Abstract
Computer-aided methods for evaluation of photoelastic patterns use video technique and digital image processing. They are based on localization of fringe centers [ 1, 2, 3, 4]. Neighbourhood operations are needed to reduce the influence of nonuniform illumination, inhomogeneous optical components and models, etc. Fractional orders of the relative retardation and of the isoclinic parameter at points between the fringes are computed by spline- functions, if the components of the plane stress state have to be derived from photoelastic data. In the following a method is proposed, which enables the complete extraction of photoelastic information at local picture elements (pixel) from series of related images of the same stress state. For this purpose the well-established phase-shifting technique (see e. g. [ 5,6]) was modified to meet the special requirements of photoelastic patterns.
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References
Müller RK and Gaupp M: Rechnergestützte Auswertung spannungsoptischer Modellversuche mit der digitalen Bildverarbeitung. VDI-Berichte Nr. 514, 1984, pp. 165–168.
Rasche N and Simon B: Anwendung der digitalen Bilverarbeitung in der Spannungsoptik am Beispiel des Schubspannungsdifferenzenverfahrens. VDI-Berichte Nr. 480, 1983, pp. 63–68.
Perzborn V and Laermann K-H: Einsatz der digitalen Bildverarbeitung zur Auswertung von Interferenzstreifenmustern in der Spannungsoptik. VDI- Berichte Nr. 552, 1985, pp. 1–13.
Hapel K-H: Digitale Bildverarbeitung spannungsoptischer Isochromaten- bilder. Forschung im Ingenieurwesen, Vol. 51, 1985, Nr. 6, pp. 193–199.
Dändliker R, Thalmann R and Willemin J-F: Fringe interpolation by two- reference-beam holographic interferometry: reducing sensitivity to hologram misalignment. Optics Communications, Vol. 42, 1982, Nr. 5, pp. 301–306.
Dörband B: Die 3-Interferogramm-Methode zur automatischen Streifenauswertung in rechnergesteuerten digitalen Zweistrahlinterferometern. Optik, Vol. 60, No. 2, 1982, pp 161–174.
Carré P: Installation et utilisation du comparateur photoélectrique et interfêrentiel du Bureau Internationale des Poids et Mesures. Metro- logia, Vol. 2, 1966, No. 1, pp. 13–23.
Cheng Y-Y and Wyant JC: Phase shifter calibration in phase-shifting interferometry. Applied Optics. Vol. 24, 1985, Nr. 18, pp. 30492–3052.
Hudec M: Détermination du retard photoêlastique par compensation fin Serbo-Croatian]. Publikacije technickog faculteta v. Sajarevu, 1959, pp. 21–28.
Lagarde A: On some aspects in the development of photoelastic measurements. In: Optical Methods in Mechanics of Solids, edited by A.Lagarde. Aalphen an den Rijn, Rockfield, Maryland: Sijthoff & Nordhoff 1981, pp. 1–40.
Hecker FW: Spannungsoptische Untersuchungen von Scheibenmodellen im Halbtonfeld. VDI-Berichte Nr. 297, 1977, pp. 29–36.
Oheix P: Méthode globale de détermination de l’ordre de frange en valeur algébrique d’un modèle photoêlastique bidimensionel et visualisation des franges de quart d’ordre. C. R. Acad. Se. Paris, t. 279, No. 15, Série B- 28, 1974, pp. 361–363.
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© 1986 Martinus Nijhoff Publishers, Dordrecht
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Hecker, F.W., Morche, B. (1986). Computer-Aided Measurement of Relative Retardations in Plane Photoelasticity. In: Wieringa, H. (eds) Experimental Stress Analysis. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4416-9_58
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DOI: https://doi.org/10.1007/978-94-009-4416-9_58
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