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  • 1
    Electronic Resource
    Electronic Resource
    Steel Thixoforging: Heat Exchange Impact on the Mechanical and Metallurgical Features of Thixoforged Samples (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 701-706 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Steel thixoforging process combines the advantages of performing parts having highlycomplex shapes and good mechanical properties. These advantages result from the shear thinningflow behaviour of semi-solids due to microstructure changes during the material deformation. Manyparameters such as steel grade, raw speed, slug temperature, tool temperature influence the steelthixoforging process. In this work, we are interested in analysing the influence of thermalconditions as well as ram speed on the flow behaviour and the microstructure of the final parts. Todo so, thixo-extrusion tests on a high speed hydraulic press were performed on C38 steels usingdifferent ram speeds and different temperatures for the tools. The temperature is measured in the dieclose to the tool-material interface during the whole process. Correlations between the temperaturemeasurements, the flow profile and the microstructure are discussed. Using the Finite Element codeForge2005, these thixo-extrusion tests are simulated. Using an inverse method, some parametersused in the thermal exchange modelling are identified by successive comparisons betweencalculated and measured temperatures within the die
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.701.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    A conforming crack tip element with quadratic variation in the singular fields (1978)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 12 (1978), S. 279-288 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Shape functions are given for a six node triangular element in which the √r displacement filed varies quadratically in the circumferential direction. Using a convenient co-ordinate system the stiffness development is sketched and the integrations re done exactly in the radial co-ordinate direction. Brief numerical results are presented. Shape functions for a 15 node three-dimensional element are given explicitly. The shape functions provide both constant strain capability and conformability with quadratic isoparametric elements.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620120209
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A finite element procedure for axisymmetric elastomeric solids under general loading (1993)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 36 (1993), S. 2031-2048 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A finite element procedure, which utilizes Fourier series, is developed to compute the large deformations and deflections in axisymmetric elastomeric solids subjected to non-axisymmetric loading. Nearly incompressible and incompressible, isotropic strain energy density functions describe the elastic properties. The nearly incompressible functions become compatible with an analytical integration scheme by using a novel variable to approximate the dilatation. A large spherical elastomeric bearing is analysed with this procedure.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620361206
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  • 4
    Electronic Resource
    Electronic Resource
    A multidata method of approximate Laplace transform inversion (1970)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 2 (1970), S. 207-219 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A newly developed numerical Laplace transform inversion technique is described. A derivation of the method, termed the ‘multidata method’, is presented along with a description of a similar collocation method. Similarities and differences between the two numerical methods are described and discussed. Results of parameter studies of both methods are presented which demonstrate the sensitivity to error displayed by the collocation method and the magnitude of the improvement in accuracy obtainable with the multidata method as compared with the collocation method, especially when errors exist in the function to be inverted.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620020206
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  • 5
    Book
    Book
    Finite elements: ¬An¬ introduction; Vol. 1 (1981)
    Englewood Cliffs, NJ :Prentice-Hall,
    Details
    Title: Finite elements: ¬An¬ introduction; Vol. 1
    Author: Becker, Eric B.
    Contributer: Carey, Graham F. , Oden, J. Tinsley
    Publisher: Englewood Cliffs, NJ :Prentice-Hall,
    Year of publication: 1981
    Pages: 258 S.
    Series Statement: Texas finite element series Vol. 1
    Type of Medium: Book
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