60. Measurement of stresses in vibrating polymeric films used for Braille elements

L. Gegeckienė1, E. Kibirkštis2, I. Venytė3, A. Voloshin4, K. Ragulskis5, L. Ragulskis6

1, 2, 3Kaunas University of Technology, Kaunas, 51424, Lithuania

4Lehigh University, Bethlehem, Pennsylvania, 18015, USA

5Kaunas University of Technology, Kaunas, 44029, Lithuania

6Vytautas Magnus University, Kaunas, Lithuania

2Corresponding author

E-mail: 1laura.gegeckiene@ktu.lt, 2edmundas.kibirkstis@ktu.lt, 3ingrida.venyte@ktu.lt, 4arkady.voloshin@lehigh.edu, 5kazimieras3@hotmail.com, 6l.ragulskis@if.vdu.lt

(Received 10 October 2014; received in revised form 20 November 2014; accepted 12 December 2014)

Abstract. A separate Braille element is analyzed. Axisymmetric problem for the first harmonic in the circumferential direction is investigated. Maximum equivalent stresses on circles on the boundaries of the structure for the first eigenmodes are obtained. At the places of maximum equivalent stresses deterioration of quality of material of a polymeric film is expected. One dimensional model for the investigation of longitudinal vibrations of polymeric film is used for the determination of number of cycles till start of wear when the film performs vibrations according to the eigenmode. Graphical representations for different values of the parameter of the model are obtained. The results of performed investigations are used in the process of interpretation of measurements of wear of vibrating polymeric films used in the process of printing and production of material with Braille elements.

Keywords: stress measurements, axisymmetric problem, first harmonic, eigenmodes, measurement of number of cycles, wear, polymeric film, one dimensional model, vibrations.

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Cite this article

Gegeckienė L., Kibirkštis E., Venytė I., Voloshin A., Ragulskis K., Ragulskis L. Measurement of stresses in vibrating polymeric films used for Braille elements. Journal of Measurements in Engineering, Vol. 2, Issue 4, 2014, p. 199‑207.

 

Journal of Measurements in Engineering. December 2014, Volume 2, Issue 4
© JVE International Ltd. ISSN Print 2335-2124, ISSN Online 2424-4635, Kaunas, Lithuania