Accession Number:

AD0735434

Title:

Long-Term Strength of Anisotropic Composite Materials under Plane Stress State (Dlitelnaya Prochnost Anizotropnykh Plastmass v Ploskom Napryazhennom),

Descriptive Note:

Corporate Author:

ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA

Personal Author(s):

Report Date:

1971-10-21

Pagination or Media Count:

9.0

Abstract:

The long-term strength of anisotropic composite materials textolites, fiber glass, etc. under plane stress is considered. A criterion of strength generalizing the criterion of short-term strength for such materials is proposed. The theoretical results are illustrated in the case of glassbase textolites with a polyester binder. The long-term resistance limit of this material after 100, 500, 1,000 and 10,000 workload hours is defined. In the studies of the short-term strength criterion of a number of technical materials with an ortho-gonal anisotropy of mechanical properties textolites, layered pulp plastics, glass-base textolites, plywood, etc. the author proposes a short-term strength criterion for complex cases of stress. The criterion is based on the widely assumed validity of modeling a layered medium by the use of a homogeneous elastic anisotropic medium. Author, modified-PL

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE