Accession Number:

ADA063796

Title:

Representation of Matrix/Interface-Controlled Strength of Unidirectional Composites.

Descriptive Note:

Final rept. 1 May 76-31 Dec 77,

Corporate Author:

AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1978-08-01

Pagination or Media Count:

38.0

Abstract:

The report presents a method of characterizing the matrixinterface-controlled strength, including scatter, of unidirectional composites under combined loading. The failure envelope is represented by a second order polynomial and the scatter is described by the strength vector whose magnitude has a Weibull distriubtion. The method is based on the assumption of failure originating at inherent cracks parallel to the fibers and holds promise as a means of accounting for the size effect under combined loading. In addition, the energy release rate approach is discussed as a physical model and the appropriate data are presented. Author

Subject Categories:

  • Laminates and Composite Materials
  • Statistics and Probability
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE