EFFECT OF EXPOSURE TIME ON CAVITATION DAMAGE

Abstract

It has been proposed in some recent publications that the cavitation damage rate decreases markedly in solids after long exposure to cavitation. It has also been proposed that this low rate of cavitation damage is the one with physical significance for the solid. These observations have been made with specimens oscillated sinusoidally in liquids by means of magnetostrictive devices. In the observations described here it is shown by means of photographs of the cavitation cloud over such specimens that the reduced damage rate results from the very sparse bubble cloud which is formed over the deeply damaged surface. The change in the damage rate therefore has hydrodynamic origin and is not related to a change in the properties of the solid. X-ray analyses show also that the extent of the plastic deformation of a solid with very light damage is the same as for a solid with very heavy damage.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1965
Accession Number
AD0471191

Entities

People

  • Milton S. Plesset
  • Robert E. Devine

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Body Weight
  • Crystal Structure
  • Diffraction
  • Electropolishing
  • Government Procurement
  • Governments
  • Materials
  • Military Research
  • National Security
  • Photographic Film
  • Photographs
  • Plastic Deformation
  • Polishing
  • United States
  • United States Government
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.