Accession Number:

ADA229733

Title:

An Eccentric Shear-Lag Model and Implications on the Strength of Fibrous composites

Descriptive Note:

Technical rept. 1 Jan-30 Sep 1990,

Corporate Author:

TENNESSEE UNIV KNOXVILLE DEPT OF ENGINEERING SCIENCE AND MECHANICS

Personal Author(s):

Report Date:

1990-11-19

Pagination or Media Count:

29.0

Abstract:

The stress field in the vicinity of a broken fiber-reinforced composite is analyzed by means of a shear-lag model. The broken filament is positioned eccentrically relative to its neighboring fibers to simulate the commonplace non-uniformity of fiber spacing within the transverse plane. It is shown that a fiber break gives rise to severe bending, in addition to tension, in the neighboring fiber - with a substantial overstress focused on the nearest unbroken filament. The complex nature of the stress field, which is caused by the failure of a fiber within the composite casts doubt on the applicability of failure statistics derived from tensile failure data of single fibers to predict the strength of composites. TTL

Subject Categories:

  • Laminates and Composite Materials
  • Operations Research
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE