VARIATION OF THE ICE STRUCTURE IN THE ZONE OF IMPACT OF A SOLID BODY AGAINST THE ICE COVER SURFACE

This article contains the results of an experimental study of the structure of ice before and after a solid body in the form of a spherical steel casting weighing 300 kg dropped from different altitudes by means of a portable drop hammer strikes against it. The experiments were performed both at low temperatures (minus 20, minus 30 degrees) and at high temperatures (plus 2, plus 5 degrees). As a result, it was discovered that before impact it is possible to isolate three characteristic layers with respect to the thickness of the ice depending on the shape and magnitude of the ice bubbles and the air bubbles. After impact three layers are also distinguished. The upper layer is characterized by solid crushing and melting of the ice, the middle layer is characterized by a large number of cracks having different directions, and the lower layer, by the presence of cracks only in the radial direction. In the opinion of the authors, the most significant change in structure of the ice on impact is the formation of a zone of finely dispersed ice separated from the basic mass by a clearly expressed rupture surface.

• Corporate Authors:

  Gidrometoizdat Press

  Leningrad,   USSR 
• Authors:
  • Kheysin, D Y
  • Cherepanov, N V
• Publication Date: 1970

Media Info

• Pagination: p. 79-84
• Serial:
  • Problems of the Arctic and Antarctic
  • Publisher: Gidrometoizdat Press

Subject/Index Terms

• TRT Terms: Ice; Ice phenomena; Icebreaking; Impact loads; Physical properties
• Uncontrolled Terms: Ice properties
• Old TRIS Terms: Ice characteristics
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Materials;

Filing Info

• Accession Number: 00024793
• Record Type: Publication
• Source Agency: Joint Publications Research Service
• Files: TRIS
• Created Date: Jan 14 1972 12:00AM