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  • 1
    Digitale Medien
    Digitale Medien
    Developments in RGB Photoelasticity (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Applied mechanics and materials Vol. 3-4 (Aug. 2006), p. 205-210 
    Details
    ISSN: 1662-7482
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Maschinenbau
    Notizen: In this paper the combined use of both RGB and phase stepping photoelasticity is proposed. The method is characterised by the following features: maximum measurable order greater than that of the RGB method, ability to determine the total fringe order without necessity of unwrapping
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.3-4.205.pdf
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  • 2
    Digitale Medien
    Digitale Medien
    Determination of vibration phase by stroboscopic sandwich holography
    Amsterdam : Elsevier
    Optics and Lasers in Engineering 6 (1985), S. 101-109 
    Details
    ISSN: 0143-8166
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Maschinenbau , Physik , Technik allgemein
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0143-8166(85)90018-1
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  • 3
    Digitale Medien
    Digitale Medien
    On the Stiffness and the Reinforcement Effect of Electrical Resistance Strain Gauges (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Applied mechanics and materials Vol. 3-4 (Aug. 2006), p. 349-354 
    Details
    ISSN: 1662-7482
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Maschinenbau
    Notizen: The reinforcement effect of a strain gauge installed on low modulus materials can be significant. The increasing use of low modulus materials requires therefore the evaluation of such effect. This paper concerns the relationship between the local reinforcement effect and the strain gauge stiffness. The conclusion is that the gauge stiffness alone does not allow the user a thorough evaluation of the reinforcement effect
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMM.3-4.349.pdf
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  • 4
    Digitale Medien
    Digitale Medien
    Holographic photoelasticity: Determination of absolute retardations by a single hologram (1976)
    Springer
    Experimental mechanics 16 (1976), S. 273-275 
    Details
    ISSN: 1741-2765
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract In this paper, real-time holographic interferometry is applied to determine the absolute-retardation fringes in the photoelastic analysis of plane models. The method requires only one hologram recorded with the model unloaded. In the reconstruction process, the mcdel is loaded and the polarizers on the reference and object beams are rotated through the same angle. At the points of the model where the polarization direction is parallel to one of the principal stresses, only the corresponding family of absolute retardations is obtained. The technique is demonstrated experimentally using a deep beam centrally loaded.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02321153
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  • 5
    Digitale Medien
    Digitale Medien
    Limitation of fourier transform photoelasticity: Influence of isoclinics (2000)
    Springer
    Experimental mechanics 40 (2000), S. 384-392 
    Details
    ISSN: 1741-2765
    Schlagwort(e): Experimental mechanics ; image processing ; photoelasticity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract The application of the Fourier transform to photoelasticity was used in the evaluation of the retardation using a carrier system of fringes. In photoelasticity, the light intensity from the analyzer in a circular polariscope depends on both the retardation (isochromatics) and the isoclinic parameter. The theoretical analysis shows that the angle between the principal stresses in the model and in the carrier system of fringes influences the evaluation of the retardation (isochromatics), as occurs when misaligned compensators (namely, Babinet) are used. As a consequence, this method may not be applied as a full-field technique, although the error is small if the angle between the principal stresses in the model and in the carrier is less than 25 deg. Numerical simulations and experimental tests were conducted to corroborate this prediction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02326484
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  • 6
    Digitale Medien
    Digitale Medien
    Towards RGB photoelasticity: Full-field automated photoelasticity in white light (1995)
    Springer
    Experimental mechanics 35 (1995), S. 193-200 
    Details
    ISSN: 1741-2765
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau
    Notizen: Abstract In this paper a new full-field method for the automatic analysis of isochromatic fringes in white light is presented. The method, named RGB photoelasticity, eliminates the typical drawbacks of the classical approach to photoelasticity in white light which requires a subjective analysis of colors and an experienced analyst to acquire and interpret the results. The proposed method makes it possible to determine retardations uniquely in the range of 0–3 fringe orders. For this purpose the isochromatics are acquired by means of a color video camera and the colors are decomposed in the three primary colors (red, green and blue) and compared to those stored in a calibration array in the system. Furthermore, the influence of various spurious effects on the accuracy of the proposed method is experimentally evaluated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02319657
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