Question: For the data shown in Fig. 12.5(a), what is (a) The principal stress difference (b) The principal stress ratio at an axial strain of 12%

For the data shown in Fig. 12.5(a), what is

(a) The principal stress difference

(b) The principal stress ratio at an axial strain of 12% for an effective confining pressure of 1.3 MPa?

4.0 Lo-0.1. 0.2 D0.3 0.44 1.3 2.0 2.9- 3.9 13.7 3.0 2.0 All samples loose ec = 0.87, D, = 38% 7.8 aác (MPa) 1.0 10 15 2

4.0 Lo-0.1. 0.2 D0.3 0.44 1.3 2.0 2.9- 3.9 13.7 3.0 2.0 All samples loose ec = 0.87, D, = 38% 7.8 ac (MPa) 1.0 10 15 20 25 30 35 40 Axial strain, (%) Principal stress ratio

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