Strain Measurement in Local Volume by Non-Contact Videoextensometric Technique on Ultra High Strength Steels

Abstract:

The paper presents the results of strain measurement using two methods: videoextensometry (ME46) and digital image correlation (DIC)-ARAMIS. ME46 - allows measuring and monitoring the major and minor strain on a planar surface of a loaded object [1]. Experimental equipment uses a CCD camera for monitoring the process. The software calculates the displacements of contrast dots and subsequently the strain components are obtained. Another method for non-contact measurements is DIC technique; the measurements are done using three-dimensional image correlation system. The system uses two digital high-speed cameras providing a synchronized stereo view of the specimen where speckles are arranged on the surface. The results show the complete strain field during the tests, including details of the strain field when necking develops prior to the failure [2]. Experimental results obtained on ultra high strength automotive steels DP 1000 and 1400M grades during static tensile test are presented in the paper. The outputs of both are deformation maps. Advantages and disadvantages of both methods are compared.

• Periodical: Key Engineering Materials (Volume 586)
• Pages: 129-132
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.586.129
• Online since: September 2013
• Authors: Stanislava Hlebová, Ľubomír Ambriško, Ladislav Pešek
• Keywords: Deformation, DIC Method-Aramis, Non-Contact Strain Measurement, Ultra High Strength Steel, Videoextensometry

References

[1] E. Spišák, J. Slota, J. Majerníková, Ľ. Kaščák, P. Malega, Chemické listy 106 (2012) 537-540.

[2] Ľ. Ambriško, L. Pešek, Acta Metallurgica Slovaca 15 (2009) 105-111.

[3] M.M. LeBlanc, J.N. Florando, et al., Experimental Techniques 30 (2006) 13-61.

[4] V. Tiwari, M.A. Sutton et al., International Journal of Impact Engineering 36 (2009) 862-874.

[5] M. Al Ali et al., Procedia Engineering 40 (2012) 8-13.