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  • 1
    Electronic Resource
    Electronic Resource
    Nonpropagating solitons of the variable coefficient and nonisospectral Korteweg–de Vries equation (1989)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 30 (1989), S. 2521-2526 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: The method of inverse scattering is extended to solve the initial value problem of a variable coefficient and nonisospectral Korteweg–de Vries equation with time varying boundary condition. One- and two-soliton solutions are examined in detail. By an appropriate decomposition, soliton interactions and asymptotic behaviors are investigated. Oscillating and asymptotically standing two-soliton solutions are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.528533
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  • 2
    Electronic Resource
    Electronic Resource
    PbTiO3 thin films prepared by metalorganic chemical vapor deposition on LaAlO3 (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 148-150 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High-quality PbTiO3 thin films have been grown on LaAlO3 substrates by metalorganic chemical vapor deposition, using purified metalorganic precursors titanium-iso-propoxide and tetra-ethyl-lead. The results of the cross-section scanning electron microscopy and x-ray diffraction (XRD), including theta and phi scan, show that the films are epitaxy, and a domains and c domains may align alternately in the thin films. The experiments of high-temperature XRD reveal the nature of the phase transition of grown PbTiO3 thin films from tetragonal to cubic phase. The transition temperature is around 460 °C which is far lower than that of bulk PbTiO3 and the thin films deposited on fused quartz substrates. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.113545
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  • 3
    Electronic Resource
    Electronic Resource
    Damage Constitutive Relationship of SRC Member Nonlinear Analysis (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 348-349 (Sept. 2007), p. 833-836 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The damage constitutive relationship is a key problem to nonlinear analysis of structuralmembers. It is much more necessary to study systematically related damage constitutive relationshipof steel reinforced concrete (SRC) members because of their peculiarity. Based on the experimentalphenomena analysis and damage theory, the mesoscopic failure mechanism of concrete as well as theinterface of shaped steel and concrete is analyzed. At the same time, their mesoscopic damage modelsand corresponding assumptions of the models are established by considering material failurecharacteristics. Subsequently, the mechanism of the models is analyzed, which indicates that they fitto simulate failure process of the materials. According to the models, the related damage constitutiverelationship for SRC members is deduced by principle of energy and force balance. Combined withcorresponding experimental study, it is shown that the constitutive relationship presented isreasonable and practicable, so it facilitates SRC member nonlinear analysis
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.833.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Seismic Damage Model for Steel Reinforced High Strength and High Performance Concrete Frame Joints (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 348-349 (Sept. 2007), p. 837-840 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Based on damage mechanics and failure model, a seismic damage model applying to steelreinforced high strength and high performance concrete frame joints is put forward, which takesdeformation and cumulative damage into account. The damage performance of five tentative framejoints is compared and analyzed according to deformation and dissipated hysteretic energy underdifferent loading levels, and the main influence factors on damage performance are established. Thedamage indexes of tentative frame joints are calculated, and the influence of strength grade ofconcrete and axial compression ratio on damage performance is discussed. The results indicate thatthe general damage is controlled by the damage of concrete in the earlier stage of loading, and by thedamage of shape steel and stirrup in the later stage of loading; joints with lower axial compressionratio and lower concrete strength grade possess better hysteretic energy performance. Damageanalysis provides an available means for the research of steel reinforced high strength and highperformance concrete frame joints under seismic load. The damage model presented can be areference for seismic damage analysis of the structure, prediction of earthquake damage in future,estimation of economic loss and repair after earthquake
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.837.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Characteristics of Fracture Mechanics for Crack Tip near the Interface between Steel and Concrete in Composite Structures (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 348-349 (Sept. 2007), p. 841-844 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Steel-concrete composite structures are widely used in high buildings for its excellentseismic behaviors, whereas faults or cracks, which have great influence on interfacial mechanicalbehaviors of structural members, inevitably form near the interface between steel and concrete duringthe process of molding. Therefore, it is necessary to study the mechanical characteristics of the cracktip near the interface. In this paper, the application scope of the path-independence of J-integral insteel-concrete composite structure with a crack is discussed. According to the conservation law ofJ-integral for the steel-concrete composite structure with a crack parallel to the interface, a hypothesisthat the value of strain energy release rate (SERR) of the mode-$fracture is independent of the cracklocation when the crack is parallel and close to the interface is put forwarded. And this hypothesis isverified through finite element method (FEM). A schematic model for a skew crack near thesteel-concrete interface is provided. The variation law of SERR with the Dundur’s parameters and theangle between crack direction and interface are calculated by FEM. At last, calculating method of thestress intensity factor as well as the SERR for a skew crack near the interface is suggested. All thesemay contribute to further investigation on interfacial mechanical behaviors for steel-concretecomposite structure
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.841.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Theoretical Model for Interfacial Nonlinear Bond Softening Behavior between Embedded Steel and HSHPC (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 348-349 (Sept. 2007), p. 845-848 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The latest experimental study on steel reinforced high strength and high performanceconcrete (SRHSHPC) specimens shows that there exists interfacial bond softening phenomenonbetween embedded steel and high strength and high performance concrete (HSHPC), and it makes theshear transfer capacity between shaped steel and HSHPC be progressively reduced. To predictfailure load in design, a theoretical model for interfacial bond softening behavior is required. Asinterfacial bond softening behavior is a nonlinear process involving material properties, it can beanalyzed once the relation of interfacial bond stress (τ ) and slippage ( s ) is known. In this paper, themechanism of interfacial bond-slip is studied, thus a simplified τ − s relation including ascending anddescending parts is proposed and employed to analyze the interfacial nonlinear bond-slip process.Based on the interfacial equilibrium between steel and HSHPC as well as the τ − s relation, the basicgoverning equations in both softened region and elastic region are established and solved for steelstrain or stress. At last, the application of the model is verified through comparison with experimentalresults. The calculating results of the model are found to be in good agreement with experimentalresults, showing that the model can describe the bond-slip process in real material systems
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.845.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Theoretical Analysis and Experimental Study on Damage Probability of HSHP Concrete (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 348-349 (Sept. 2007), p. 849-852 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Damage probability is a new concept in modern engineering design. If the cumulativedamage probability of member or material is known, then the rational design can be realized. Basedon study of high-strength and high-performance (HSHP) concrete applied to steel reinforced concrete(SRC) structures, the equation of the cumulative damage probability of HSHP concrete is derived byWeibull theory. The calculation and analysis indicate that the theoretical equation presented give asuitably mathematical limit for damage probability of specimens. At the same time, the new methodfor Weibull parameters is established, which depends on the theory of the damage probability andcomputer graphics technology. The comparison of experimental curves with theoretical curves showsthat the established equation can properly simulate the damage evolution of HSHP concrete.Them value, one of Weibull parameters, is studied in detail, which reveals that it is a key parameter toquality control. At last, the effect of specimen volume upon damage probability is also discussed. Theresearch provides methods and ideas to improve performance of concrete material and simulatedamage probability of HSHP concrete
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.849.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Gas Velocity Measurements of Close-Coupled Atomizers (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 1819-1822 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: It is commonly considered that the character of atomizing gas-flowing field would affectbreaking method of molten metal, liquid droplet size and mass distribution. It is one of the importantfactors which determine the microstructure and metallurgical quality of products. In this paper, threetypes of atomizers were designed and Pitot tube was used to investigate the steady state gas flow fieldgenerated by a close-coupled spray deposition atomizer. Through the study of atomization gasvelocity distribution by simulation and experiment, the construction and gas flow dynamical propertywere introduced in this paper
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1819.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Mathematical Simulation of Billet Profile during Spray Forming Process (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 1961-1966 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The parameters of atomizer were obtained from the experiment. Based on the obtainedparameters, a mathematical model was proposed to simulate the growing profile of billet during sprayforming. The model included some process parameters which relate to the shape profile such asnozzle data, eccentric distance, rotation speed, withdraw speed and so on. After being compared withthe billet shape of experiment, we got good consistent results between the simulation and experiment,it was found that the results of the simulation is in good consistent with that of the experiment
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1961.pdf
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