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Stability analysis of slopes with planar failure using variational calculus and numerical methods

Norly BELANDRIA, Roberto ÚCAR, Francisco M. LEÓN, Ferri HASSANI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1262-1273 doi: 10.1007/s11709-020-0657-9

Abstract: technique of variational calculus applied to estimate the slope stability considering the mechanism of planarfailure.The surface of the critical planar failure is determined by applying the condition of transversalityThe number of slices is varied in one of the examples, while the surface of the critical planar failureAll the results obtained by considering normal stress, safety factors, and critical planar failure are

Keywords： slopes stability     planar failure     variational calculus     numerical methods    

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Genetic evidence in planar cell polarity signaling pathway in human neural tube defects

Chunquan Cai, Ouyan Shi

Frontiers of Medicine 2014, Volume 8, Issue 1,   Pages 68-78 doi: 10.1007/s11684-014-0308-4

Abstract: The planar cell polarity (PCP) pathway controls the process of convergent extension (CE) during gastrulation

Keywords： planar cell polarity     neural tube defects     rare mutations    

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Static balancing of planar articulated robots

Giuseppe QUAGLIA,Zhe YIN

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 326-343 doi: 10.1007/s11465-015-0355-9

Abstract:

Static balancing for a manipulator’s weight is necessary in terms of energy saving and performance improvement. This paper proposes a method to design balancing devices for articulated robots in industry, based on robotic dynamics. Full design details for the balancing system using springs are presented from two aspects: One is the optimization for the position of the balancing system; the other is the design of the spring parameters. As examples, two feasible balancing devices are proposed, based on different robotic structures: The first solution consists of linkages and springs; the other consists of pulleys, cross mechanisms and (hydro-) pneumatic springs. Then the two solutions are compared. Pneumatic, hydro-pneumatic and mechanical springs are discussed and their parameters are decided according to the requirements of torque compensation. Numerical results show that with the proper design using the methodology presented in this paper, an articulated robot can be statically balanced perfectly in all configurations. This paper therefore provides a design method of the balancing system for other similar structures.

Keywords： robotics     static balancing     pneumatic spring     mechanical spring     torque compensation    

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Cusp points and assembly changing motions in the PRR-PR-PRR planar parallel manipulator

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0743-x

Abstract: This study investigates the cusp points and assembly changing motions in a two degrees of freedom planar

Keywords： planar parallel manipulator     assembly changing motions     cusp points     quartic polynomial     discriminant    

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Numerical investigation of the chemical and electrochemical characteristics of planar solid oxide fuel

Yuzhang WANG, Shilie WENG, Yiwu WENG

Frontiers in Energy 2011, Volume 5, Issue 2,   Pages 195-206 doi: 10.1007/s11708-011-0148-8

Abstract: A fully three-dimensional mathematical model of a planar solid oxide fuel cell (SOFC) with complete direct

Keywords： planar solid oxide fuel cell (SOFC)     direct internal reforming     chemical reaction     methane     electrochemical    

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Static behavior of planar intersecting CFST connection in diagrid structure

Ling LI, Xianzhong ZHAO, Ke KE

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 355-365 doi: 10.1007/s11709-011-0125-7

Abstract: The failure modes, force mechanism and bearing capacity of intersecting CFST connections are analyzedParametric analysis indicates that bearing capacity of planar intersecting CFST connection mainly dependsCapacity estimation method for planar intersecting CFST connection is proposed basing on the capacity

Keywords： diagrid structure     concrete-filled steel tube     planar intersecting connection     experimental research     mechanism    

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Polyhedral linkages obtained as assemblies of planar link groups

GÖkhan KİPER, Eres SÖYLEMEZ

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 1,   Pages 3-9 doi: 10.1007/s11465-013-0363-6

Abstract: means of obtaining polyhedral linkages for homothetic deployment of polyhedral shapes by embedding planarmay be suitable for such a purpose and what are the compatibility conditions for spatially assembling planar

Keywords： polyhedral linkages     homothety     homohedra     tangential polyhedra    

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Dynamic modeling of flexible-links planar parallel robots

DU Zhaocai, YU Yueqing, ZHANG Xuping, DU Zhaocai

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 232-237 doi: 10.1007/s11465-008-0032-3

Abstract: Kineto-Elasto dynamics (KED) theory and Lagrange formula are used to derive the dynamic equations of planarThe dynamic behavior of the flexible-links planar parallel robot is well illustrated through numericalsimulation of a planar 3-RR parallel robot.demonstrated to have a significant impact on the position error and orientation error of the flexible-links planar

Keywords： 3-RR parallel     KED     coupling     software SAMCEF     orientation    

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Integrated management of cardiac failure: the cardiac failure clinic

Daniel LOISANCE

Frontiers of Medicine 2011, Volume 5, Issue 1,   Pages 20-25 doi: 10.1007/s11684-011-0106-1

Abstract:

The prevalence of the risk factors and the risk of cardiac failure are both increasing in China.The wide range of clinical presentations of cardiac failure (acute or chronic) and of therapeutic approaches

Keywords： cardiac failure     cardiac transplantation     mechanical circulatory support    

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Loss of liver kinase B1 causes planar polarity defects in cochlear hair cells in mice

Yuqin Men,Aizhen Zhang,Liwen Zhang,Yecheng Jin,Zhishuo Wang,Jing Zhao,Xiaolin Yu,Jian Zhang,Jiangang Gao

Frontiers of Medicine 2016, Volume 10, Issue 4,   Pages 481-489 doi: 10.1007/s11684-016-0494-3

Abstract: The orientation of stereociliary bundles and the migration of kinocilia are critical indicators of planarLKB1 deficiency in LKB1Pax2 CKO mice thus disrupted hair cell planar polarity during

Keywords： LKB1     stereociliary bundles     kinocilium     planar cell polarity     hearing     mice    

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Analysis of the dynamic stress of planar flexible-links parallel robots

DU Zhaocai, YU Yueqing, YANG Jianxin

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 152-158 doi: 10.1007/s11465-007-0025-7

Abstract: This paper presents a method for the dynamic stress analysis of planar parallel robots with flexible

Keywords： numerical simulation     Due     coupling     software SAMCEF     flexibility    

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Progressive failure analysis of notched composite plate by utilizing macro mechanics approach

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 623-642 doi: 10.1007/s11709-021-0726-8

Abstract: In this study, gradual and sudden reduction methods were combined to simulate a progressive failure inUsing the presented method, a progressive failure is simulated based on a linear softening law priorto a catastrophic failure, and thereafter, sudden reduction methods are employed for modeling a progressivefailure.The proposed method is intended to predict the first ply failure (FPF), LPF, and dominant failure modes

Keywords： progressive failure     notched composite plate     Hashin failure criterion     macro mechanics approach     finite    

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Nongray radiation from gas and soot mixtures in planar plates based on statistical narrow-band spectral

Huaqiang CHU, Qiang CHENG, Huaichun ZHOU, Fengshan LIU

Frontiers in Energy 2011, Volume 5, Issue 2,   Pages 149-158 doi: 10.1007/s11708-010-0124-8

Abstract: The nongray behavior of combustion products plays an important role in various areas of engineering. Based on the statistical narrow-band (SNB) spectral model with an exponential-tailed inverse intensity distribution and the ray-tracing method, a comprehensive investigation of the influence of soot on nongray radiation from mixtures containing H O/N +soot, CO /N +soot, or H O/CO /N +soot was conducted in this paper. In combustion applications, radiation transfer is significantly enhanced by soot due to its spectrally continuous emission. The effect of soot volume fraction up to 1×10 on the source term, the narrow-band radiation intensities along a line-of-sight, and the net wall heat fluxes were investigated for a wide range of temperature. The effect of soot was significant and became increasingly drastic with the increase of soot loading.

Keywords： soot     combustion     SNB model     nongray radiation    

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Understanding coupled factors that affect the modelling accuracy of typical planar compliant mechanisms

Guangbo HAO,Haiyang LI,Suzen KEMALCAN,Guimin CHEN,Jingjun YU

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 129-134 doi: 10.1007/s11465-016-0392-z

Abstract:

In order to accurately model compliant mechanism utilizing plate flexures, qualitative planar stress(Young’s modulus) and planar strain (plate modulus) assumptions are not feasible.presence of large load-stiffening effect makes the equivalent modulus significantly deviate from the planar

Keywords： coupling factors     modelling accuracy     compliant mechanisms     equivalent modulus    

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Study on the Method About Type Synthesis of the One-dof Planar Closed Chain’s Mechanisms

Zhang Meilin,Zhang Ye,Yang Zhiyi

Strategic Study of CAE 2002, Volume 4, Issue 6,   Pages 5-8

Abstract:

This paper puts forward a kind of method about type synthesis of the one-dof planar closed chain's mechanisms, that is , “type synthesis by planar graph”.method is that components of the chain are set up by the mechanical function first of all, then the planar

Keywords： mechanisms     kinematic chain     planar graph    

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Title Author Date Type Operation

Stability analysis of slopes with planar failure using variational calculus and numerical methods

Norly BELANDRIA, Roberto ÚCAR, Francisco M. LEÓN, Ferri HASSANI

Journal Article

Genetic evidence in planar cell polarity signaling pathway in human neural tube defects

Chunquan Cai, Ouyan Shi

Journal Article

Static balancing of planar articulated robots

Giuseppe QUAGLIA,Zhe YIN

Journal Article

Cusp points and assembly changing motions in the PRR-PR-PRR planar parallel manipulator

Journal Article

Numerical investigation of the chemical and electrochemical characteristics of planar solid oxide fuel

Yuzhang WANG, Shilie WENG, Yiwu WENG

Journal Article

Static behavior of planar intersecting CFST connection in diagrid structure

Ling LI, Xianzhong ZHAO, Ke KE

Journal Article

Polyhedral linkages obtained as assemblies of planar link groups

GÖkhan KİPER, Eres SÖYLEMEZ

Journal Article

Dynamic modeling of flexible-links planar parallel robots

DU Zhaocai, YU Yueqing, ZHANG Xuping, DU Zhaocai

Journal Article

Integrated management of cardiac failure: the cardiac failure clinic

Daniel LOISANCE

Journal Article

Loss of liver kinase B1 causes planar polarity defects in cochlear hair cells in mice

Yuqin Men,Aizhen Zhang,Liwen Zhang,Yecheng Jin,Zhishuo Wang,Jing Zhao,Xiaolin Yu,Jian Zhang,Jiangang Gao

Journal Article

Analysis of the dynamic stress of planar flexible-links parallel robots

DU Zhaocai, YU Yueqing, YANG Jianxin

Journal Article

Progressive failure analysis of notched composite plate by utilizing macro mechanics approach

Journal Article

Nongray radiation from gas and soot mixtures in planar plates based on statistical narrow-band spectral

Huaqiang CHU, Qiang CHENG, Huaichun ZHOU, Fengshan LIU

Journal Article

Understanding coupled factors that affect the modelling accuracy of typical planar compliant mechanisms

Guangbo HAO,Haiyang LI,Suzen KEMALCAN,Guimin CHEN,Jingjun YU

Journal Article

Study on the Method About Type Synthesis of the One-dof Planar Closed Chain’s Mechanisms

Zhang Meilin,Zhang Ye,Yang Zhiyi

Journal Article