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Finite element analysis of stress concentrations and failure criteria in composite plates with circular

Abdelhak KHECHAI,Abdelouahab TATI,Abdelhamid GUETTALA

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 281-294 doi: 10.1007/s11465-014-0307-9

Abstract:

In this study, the stress concentration factors (SCF) in cross-and-angle-ply laminated composite plates as well as in isotropic plates with single circular holes subjected to uniaxial loading is studied. A quadrilateral finite element of four-node with 32 degrees of freedom at each node, previously developed for the bending and mechanical buckling of laminated composite plates, is used to evaluate the stress distribution in laminated composite plates with central circular holes. Based up on the classical plate theory, the present finite element is a combination of a linear isoparametric membrane element and a high precision rectangular Hermitian element. The numerical results obtained by the present element compare favorably with those obtained by the analytic approaches published in literature. It is observed that the obtained results are very close to the reference results, which demonstrates the accuracy of the present element. Additionally, to determine the first ply failure (FPF) of laminated plate, several failure criterions are employed. Finally, to show the effect of ratio on the failure of plates, a number of figures are given for different fiber orientation angles.

Keywords： laminated composite plates     stress concentration     geometric singularity     anisotropic effect    

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Trapezoidal Intuitionistic Fuzzy Aggregation Operator Based on Choquet Integral and Its Application to Multi-Criteria

Xi-hua Li,Xiao-hong Chen

Frontiers of Engineering Management 2015, Volume 2, Issue 3,   Pages 266-276 doi: 10.15302/J-FEM-2015048

Abstract: The Choquet integral can serve as a useful tool to aggregate interacting criteria in an uncertain environmenttrapezoidal intuitionistic fuzzy aggregation operator based on the Choquet integral is proposed for multi-criteriaintuitionistic fuzzy numbers and both the importance and the interaction information among decision-making criteriaA new multi-criteria decision-making method based on a trapezoidal intuitionistic fuzzy Choquet integral

Keywords： multi-criteria decision making     trapezoidal intuitionistic fuzzy numbers     Choquet integral     fuzzy measure    

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Concepts and implementation of strain-based criteria in design codes for steel structures

Reidar BJORHOVDE

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 210-216 doi: 10.1007/s11709-012-0165-7

Abstract: A uniaxial tension test is commonly used to determine the mechanical properties of steel, but it has no meaning for the response of the material in a structure. The test was developed as a consensus solution by producers, fabricators, designers and code writers, to have a standard by which similar materials could be compared to a common base. It does not represent the actual behavior of the steel in a structure, and was never intended to do so. To study the true behavior of the structure and how the material responds it would be better to determine the strains and deformations that will take place during actual service condition. Such characteristics reflect the real behavior, whether in the elastic or inelastic range. If stresses or forces are needed, these are easily determined by the value of the strain and the relevant material modulus, along with the type of cross section, whether elastic or inelastic. The paper addresses the properties of a range of structural steels, how these are incorporated into design standards and how the standards define deformation characteristics and demands for bolted and welded connections.

Keywords： steel     stress-strain characteristics     tension test     strain design     actual behavior     improved design codes    

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LSSVM-based approach for refining soil failure criteria and calculating safety factor of slopes

Shiguo XIAO; Shaohong LI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 871-881 doi: 10.1007/s11709-022-0863-8

Abstract: The failure criteria of practical soil mass are very complex, and have significant influence on the safety

Keywords： slope stability     safety factor     failure criterion     least square support vector machine    

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Research on Seawall Flood Defense Criteria

Lu Yongjin, ,He Yousheng,Liu Hua

Strategic Study of CAE 2005, Volume 7, Issue 12,   Pages 17-23

Abstract:

The seawall flood defense criteria both at home and abroad have been investigated and discussed.A three level criteria for seawall design is proposed, which comprehensively integrates the encounterBased on the above-mentioned criteria an optimization design scheme of risk principle for seawall is

Keywords： seawall     design criteria     wind wave     high tide     encounter probability     failure mode     risk     optimization design    

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Obesity in China: its characteristics, diagnostic criteria, and implications

Weiping Jia

Frontiers of Medicine 2015, Volume 9, Issue 2,   Pages 129-133 doi: 10.1007/s11684-015-0387-x

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Diagnostic criteria of latent autoimmune diabetes in adults (LADA): a review and reflection

Yu Liao, Yufei Xiang, Zhiguang Zhou

Frontiers of Medicine 2012, Volume 6, Issue 3,   Pages 243-247 doi: 10.1007/s11684-012-0201-y

Abstract: Although it has been reported for about 20 years, the diagnostic criteria of this disease remain controversialmetabolic parameters, genetic factors and cell immunity may also contribute to the formulation of the criteriaHere, we aim to review and discuss the diagnostic criteria of latent autoimmune diabetes in adults.

Keywords： LADA     diagnostic criteria     autoantibodies     insulin independence     age of diagnosis    

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Human health ambient water quality criteria for 13 heavy metals and health risk assessment in Taihu Lake

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-021-1475-6

Abstract:

• The concentrations of 13 heavy metals in Taihu Lake were analyzed.

Keywords： Heavy metals     Human health ambient water quality criteria     Taihu Lake     Health risk assessment     Contribution    

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Experimental research on ductile fracture criterion in metal forming

Song YU, Weiming FENG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 308-311 doi: 10.1007/s11465-011-0233-z

Abstract: can be estimated successively using both Normalized Cockcroft-latham and the Brozzo ductile fracture criteria

Keywords： ductile fracture criteria     metal forming process     material experiment     stress triaxiality    

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Consensus-reaching methods for hesitant fuzzy multiple criteria group decision making with hesitant fuzzy Article

Jie DING, Ze-shui XU, Hu-chang LIAO

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 11,   Pages 1679-1692 doi: 10.1631/FITEE.1601546

Abstract: In this paper, we develop two methods for hesitant fuzzy multiple criteria group decision making withAll the experts make their own judgments on each alternative over multiple criteria by hesitant fuzzyconsensus-reaching procedures and then propose two step-by-step algorithms for hesitant fuzzy multiple criteria

Keywords： Multiple criteria group decision making     Group consensus     Consensus-reaching process     Hesitant fuzzy    

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composite anodes with SWCNT additives for half and NCM811 full lithium ion batteries and assessment criteria

Jingning SHAN, Xiaofang YANG, Chao YAN, Yiguang JU, Lin CHEN, Fang ZHAO

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 626-635 doi: 10.1007/s11708-019-0650-y

Abstract: Finally, criteria to assess Si-containing anodes are proposed and discussed from an industrial perspective

Keywords： lithium-ion battery     Si anode     Si-graphite composite     single wall carbon nanotube (SWCNT)     NCM811    

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Analysis and research for risk assessment criteria of underground engineering

Yao Xuande,Wang Mengshu

Strategic Study of CAE 2009, Volume 11, Issue 7,   Pages 86-91

Abstract:

In this paper, the characteristics of underground works and constructive guidelines for risk assessment of underground works were intro.The results of the research were successfully applied to the study of the Beijing Municipal City Planning and Design of the underground road system.

Keywords： underground engineering     risk assessment     criteria    

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Success criteria of large scale construction project based on system thinking

WangJin,Xu Yujie

Strategic Study of CAE 2008, Volume 10, Issue 12,   Pages 79-85

Abstract:

In this paper, the system thinking is introduced. And four basic evaluation principles which are benefit, participation, fairness and sustainability are determined. Besides, it sets up the synthetically three-dimensional appraise model considering the benefit request of the different stakeholders. And it gives a comprehensive evaluation of the large scale project success from three perspectives of the target fulfilling degree, the triple bottom line performance and the whole life cycle.

Keywords： large scale construction project     system thinking     triple bottom line     success criteria    

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Machine Perfusion Plus for Extended Criteria Donor Liver Grafts: Making Every Liver Count Review

Zhoucheng Wang, Jack Martin, Jiongjie Yu, Kai Wang, Kourosh Saeb-Parsy, Xiao Xu

Engineering 2024, Volume 32, Issue 1,   Pages 30-41 doi: 10.1016/j.eng.2023.11.003

Abstract: Extended criteria donor (ECD) liver grafts are increasingly utilized in clinical practice to mitigate

Keywords： Liver transplantation     Extended criteria donor     Machine perfusion plus     Organ shortage    

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TODIM and TOPSIS with Z-numbers None

Renato A. KROHLING, André G. C. PACHECO, Guilherme A. dos SANTOS

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 2,   Pages 283-291 doi: 10.1631/FITEE.1700434

Abstract:

In this paper, we present an approach that can handle Z-numbers in the context of multi-criteria decision-making

Keywords： Multi-criteria decision-making     TODIM     TOPSIS     Fuzzy number     Z-number    

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Title Author Date Type Operation

Finite element analysis of stress concentrations and failure criteria in composite plates with circular

Abdelhak KHECHAI,Abdelouahab TATI,Abdelhamid GUETTALA

Journal Article

Trapezoidal Intuitionistic Fuzzy Aggregation Operator Based on Choquet Integral and Its Application to Multi-Criteria

Xi-hua Li,Xiao-hong Chen

Journal Article

Concepts and implementation of strain-based criteria in design codes for steel structures

Reidar BJORHOVDE

Journal Article

LSSVM-based approach for refining soil failure criteria and calculating safety factor of slopes

Shiguo XIAO; Shaohong LI

Journal Article

Research on Seawall Flood Defense Criteria

Lu Yongjin, ,He Yousheng,Liu Hua

Journal Article

Obesity in China: its characteristics, diagnostic criteria, and implications

Weiping Jia

Journal Article

Diagnostic criteria of latent autoimmune diabetes in adults (LADA): a review and reflection

Yu Liao, Yufei Xiang, Zhiguang Zhou

Journal Article

Human health ambient water quality criteria for 13 heavy metals and health risk assessment in Taihu Lake

Journal Article

Experimental research on ductile fracture criterion in metal forming

Song YU, Weiming FENG

Journal Article

Consensus-reaching methods for hesitant fuzzy multiple criteria group decision making with hesitant fuzzy

Jie DING, Ze-shui XU, Hu-chang LIAO

Journal Article

composite anodes with SWCNT additives for half and NCM811 full lithium ion batteries and assessment criteria

Jingning SHAN, Xiaofang YANG, Chao YAN, Yiguang JU, Lin CHEN, Fang ZHAO

Journal Article

Analysis and research for risk assessment criteria of underground engineering

Yao Xuande,Wang Mengshu

Journal Article

Success criteria of large scale construction project based on system thinking

WangJin,Xu Yujie

Journal Article

Machine Perfusion Plus for Extended Criteria Donor Liver Grafts: Making Every Liver Count

Zhoucheng Wang, Jack Martin, Jiongjie Yu, Kai Wang, Kourosh Saeb-Parsy, Xiao Xu

Journal Article

TODIM and TOPSIS with Z-numbers

Renato A. KROHLING, André G. C. PACHECO, Guilherme A. dos SANTOS

Journal Article