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  • 1
    Electronic Resource
    Electronic Resource
    Diffusion of Positrons to Surface in Semiconductors (1994)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 175-178 (Nov. 1994), p. 395-398 
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/00/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.175-178.395.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The Effects of Positron Diffusion and its Application in Composite System (1997)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 255-257 (Sept. 1997), p. 269-271 
    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
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/02/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.255-257.269.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A Numerical Method for Predicting the Time to Surface Cracking of Corrosion Affected RC Structures (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 55-58 
    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: Practical experience and observations suggest that corrosion affected reinforced concrete(RC) structures are more prone to cracking than other forms of structural deterioration. Concretecracking incurs considerable costs of repairs and inconvenience to the public due to interruptions.This gives rise to the need for prediction of the time to surface cracking of concrete in order toachieve cost-effectiveness in maintaining the serviceability of RC structures. The intention of thispaper is to develop a numerical method for predicting the time to surface cracking of corrosionaffected RC structures. In this method, concrete with embedded reinforcing steel bars is modeled asa thick-wall cylinder. With an exponential curve modeling the energy dissipation process inconcrete, the element transfer matrix is derived analytically. The time to surface cracking is thendetermined by solving the nonlinear problem numerically. Finally, the validity of this numericalmethod is verified by comparing with experimental results collected from the research literature
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.55.pdf
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of Interfacial Transition Zone on Chloride Diffusion Coefficient (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 302-303 (Jan. 2006), p. 167-174 
    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: A three-phase composite circle model is presented in this paper to assess the effect of interfacial transition zone (ITZ) on the chloride diffusion coefficient of concrete. Firstly, the distribution of circular aggregate particles was simulated in a square concrete element. Based on the simulated concrete mesostructure, the Monte Carlo algorithm was adopted to numerically evaluate the ITZ area fraction for different concrete mixes. A parametric study was then conducted to quantify the effects of the largest aggregate diameter, ITZ thickness and aggregate gradation on the ITZ area fraction. Secondly, the ITZ was modeled as a thin-wall annular plate located between a circular aggregate particle and a thick-wall cement paste annular plate. With the three-phase composite circle model, an analytical solution was derived for the chloride diffusion coefficient of concrete. Finally, the derived solution was verified by experimental results obtained from the research literature and a quantitative relationship between the thickness and chloride diffusion coefficient of ITZ was established
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.302-303.167.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Prediction of Crack Width of Chloride Contaminated Reinforced Concrete Structures (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 302-303 (Jan. 2006), p. 610-617 
    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: Crack width is a significant parameter for assessing service life of reinforced concrete structures in chloride-laden environments. Corrosion-induced concrete cracking is a predominant causal factor influencing premature degradation of reinforced concrete structures, incurring considerable costs for repairs and inconvenience to the public due to interruptions. This gives rise to the need for accurate prediction of crack width in order to achieve cost-effectiveness in maintaining serviceability of concrete structures. It is in this regard that the present paper attempts to develop a quasi-brittle mechanical model to predict crack width of chloride contaminated concrete structures. Assuming that cracks be smeared uniformly in all directions and concrete be a quasi-brittle material, the displacement and stress in a concrete cover, before and after surface cracking, were derivedrespectively in an analytical manner. Crack width, as a function of the cover depth, steel bar diameter, corrosion rate and time, was then determined. Finally, the analysis results were verified by comparing the solution with the experimental results. The effects of the cover depth, steel bar diameter and corrosion rate on the service life were discussed in detail
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.302-303.610.pdf
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A New Numerical Method for Axisymmetrical Bending of Circular Plates with Large Deflection (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 2699-2702 
    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: A simple and efficient spline integral equation method is presented in this paper for theaxisymmetrical bending of circular plates with large deflection. Based on two second-orderdifferential equations in terms of the slope of the deflection surface and the radial displacement ofthe circular plate, two integral equations are derived. The circular plate is then equidistantly dividedinto a circular plate element and a series of annular plate elements along its radial direction and theslope of the deflection surface and the radial displacement are both approximated by cubic splineinterpolation. The two integral equations are solved numerically and the displacements and internalforces at any point within the circular plate can be obtained. Finally, some numerical results arepresented for illustrating the validity of the proposed method. It can be concluded that the proposednumerical method can be used to analyze circular plates with large deflection with reasonableaccuracy
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.2699.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    A Simple Spline Integral Equation Method for Circular Plates with Variable Thickness (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 2687-2690 
    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: A simple spline integral equation method is presented in this paper for theaxisymmetrical bending of circular plates with variable thickness. Firstly, the fundamental solutionof a second-order differential equation is derived. With the slope of the deflection surface taken asan unknown function, an integral equation is then established for circular plates with variablethickness. The integral equation is solved numerically by cubic spline interpolation and thedeflection and bending moment at any point within the circular plate are obtained. Finally, thevalidity of the proposed method is verified with the analytical solution obtained from the literature
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.2687.pdf
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