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  • 2005-2009  (3)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Elastic-Plastic Behaviour of a Plate with a Central Hole by Photoelastic Coating Method (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Applied mechanics and materials Vol. 3-4 (Aug. 2006), p. 27-32 
    Details
    ISSN: 1662-7482
    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: An application of the elastic-plastic problem by the photoelastic coating method is presented in this paper. A general procedure of this experiment, such as image processing and separation of the difference of principal strain to obtaine stresses from isochromatic fringes is referred. The methodology to extract centre lines of coloured isochromatic fringes is explained. Experiments are conducted with cross-shaped aluminum specimens with a circular hole subjected to uniaxial tension and equi-biaxial tension. Results of image processing are shown, and the distribution of difference of principal strains and separated principal strain are shown in the case of equi-biaxial tension
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.3-4.27.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Strengthening and Ductilization of D0〈sub〉3〈/sub〉-Type Fe〈sub〉3〈/sub〉Al Intermetallic Alloys by Dispersion of Laves Phases Fe〈sub〉2〈/sub〉Zr and Fe〈sub〉2〈/sub〉Nb (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), 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
    Notes: Zr and/or Nb added Fe3Al based intermetallic alloys (i.e., Fe3Al-Zr, Fe3Al-Nb andFe3Al-Zr-Nb) were arc-melted, homogenized, hot-rolled and then annealed to evaluate microstructureand tensile property at room temperature as well as at a high temperature (873K). After annealing,the rolled alloys exhibited a recrystallized microstructure containing coarse second phase particles,except for the Nb-added alloy with a minor content of Nb. Relatively high tensile elongation aswell as high tensile strength was observed at room temperature in the Zr-added alloys with a minoramount of Zr. Also, these alloys showed relatively high tensile strength and elongation at high temperature(873K). The results suggest that tensile ductility as well as strength of Fe3Al-based alloyscan be improved by introduction of the second phase dispersions
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.395.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Testing the Rothamsted Carbon Model against data from long-term experiments on upland soils in Thailand (2005)
    Oxford, UK; Malden, USA : Blackwell Science Ltd
    European journal of soil science 56 (2005), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: We tested the Rothamsted Carbon Model (RothC) against three long-term (27–28 years) experimental sites on Thai upland soils in order to see how this widely used ‘temperate’ soil carbon turnover model performed in a typical farming region in the tropics. We were able to verify – over a much longer period than had been examined in previous studies – that RothC performs well in a tropical region in plots used for continuous cropping experiments of maize and cassava without organic matter application. However, the model overestimated soil organic carbon (SOC) in some plots to which large amounts of organic matter (rice straw or cassava stalks) were applied. This overestimate could not be attributed to errors in estimating either the amount of C input to the soil or the ratio of decomposable plant materials to resistant plant materials entering the soil. Among many factors affecting SOC dynamics (e.g. weather conditions, soil characteristics, etc.), which are different in tropical regions from temperate regions, we conclude that the activity of soil fauna might be a major factor which makes the performance of RothC worse where much organic matter was applied. We suggest that care should be taken when applying RothC to tropical soils with large amounts of added organic matter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2389.2004.00659.x
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