Study of Deformation in a Metal Bar Due to Shockwave Propagation.
Abstract
The work described is aimed at establishing the displacement-time profiles of points on the side and end of a long metal bar when a compression wave travels along its length. The part of the bar to be examined is polished optically flat and is used as one reflector in a conventional two-beam interferometer. The passage of the wave distorts the polished area. The resultant transient fringe pattern representing the distortion in the out-of-plane direction is recorded by high-speed streak photography. From the records obtained graphs of displacement against time can very easily be derived with high resolution. In many cases satisfactory results can be obtained using a small mirror attached to the bar by adhesive, so avoiding the troublesome process of optically polishing part of the surface. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1977
- Accession Number
- ADA060107
Entities
People
- M. P. Wright
Organizations
- Royal Aircraft Establishment