LI; Feng LIU; Zhe XIONG

Journal Article

Implementation of total Lagrangian formulation for the elasto-plastic analysis of plane steel frames exposed to fire

Bing XIA, Yuching WU, Zhanfei HUANG

Journal Article

Thermo-mechanical simulation of frost heave in saturated soils

Journal Article

Experimental and numerical study on microcrack detection using contact nonlinear acoustics

Xiaojia CHEN, Yuanlin WANG

Journal Article

Electronic and mechanical responses of two-dimensional HfS

Mohammad SALAVATI

Journal Article

Experimental study on compaction-induced anisotropic mechanical property of rockfill material

Xiangtao ZHANG, Yizhao GAO, Yuan WANG, Yu-zhen YU, Xun SUN

Journal Article

Three-dimensional composite Li metal anode by simple mechanical modification for high-energy batteries

Journal Article