Accession Number:

ADA135891

Title:

Liquid Impact Erosion Mechanisms in Transparent Materials.

Descriptive Note:

Final rept. 30 Sep 80-31 Mar 83,

Corporate Author:

CAMBRIDGE UNIV (ENGLAND) CAVENDISH LAB

Report Date:

1983-10-01

Pagination or Media Count:

82.0

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 with analytic work on hard coatings and with basic studies of liquidsolid impact. Damage has been assessed quantitatively by measuring the residual strength after impact and plotting strength against velocity 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. Section 2 reviews our recent liquid impact damage studies. Section 3 describes a study of the effect of thin coatings on the damage to brittle materials due to static and dynamic loading. Section 4 describes our basic work on liquidsolid impact in which techniques were developed for producing impacts of a solid with two-dimensional liquid shapes. This geometry allowed processes occurring inside the liquid to be followed in detail using high-speed photography. This section also contains an analytic model for the early stage of jet formation.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Coatings, Colorants and Finishes
  • Infrared Detection and Detectors
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE