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Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 90-97 doi: 10.1007/s11709-010-0008-3

Abstract: to “dynamic loading” in the form of seismic action on the dam-reservoir-system and alternatively by “impactA fracture mechanics based analysis shows an excessive potential of damage for the afflicted structure

Keywords： dam-reservoir     earthquake     impact     cracking     fracture mechanics    

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Parameter studies on impact in a lap joint

Amir M. RAHMANI,Elizabeth K. ERVIN

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 64-77 doi: 10.1007/s11465-014-0322-x

Abstract:

To represent a loose lap joint, a beam impacting four springs with gaps is modeled. Modal analysis with base excitation is solved, and time histories of contact points are closely monitored. Using the impulse during steady state response, six influential parameters are studied: damping ratio, contact stiffness, intermediate contact position, gap, excitation amplitude and beam height. For all parameters, the system response is highly controlled by modes with two contacting springs. Each parameter’s effect on system response is presented including unstable regions, unique trend behaviours result. Recommendations for structural designers are also noted.

Keywords： impact mechanics     contact     joint behaviour     modal analysis     parameter study    

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Water film coated composite liquid metal marble and its fluidic impact dynamics phenomenon

Yujie DING,Jing LIU

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 29-36 doi: 10.1007/s11708-015-0388-0

Abstract: A composite liquid metal marble made of metal droplet coated with water film was proposed and its impactThis fundamental finding raised profound multiphase fluid mechanics for understanding the complex liquid

Keywords： liquid metal marble     metallic droplet     composite fluid     impact dynamics     multiphase fluid mechanics    

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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: reduction methods were combined to simulate a progressive failure in notched composite plates using a macro mechanics

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

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Dvelopment of Aeronautics and Astronautics With Mechanics

Chen Shilu

Strategic Study of CAE 2003, Volume 5, Issue 3,   Pages 25-26

Abstract:

This paper discusses the development of aeronautics and astronautics with mechanics, reveals the developmentof new branches of interconnected sciences in mechanics, describes the relations of flight mechanicswith aerodynamics, structure mechanics, general mechanics and automatic control, and introduces thenew branch of flight mechanics—flight dynamics of elastic vehicle.

Keywords： aerodynamics     structure mechanics     general mechanics     automatic control     flight mechanics     flight dynamics    

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Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0702-6

Abstract: The creep life of an aeroengine recuperator is investigated in terms of continuum damage mechanics by

Keywords： creep     life assessment     brazed joint     continuum damage mechanics     aeroengine recuperator    

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Study of the mechanics of progressive collapse of FPB isolated beam-pier substructures

Jingcai ZHANG; Yong DING; Xinchun GUAN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 6,   Pages 718-728 doi: 10.1007/s11709-022-0815-3

Abstract: The horizontal stiffness of the isolated layer is reduced substantially by a friction pendulum bearing (FPB) toprotectthe structure from potential damages caused by earthquakes. However, horizontal stiffness is essential to progressive collapse resistance of structures. This paper presents a simplified model to assess the progressive collapse response of beam-pier substructure isolated by FPB. Progressive collapse resistance by flexural action of the beam and additional resistance owing to the horizontal restraining force was achieved. The influences of the equivalent radius and friction coefficient of the FPB, the applied axial force on the FPB, and span-depth ratio of the beam on the additional resistance were investigated. Simulations were conducted to verify the proposed model. The results show that progressive collapse resistance provided by horizontal restraining can be reduced as large as 46% and 88% during compressive arching action (CAA) and catenary action (CA), respectively. The equivalent radius of the FPB shows limited effect on the progressive collapse response of FPB isolated structures, but friction coefficient and applied axial force, as well as depth ratio of the beam, show significant influences on the additional progressive collapse resistance capacity. Finite element method (FEM) results are in good agreement with the result obtained by the proposed method.

Keywords： friction pendulum bearing     progressive collapse     horizontal stiffness     compressive arching action     catenary action    

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Advances in structural mechanics of Chinese ancient architectures

YU Maohong, ODA Yoshiya, FANG Dongping, ZHAO Junhai

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 1,   Pages 1-25 doi: 10.1007/s11709-008-0002-1

Abstract: The researches on the structural mechanics of ancient architectures show the different aspects of structureand mechanics.Systematical studies on the structural mechanics of ancient architectures have been carried out at Xihave in fact problems of structural strength and stability; the need for further studies on structural mechanics
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Generalized Plastic Mechanics and Its Application

Zheng Yingren,Kong Liang

Strategic Study of CAE 2005, Volume 7, Issue 11,   Pages 21-36

Abstract: development of geotechnical plasticity is reviewed and some problems of applying the classic plastic mechanicsBy giving up the three hypotheses, a generalized plastic potential theory can be obtained from solid mechanicsdirectly, and then the traditional plastic mechanics can be changed to a more generalized plastic mechanics, namely generalized plastic mechanics (GPM).

Keywords： geotechnical plastic mechanics     generalized plastic mechanics     plastic potential     yield surface     constitutive    

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A computational toolbox for molecular property prediction based on quantum mechanics and quantitative

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 152-167 doi: 10.1007/s11705-021-2060-z

Abstract: In this paper, a framework combining quantum mechanics and quantitative structure-property relationship, a database is created for collections of basic molecular information; in the second step, quantum mechanics-basedcalculations are performed to predict quantum mechanics-based/derived molecular properties (pseudo experimental

Keywords： molecular property     quantum mechanics     quantitative structure-property relationship     heat of reaction    

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Dynamical Modeling and Numerical Simulation of the Environmentally Friendly Water Hydraulic Percussive Drill

Yue Wenhui,Liu Deshun,Wu xianming,Zhu Pingyu,Li Xibing

Strategic Study of CAE 2007, Volume 9, Issue 8,   Pages 57-61

Abstract:

In this paper,  an environmentally friendly hydraulic percussive drill is introduced,  in which water is used to perform all function of the drill,  such as energy transmission,  push,  chip removing and lubrication.  Then,  dynamics of the percussive drill is modeled by means of elastic bars and springs,  and microcomputer simulation of YST-25 environmentally friendly water hydraulic percussive drill is performed.  The performances of YST-25 environmentally friendly water hydraulic percussive drill are evaluated.  The result indicates that piston meets intensity design demand,  maximum compressive stress of which is 102MPa and maximum tensile stress is 28MPa.  The stress of drill rod is bigger than that of piston.  To reduce the variation of sectional area is helpful to elongate the life of piston.  YST-25 drill is more suitable to drill medium or hard rock so as to keep synthetically both drill speed and energy transfer efficiency.  The suggestions can improve the design of environmentally friendly hydraulic percussive drill.

Keywords： impact     wave mechanics     simulation     water hydraulic percussive drill    

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Tsien and His Work on Mechanics①

Tan Qingming

Strategic Study of CAE 2001, Volume 3, Issue 10,   Pages 1-6

Abstract: Tsien to modern mechanics and engineering sciences, especially his work on a series of key problems inaerodynamics, solid mechanics and jet propulsion, are introduced.many new branches of engineering sciences were established, such as engineering dybernetics, physical mechanics

Keywords： Hsue-Shen Tsien     mechanics     engineering sciences    

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Analysis of actuating mechanics characteristics for a flexible miniature robot system

YU Lianzhi, YAN Guozheng, MA Guanying, ZAN Peng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 66-70 doi: 10.1007/s11465-008-0006-5

Abstract: The actuating mechanics characteristics of the robot are analyzed.

Keywords： calculation     consistent     endoscope inspection     electro-pneumatic     miniature endoscope    

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Review and Prospect of Mechanics of Jointed Rock Masses and Its Applications

Xie Heping

Strategic Study of CAE 2003, Volume 5, Issue 3,   Pages 31-38

Abstract:

Mechanics of jointed rock masses is a new branch derived from mining engineering and engineering mechanicsAimed at the practical problems in mining engineering, this paper reviews the recent developments in mechanicsof rock masses and its applications, including damage mechanics of rock masses and its applications,and fractal theory and applications of mechanics of rock masses.Moreover, a development tendency of mechanics of rock masses, i. e.

Keywords： mechanics of jointed rock masses     recent development     prospect    

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Game theoretic analysis of environmental impact assessment system in China

CHENG Hongguang, PU Xiao, GONG Li, QI Ye

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 448-453 doi: 10.1007/s11783-007-0071-8

Abstract: Environmental impact assessment (EIA) system has been established in China since 1973.

Keywords： public     impact assessment     Environmental impact     general    

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Title Author Date Type Operation

Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Journal Article

Parameter studies on impact in a lap joint

Amir M. RAHMANI,Elizabeth K. ERVIN

Journal Article

Water film coated composite liquid metal marble and its fluidic impact dynamics phenomenon

Yujie DING,Jing LIU

Journal Article

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

Journal Article

Dvelopment of Aeronautics and Astronautics With Mechanics

Chen Shilu

Journal Article

Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach

Journal Article

Study of the mechanics of progressive collapse of FPB isolated beam-pier substructures

Jingcai ZHANG; Yong DING; Xinchun GUAN

Journal Article

Advances in structural mechanics of Chinese ancient architectures

YU Maohong, ODA Yoshiya, FANG Dongping, ZHAO Junhai

Journal Article

Generalized Plastic Mechanics and Its Application

Zheng Yingren,Kong Liang

Journal Article

A computational toolbox for molecular property prediction based on quantum mechanics and quantitative

Journal Article

Dynamical Modeling and Numerical Simulation of the Environmentally Friendly Water Hydraulic Percussive Drill

Yue Wenhui,Liu Deshun,Wu xianming,Zhu Pingyu,Li Xibing

Journal Article

Tsien and His Work on Mechanics①

Tan Qingming

Journal Article

Analysis of actuating mechanics characteristics for a flexible miniature robot system

YU Lianzhi, YAN Guozheng, MA Guanying, ZAN Peng

Journal Article

Review and Prospect of Mechanics of Jointed Rock Masses and Its Applications

Xie Heping

Journal Article

Game theoretic analysis of environmental impact assessment system in China

CHENG Hongguang, PU Xiao, GONG Li, QI Ye

Journal Article