Issue 38

A. Znaidi et alii, Frattura ed Integrità Strutturale, 38 (2016) 135-140; DOI: 10.3221/IGF-ESIS.38.18

Figure 1 : Identification of the hardening curve :  = 00°.

f

g

h

n’

m

0.137 1.1999 Table 4 : Identification of anisotropic coefficients and a shape coefficient m In Fig. 2 the model (ident) allows us to study the load surface on each test. We note that this material is resistant to simple shear like simple traction. 0.0992 1.4889 3.104

Figure 2 : Evolution of the load surface in the deviatory plan 

 x x 2 3 , .

1,1

0,9

0,7



0,5

0

0,4

0,8

1,2

1,6



Figure 3 : Evolution of the anisotropy.

139