PSI - Issue 13

W. Teraud / Procedia Structural Integrity 13 (2018) 238–242 Teraud W. / Structural Integrity Procedia 00 (2018) 000–000

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well as a camera lens NIKKOR 80-200 mm and an extension ring 12 mm. All calculations were made on a server station Intel Xeon. An own-produced CNC-machine was used to apply marks onto specimen. The use of the developed method to measure high-temperature stretch of specimen made it possible to experimentally determine parameters of formation and development of a neck at a specimen in the course of deformation for the first time. One managed to show that uniform deformation takes place only during 30 – 50 % of a time to fracture; after that deformation exhibits significant non-uniformity. The use of the method to measure deformation of cylinders subject to pressing showed proper conformity of theoretical and experimental characteristics of deformed condition. 4. Conclusion Facility has been designed and produced capable, by use the optical method, to measure changes to geometry parameters of specimen during high-temperature deformations. The system makes it possible to increase a number of parameters subject to measurement during an experiment by several times that considerably improves reliability of a comparative analysis with theoretical calculations. Acknowledgements The reported study was funded by RFBR according to the research project No. 16-38-60200 and 17-08-00210. References 1. Klokov, N., 1990. Strain gauges. Moscow, Machinostroenie, pp. 230. 2. Non-Contact Digital Video Extensometer. Link: https://www.shimadzu.com/an/test/universal/1_trviewx.html. Last access 20.05.2018. 3. Kazakov, D., Zhegalov, D. 2007. Using digital photography techniques for studying strain fields. Journal Problemi prochnosti i plastichnosti. Vol. 69, 99-105. (In Russian). 4. Granovsky, V., Orlenkov, I., Podymaka, N. Intellectual Property: Patents «The method for determining the microdeformations of a sample» RU2011160. Link: http://www1.fips.ru/fips_servl/fips_servlet?DB=RUPAT&DocNumber=2011160&TypeFile=html. Last access 20.05.2018. 5. Poklad, V., Stepniakov, V., Akhmetdinov, R. and etc. Intellectual Property: Patents «Method for measuring the shape of an object and the device for its implementation». RU2256878. Link: http://www1.fips.ru/fips_servl/fips_servlet?DB=RUPAT&DocNumber=2256878&TypeFile=html. Last access 20.05.2018. 6. Charles, W. Intellectual Property: Patents «Optical radius gauge». US5090811. Link: https://patents.google.com/patent/US5090811A/en?oq=%C2%BB+US5090811. Last access 20.05.2018. 7. Krasilnikov, V., Yerilin, E., Vogel, A. Intellectual Property: Patents «Method of checking the diameters of a part». RU2301968. Link: http://www1.fips.ru/fips_servl/fips_servlet?DB=RUPAT&DocNumber=2301968&TypeFile=html. Last access 20.05.2018. 8. Veronika, Sh., Vadim, A., Vladimir, B., Andrei A., etc. Intellectual Property: Patents «Structured-light, triangulation-based three-dimensional digitizer». WO9958930. Link: https://patents.google.com/patent/WO1999058930A1/ru. Last access 20.05.2018. 9. Sivokhin, A., Kuznetsov, A. Intellectual Property: Patents «The method of optical measurement of the shape of a surface». RU2448323 Link: http://www1.fips.ru/fips_servl/fips_servlet?DB=RUPAT&DocNumber=2448323&TypeFile=html. Last access 20.05.2018. 10. Klimov, A., Sukhovey, S., Yukhin, A. Intellectual Property: Patents «The method of non-contact control of linear dimensions of three dimensional objects». RU2185598. http://www1.fips.ru/fips_servl/fips_servlet?DB=RUPAT&DocNumber=2185598&TypeFile=html. Last access 20.05.2018. 11. Tretyakova, Т. 2014. Features of the use of Vic-3D software that implements the method of correlation of digital images in application to the study of inelastic deformation fields. Journal of Computational Mechanics of Continuous Media 7, No. 2, 162-171. 12. Digital image correlation and tracking. Link: https://en.wikipedia.org/wiki/Digital_image_correlation_and_tracking. Last access 20.05.2018. 13. Grossnickle, J., Pillers, J.; Mccrary, K. Intellectual Property: Patents «Multiple-Scale Digital Image Correlation Pattern and Measurement». US2014160279. Link: https://worldwide.espacenet.com/publicationDetails/biblio?CC=EP&NR=2741071A1&KC=A1&date=&FT=D&locale=en_EP. Last access 20.05.2018. 14. Teraud, W. 2017. Localization of the Creep in Rectangular Samples at High Temperature. Journal Russian Engineering Research 37, No. 10, 850–856.