Report on Laminations in Plates - An Acoustical Method for Determination of
Abstract
The following report describes an acoustical method for detecting and locating lamination in steel plates. It is based on the fact that the stiffness of a plate is decreased over a laminated area and the resulting fact that the velocity of flectural waver is decreased across such areas. The pressure of such defective areas is disclosed through sand patterns forced on the surface of the plate when it is vibrated at some resonant frequency. In practice the vibrating forces are applied in a manner that will make the sand patterns on a perfect plate consist of straight parallel lines. Laminated areas are disclosed through distortion of the sand pattern from this simple form.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 07, 1936
- Accession Number
- ADA457275
Entities
Organizations
- United States Naval Research Laboratory