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KEY WORDS

strain fields, stress fields, virtual fields method, finite element method.

ABSTRACT

The article is focused on identification the stress fields related to strain fields by using digital image correlation (DIC) and to verify the results obtained using the finite
element method (FEM). Particular attention is devoted to the analysis of deformation in area of stress concentration (near notch). The virtual field method is using to determine the stress fields connected with displacement fields, which was elaborated for analysis of an elasto plastic deformation by Grédiac and Pierron. These procedures are applied to determine the properties of cold rolled steel used for automobile industry. For analysis was used uncoated sheet of isotropic steel with higher strength properties.

CITATION INFORMATION

Acta Mechanica Slovaca. Volume 16, Issue 2, Pages 38 – 43, ISSN 1335-2393

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  Analysis of Stress Fields Relate to Plastic Deformation of the Steel Sheets

REFERENCES

[1] Šimčák F., Berinštet V., Štamborská M.: Some possibilities of determination of yield conditions for cold rolled steel sheets - 2010. In: Acta Mechanica Slovaca. Vol. 14, no. 4, p.

28-35. ISSN 1335-2393
[2] Härkegård, G. - Mann, T.: Neuber Prediction Of Elastic-Plastic Strain Concentration In Notched Tensile Specimens Under Large-Scale Yielding, Department Of Machine Design And Materials Technology, Norwegian University Of Science And Technology, Trondheim, Norway, J. Strain Analysis, Vol.38 No. 1 S02702 © Imeche 2003.
[3] Fillipini, M.: “Stress Gradient Calculations At Notches,” International Journal Of Fatigue, Vol. 22(5), Pp. 397-409, 2000.
[4] Strang, G. - Fix, G.J.: An Analysis Of The Finite Element Method. Automatic Computation. Prentice-Hall, New Jersey,1973.
[5] Trebuňa, F. - Šimčák, F.: Príručka experimentálnej mechaniky, Košice 2007, Isbn 970-80-8073-816-7.

[6] Pierron, F. - Grédiac M.: The Virtual Fields Method. Springer, June 29, 2011.
[7] http://pdf.directindustry.com/pdf/instron/8801-fatiguetesting-systems/18463-138042-_8.html#
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[9] Avril, S. - Grédiac, M. - Pierron, F.: Sensitivity Of The Virtual Fields Method To Noisy Data. Comput. Mech., 34(6):439-452, 2004.
[10] Grédiac, M. - Pierron, F.: Applying The Virtual Fields Method To The Identification Of Elasto-Plastic Constitutive Parameters. Int. J. Plasticity, 22:602-627, 2006.
[11] Sutton, M.A. - Deng, X. - Liu, J. - Yang, L.: Determination of Elastic-Plastic Stresses And Strains From Measured Surface Strain Data. Experimental Mechanics, 36(2):99–112, 1996.
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[13] Swift, H.W.: “Plastic Instability Under Plane Stress”, Journal Of The Mechanics And Physics Of Solids, Vol. 1, 1952, Pp. 1-18.
[14] Wang, J. - Levkovitch, V. - Reusch, F. - Svendsen, B.: Modeling And Simulation Of Directional Hardening In Metals During Non-Proportional Loading; Journal Of Materials Processing Technology 176, 2006, 430–432.

Latest Issue

ams 2 2016

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