Liquid Impact Erosion Mechanisms in Transparent Materials.

Abstract

This project has been concerned with developing techniques for the study of liquid impact, with studying the behaviour of various infra-red transparent solids and with analytic work on hard coatings. Damage has been assessed quantitatively by measuring the 'residual' strength after impact and plotting strength against velocity. Section 2 of this report describes an analysis of residual strength curves. The comparison between the analytic predictions and the experimental curves is good. Sections 3 and 4 describe the results of finite element analysis for the case of (i) Hertzian and (ii) uniform pressure loading of substrates with a hard coating. The protection offered by the coating is examined in terms of the elastic properties of the coating and its thickness. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1982
Accession Number
ADA114018

Entities

People

  • John Edwin Field
  • S. Van Der Zwaag

Organizations

  • University of Cambridge

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • C4I
  • Space

DTIC Thesaurus Topics

  • Coatings
  • Composite Structures
  • Elastic Properties
  • Failure Mode And Effect Analysis
  • Finite Element Analysis
  • Impact Strength
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Modulus Of Elasticity
  • Pressure Distribution
  • Protective Coatings
  • Radial Stress
  • Rayleigh Waves
  • Stress Waves
  • Stresses
  • Substrates

Fields of Study

  • Materials science

Readers

  • Surface Engineering/Surface Coating Technology.
  • Theoretical Analysis.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).