METHOD OF DETECTING SEPARATION AND DEFECTIVE BONDING BETWEEN THE ELEMENTS OF MULTILAYER SANDWICH STRUCTURES,
Abstract
The object of the invention is a method of detecting the separation of layers and zones of breakdown of the bonds between the elements of multilayer constructions, for example, of nonmetallic and combined metallic and nonmetallic materials, based on the use of Lamb's wave. For the purpose of eliminating the random oscillations in amplitude unavoidable in the control, the defects are revealed through the change in the speed of the propagation of the wave, a change which can be evaluated in accordance with the amount of the phase shift in the oscillations in the object between the point of origin and the point of reception which are located at a fixed distance one from the other. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 29, 1965
- Accession Number
- AD0620998
Entities
People
- Yu. V. Lange
Organizations
- National Air and Space Intelligence Center