Rain and Solid Particle Erosion Damage Mechanisms and Materials Evaluations
Abstract
In the initial stage of liquid impact, high pressures are developed due to compressible behaviour of the liquid. This is followed by the release of liquid in the form of high speed jets. Studies of these processes in millimeter sized spherical drops is complicated. Some features are best studied using liquid shapes other than a sphere. Sec. II describes techniques using water/gelatine layers. The gel is cut into shape and fired by a gas gun. This is viewed by high speed camera. Results are given for the shock structures, conditions, jetting and target impedance on impact. Sec. III describes methods developed for controlled single impacts. Reasonably accurate results are obtained and methods for quanitative assessment are provided. Methods for improving accuracy are provided. Sec IV provides an analysis of double layer gel particals with different elastic properties. Sec V give novel methods of recording properties at strain rates of ca. 2 x 10 to the 4th/s. Data for a range of polymers is given.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1986
- Accession Number
- ADA259783
Entities
People
- D. Townsend
- J. P. Dear
- S. M. Walley
- S. Van Der Zwaag
Organizations
- University of Cambridge