A STUDY OF ELASTOPLASTIC DEFORMATION OF SHELLS WITH OPENINGS AND REINFORCEMENTS BY THE METHOD OF PHOTOELASTIC COVERINGS,
Abstract
Experiments were performed to study the stressed state of cylindrical shells with reinforced and nonreinforced circular, square, and rectangular openings in tension and in torsion. The experimental method used is the one of photoelastic coverings, in which the surface of the shell is covered with a thin covering of an optically active material. Shell deformations under loading are transmitted to the photoelastic covering and are manifested in the covering as the dual wave radiation, which is measured with the aid of a polarization device for reflected light. An equation is given which expresses the relationship of the optical difference of shift with the difference of principal deformations in the covering in the absence of reversals of direction of the principal deformations along the thickness of the covering. Other working equations are developed, the accuracy of this testing method is discussed, and the results are compared with analytical solutions. The limits of applicability of the analytical solutions are established. It is shown that the method developed satisfies the accuracy requirements of the study while also avoiding the series of difficulties and limitations of other known means of polarization-optical studies of shells.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 12, 1967
- Accession Number
- AD0674157
Entities
People
- A. S. Rakin
- A. Ya. Aleksandrov
- M. Kh. Akhmetzyanov
Organizations
- National Air and Space Intelligence Center