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1 Acta Mechanica et Automatica

1 2012

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Numerical-Experimental Analysis of Plastic Flow Beginning Phase Round the Hole in the Thin Shield Under Tension

Bućko S., Jodłowski H., Trzebicki M.

Acta Mechanica et Automatica

2012

Vol. 6, no. 1

21-25

The method of recognition of plastic strains with the use of optical interference was characterized in the work. The idea of the method was shown on the example test for 15HM steel tension. The results of experimental testing of plastic strains initiation in the thin shield with opening of O20 diameter under tension, especially considering round the hole zone were presented in further part of the work. The experiment was carried out with the use of method mentioned above. In the experiment the stresses initializing plastic deformations and the shape of plastic zone were determined. The stress state analysis in the hole zone in the specimen under tension was realized with the use of finite element method. The calculations were done for two significantly different hole diameters. The results of FEM calculations allow for certification that for the holes of diameters significantly bigger than the shield thickness round the hole plane stress state occurs.