Abstract
An attempt is made in dynamic photoelasticity to get the principal directions and principal stresses of a time-dependent two-dimensional state by three simultaneous photoelectric signals. The signals are obtained from birefringence and interference of light in the model itself. The described procedure is possible because a laser was used instead of a conventional light source. It applies essentially to the general case where the principal directions vary as a function of time during a transient state of stress and, probably, it may also be used for certain three-dimensional tests. A comparison with theoretical values in an example has proved a rather good accuracy.
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References
Brown, A. F. C., andHickson, W. M., “Improvements in Photoelastic Technique Obtained by the Use of a Photometric Method,”British Journal of Applied Physics,1,1,39 (January 1950).
Schwieger, H. andDietz, H., “Polarisationsoptische Versuche zur elastischen Stosstheorie von B. de Saint-Venant-Flamant,”Annalen der Physik,16,306 (1955).
Pih, H., “Photoelastic Studies of the Two-dimensional Dynamic Stress—Optic Law,”Experimental Mechanics,3,2,33–40 (February 1963).
Schumann, W. andHaenggi, H., “Ueber einen Versuch zur vollständigen Bestimmung zeitlich veränderlicher ebener Spannungszustände mittels eines photoeletrisch-interferometrischen Verfahrens,”Forschung im Ingenieurwesen,30,3,78–85 (1964).
Haenggi, H., “Erweiterung einer photoelektrisch-interferometrischen Methode auf die Messung zeitlich veränderlicher, ebener Spannungszustände,” Dissertation E.T.H., Leeman Zürich (1965).
Durelli, A. J., “Visual Representations of the Kinematics of the Continuums,”Experimental Mechanics.6, 3, 113–138 (March 1966).
Post, D., “A New Photoelastic Interferometer Suitable for Static and Dynamic Measurements,”Proceedings of the Society of Experimental Stress Analysis,XII,1,191–201 (1954).
Nisida, M. andSaito, H., “A New Interferometric Method of Twodimensional Stress Analysis,”Experimental Mechanics,4,12,366–376 (December 1964).
Flynn, P. D., “A Dual-beam Polariscope for Oblique Incidence,”Experimental Mechanics,4,6,182–184 (June 1964).
Fabry, C., “Sur une nouvelle méthode pour l'étude expérimentale des tensions élastiques,”Comptes rendus des séances de l'Académie des sciences,190,3,457–460 (1930).
Favre, H., “Etude théorique de l'influence des réflexions intérieures sur la marche d'un rayon lumineux traversant une lame transparente soumise à des forces agissant dans son plan moyen,”Ingenieur-Archiv,28,1,39–52 (1959).
McIver, R. W., “Structural-test Applications Utilizing Large Continuous Photoelastic Coatings,”,Experimental Mechanics,19A–25A (January 1965) and 19A–26A (February 1965).
Haenggi, H. andSchumann, W., “Sur une application du laser à la détermination des tensions intérieures, variables en fonction du temps,”Comptes rendus des séances de l'Académie des sciences,259,16,2599–2602 (1964).
Drucker, D. C., “The Photoelastic Analysis of Transverse Bending of Plates in the Standard Transmission Polariscope,”Journal of Applied Mechanics,9,4,A161–164 (December 1942).
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Bohler, P., Schumann, W. On the complete determination of dynamic states of stress. Experimental Mechanics 8, 115–121 (1968). https://doi.org/10.1007/BF02326105
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DOI: https://doi.org/10.1007/BF02326105