These values differ from the value β ≅ 1 ̸ 3, which was determined by Sodhi [7]
from similar laboratory tests with longer beams.
In the tests with loading of a short beam (
L
h = 3.8), the flexural cracking and
diagonal cracking due to the shear processes were identified. Video record of the
test and force time history (Fig. 11a) shows that flexural and diagonal cracks were
formed practically simultaneously: two corresponding peak forces are approximately equal to 144 kN. Then, a small shelf can be seen in the force record with a
value of 139 kN when governing force is the ice compression. The beam view after
failure is shown in Fig. 11b.
From the force record and using formula (4) the sea ice shear strength can be
estimated as τ ≅ 0.343 MPa.
View of flexural crack in one
of the fixed end of the beam
View of flexural crack in the middle
Fig. 9 Fracture pattern after the test. Beam #Sea1_L,
L
h = 7.6 (Table 1)
Fig. 10 Fracture pattern after
the test. Beam #Sea2_L,
L
h = 5.5 (Table 1)
Experimental Studies of Sea and Model Ice Fracture Mechanics
601
from similar laboratory tests with longer beams.
In the tests with loading of a short beam (
L
h = 3.8), the flexural cracking and
diagonal cracking due to the shear processes were identified. Video record of the
test and force time history (Fig. 11a) shows that flexural and diagonal cracks were
formed practically simultaneously: two corresponding peak forces are approximately equal to 144 kN. Then, a small shelf can be seen in the force record with a
value of 139 kN when governing force is the ice compression. The beam view after
failure is shown in Fig. 11b.
From the force record and using formula (4) the sea ice shear strength can be
estimated as τ ≅ 0.343 MPa.
View of flexural crack in one
of the fixed end of the beam
View of flexural crack in the middle
Fig. 9 Fracture pattern after the test. Beam #Sea1_L,
L
h = 7.6 (Table 1)
Fig. 10 Fracture pattern after
the test. Beam #Sea2_L,
L
h = 5.5 (Table 1)
Experimental Studies of Sea and Model Ice Fracture Mechanics
601