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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: tension were calculated based on the discrete element method with the modified-rigid-body-spring concrete model, in which the mechanical parameters derived from macro-scale material tests were applied directly topredicted by the Carpinteri and Weibull size effects laws, a series of formulas to convert the macro-scale mechanicalparameters of mortar and interface to those at the meso-scale were proposed through a fitting analysis

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

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Development of meso-scale milling machine tool and its performance analysis

LI Hongtao, LAI Xinmin, LI Chengfeng, LIN Zhongqin, MIAO Jiancheng, NI Jun

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 59-65 doi: 10.1007/s11465-008-0005-6

Abstract: To overcome the shortcomings of current technologies for meso-scale manufacturing such as MEMS and ultrathe process mechanism studies are investigated based on the analysis of the characteristics of the mesoThen, a meso-scale milling machine tool system is developed.positioning subsystem, the test for machining precision evaluation, and the experiments for machining mechanicaland applicable for meso manufacturing.

Keywords： applicable     machining mechanical     overview     positioning subsystem     miniaturized    

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Digital representation of meso-geomaterial spatial distribution and associated numerical analysis of

YUE Zhongqi

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 80-93 doi: 10.1007/s11709-007-0008-0

Abstract: representation of the geomaterial distribution of different minerals, particulars, and components in the meso-scaleThese meshes or grids can be easily incorporated into existing numerical software packages for further mechanicalapproach to develop the geomechanics by taking into account the geomaterial behavior at micro-scale, meso-scalein geomechanics where actual spatial distribution and properties of materials and components at the meso-level

Keywords： homogeneous     numerical analysis     Expanded     homogenization     meso-level    

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Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected

Antonio MARÍ,Antoni CLADERA,Jesús BAIRÁN,Eva OLLER,Carlos RIBAS

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 337-353 doi: 10.1007/s11709-014-0081-0

Abstract: A mechanical model recently developed for the shear strength of slender reinforced concrete beams withThe predictions of the model have been compared to those obtained by using the EC2, MC2010 and ACI 318

Keywords： shear strength     mechanical model     reinforced concrete     design     assessment     shear tests    

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Fabrication and catalytic performance of meso-ZSM-5 zeolite encapsulated ferric oxide nanoparticles for

Zhenheng Diao, Lushi Cheng, Wen Guo, Xu Hou, Pengfei Zheng, Qiuyueming Zhou

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 643-653 doi: 10.1007/s11705-020-1972-3

Abstract: An encapsulation-structured Fe O @meso-ZSM-5 (Fe@MZ5) was fabricated by confining Fe O nanoparticles(ca. 4 nm) within the ordered mesopores of hierarchical ZSM-5 zeolite (meso-ZSM-5), with ferric oleateand amphiphilic organosilane as the iron source and meso-porogen, respectively.For comparison, catalysts with Fe O (ca. 12 nm) encapsulated in intra-crystal holes of meso-ZSM-5 and

Keywords： phenol hydroxylation     encapsulation structure     structure-performance relationship     meso-ZSM-5     ferric oxide    

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A time−space porosity computational model for concrete under sulfate attack

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0985-7

Abstract: This study proposes a mechanical–chemical model to simulate the spatiotemporal distribution of the porosityIn addition, the expansion strain at the macro-scale is obtained using a stress analysis model of compositeThe results demonstrate that the expansion strains calculated using the suggested model agree well withThe proposed model can forecast and assess the porosity of concrete covers and provide a credible approach

Keywords： expansion deformation     porosity     internal expansion stress     external sulfate attack     mechanical–chemicalcoupling model    

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Effects of leakage and friction on the miniaturization of a Wankel compressor

Yilin ZHANG, Wen WANG

Frontiers in Energy 2011, Volume 5, Issue 1,   Pages 83-92 doi: 10.1007/s11708-010-0125-7

Abstract: This paper presents a numerical simulation of the performance of a meso-scale Wankel compressor and discussesrelated to the effect of leakage and friction on the design limit (cooling capacity and dimension) of the mesoThe decreasing cooling capacity of the meso Wankel compressor increases the proportion of leakage todisplacement and causes the coefficient of performance COP and the mechanical efficiency to decrease.The rational design cooling capacity limit for the meso-scale Wankel compressor is approximately 4 W.

Keywords： meso-scale     Wankel compressor     leakage     friction    

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Fault evolution-test dependency modeling for mechanical systems

Xiao-dong TAN,Jian-lu LUO,Qing LI,Bing LU,Jing QIU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 10,   Pages 848-857 doi: 10.1631/FITEE.1500011

Abstract: Tracking the process of fault growth in mechanical systems using a range of tests is important to avoidIn this paper, to improve the testability performance of mechanical systems for tracking fault growth, a fault evolution-test dependency model (FETDM) is proposed to implement DFT.considers fault trackability and predictability is developed to quantify the testability performance of mechanicaland testability analysis method can provide guidance to engineers to improve the testability level of mechanical

Keywords： Mechanical systems     Design for testability (DFT)     Fault evolution-test dependency model (FETDM)    

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Mechanical Models of Rock Burst and Its Physical & Numerical Modeling Study

Zhu Fangcai,Song Jinquan

Strategic Study of CAE 2003, Volume 5, Issue 3,   Pages 83-89

Abstract:

Concerning with status of rock burst study, some comments on rock bursting mechanical models, laboratory

Keywords： rock burst     mechanical model     numerical simulation     damage     creep    

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Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 745-762 doi: 10.1007/s11709-023-0935-4

Abstract: An analytical model based on complex variable theory is proposed to investigate ground responses dueThe present model is superior to the classical model for analyzing ground responses of shallow tunneling

Keywords： analytical model     mechanical response     multi-layered ground     shallow tunneling     ground surface load    

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Deep learning model for estimating the mechanical properties of concrete containing silica fume exposed

Harun TANYILDIZI, Abdulkadir ŞENGÜR, Yaman AKBULUT, Murat ŞAHİN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1316-1330 doi: 10.1007/s11709-020-0646-z

Abstract: In this study, the deep learning models for estimating the mechanical properties of concrete containing

Keywords： concrete     high temperature     strength properties     deep learning     stacked auto-encoders     LSTM network    

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Synthesis of micro/meso porous carbon for ultrahigh hydrogen adsorption using cross-linked polyaspartic

Jun Wei, Jianbo Zhao, Di Cai, Wenqiang Ren, Hui Cao, Tianwei Tan

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 857-867 doi: 10.1007/s11705-019-1880-6

Abstract: In addition to the specific surface area, surface topography and characteristics such as the pore size, pore size distribution, and micro/mesopores ratio are factors that determine the performance of porous carbons (PCs) in the fields of energy, catalysis, and adsorption. Based on the mechanism of weight loss of polyaspartic acid at high temperatures, this study provided a new method for adjusting the surface morphology of PCs by changing the cross-linking ratio of the precursor, where cross-linked polyaspartic acid was used as precursor without additional activating agents. N adsorption analysis indicated that the specific surface area of the obtained PCs was as high as 1458 m ·g , of which 1200 m ·g was the contribution of the microporous area and the highest pore volume was 1.13 cm ·g , of which the micropore volume was 0.636 cm ·g . The thermogravimetric analysis results of the precursor, and also the scanning electron microscopy and Brunauer–Emmet–Teller analysis results of the carbonization product confirmed that the prepared PCs presented multilevel pore structure, and the diameters of most pores were 0.78 and 3.97 nm; moreover, the pore size distribution was relatively uniform. This conferred the PCs the ultrahigh hydrogen adsorption capacity of up to 4.52 wt-% at 77 K and 1.13 bar, in addition to their great energy storage and catalytic potential.

Keywords： porous carbon     multilevel pores     polyaspartic acid     cross-linking     hydrogen adsorption    

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Mechanical behavior and semiempirical force model of aerospace aluminum alloy milling using nano biological

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0720-4

Abstract: The instantaneous milling force model of the integral end milling cutter is established under the condition

Keywords： milling     force     nanofluid minimum quantity lubrication     aerospace aluminum alloy     nano biological lubricant    

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Reconciling “Micro” and “Macro” through Meso-Science

Raffaella Ocone

Engineering 2017, Volume 3, Issue 3,   Pages 281-282 doi: 10.1016/J.ENG.2017.03.009

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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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Title Author Date Type Operation

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

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

Journal Article

Development of meso-scale milling machine tool and its performance analysis

LI Hongtao, LAI Xinmin, LI Chengfeng, LIN Zhongqin, MIAO Jiancheng, NI Jun

Journal Article

Digital representation of meso-geomaterial spatial distribution and associated numerical analysis of

YUE Zhongqi

Journal Article

Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected

Antonio MARÍ,Antoni CLADERA,Jesús BAIRÁN,Eva OLLER,Carlos RIBAS

Journal Article

Fabrication and catalytic performance of meso-ZSM-5 zeolite encapsulated ferric oxide nanoparticles for

Zhenheng Diao, Lushi Cheng, Wen Guo, Xu Hou, Pengfei Zheng, Qiuyueming Zhou

Journal Article

A time−space porosity computational model for concrete under sulfate attack

Journal Article

Effects of leakage and friction on the miniaturization of a Wankel compressor

Yilin ZHANG, Wen WANG

Journal Article

Fault evolution-test dependency modeling for mechanical systems

Xiao-dong TAN,Jian-lu LUO,Qing LI,Bing LU,Jing QIU

Journal Article

Mechanical Models of Rock Burst and Its Physical & Numerical Modeling Study

Zhu Fangcai,Song Jinquan

Journal Article

Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

Journal Article

Deep learning model for estimating the mechanical properties of concrete containing silica fume exposed

Harun TANYILDIZI, Abdulkadir ŞENGÜR, Yaman AKBULUT, Murat ŞAHİN

Journal Article

Synthesis of micro/meso porous carbon for ultrahigh hydrogen adsorption using cross-linked polyaspartic

Jun Wei, Jianbo Zhao, Di Cai, Wenqiang Ren, Hui Cao, Tianwei Tan

Journal Article

Mechanical behavior and semiempirical force model of aerospace aluminum alloy milling using nano biological

Journal Article

Reconciling “Micro” and “Macro” through Meso-Science

Raffaella Ocone

Journal Article

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

Journal Article