Columnar Model Ice
The tests of the columnar model ice beams have shown three typical patterns of the
beam failure depending on the relative lengths of the beams: failure pattern of long
beam (
L
h = 6.7Þ featured flexural cracks (Fig. 15a); medium length beams (
L
h = 4.9
and
L
h = 3.3) showed a combination of cracking types: flexural crack at a fixed end
Initial stage of penetration of
indenter
Time moment: 15.5 sec
Indentation process
Time moment: 17.7 s
Flexural cracks in mid-section
and in cornes
Time moment: 18.1 s
Fig. 12 Loading and failure of beam #FG3
Fig. 13 Time history of force. Beam #FG3
Experimental Studies of Sea and Model Ice Fracture Mechanics
603
The tests of the columnar model ice beams have shown three typical patterns of the
beam failure depending on the relative lengths of the beams: failure pattern of long
beam (
L
h = 6.7Þ featured flexural cracks (Fig. 15a); medium length beams (
L
h = 4.9
and
L
h = 3.3) showed a combination of cracking types: flexural crack at a fixed end
Initial stage of penetration of
indenter
Time moment: 15.5 sec
Indentation process
Time moment: 17.7 s
Flexural cracks in mid-section
and in cornes
Time moment: 18.1 s
Fig. 12 Loading and failure of beam #FG3
Fig. 13 Time history of force. Beam #FG3
Experimental Studies of Sea and Model Ice Fracture Mechanics
603