Accession Number:

ADA149827

Title:

Boundary Elements for Debond Stress Analysis; Fracture Mechanics Stress Analysis.

Descriptive Note:

Final rept. 1 Mar 82-28 Feb 83,

Corporate Author:

IMPERIAL COLL OF SCIENCE AND TECHNOLOGY LONDON (ENGLAND) DEPT OF MATHEMATICS

Personal Author(s):

Report Date:

1983-04-26

Pagination or Media Count:

82.0

Abstract:

To understand and quantify debonding events in composite materials it is necessary to have accurate stress analysis in the area of stress concentrators. Boundary integral equation BIE techniques are proposed as a potentially more accurate approach than finite elements. In particular, the debond stress analysis of a rod being pulled out of a matrix material is considered. A model problem is posed consisting of an edge cracked bar under longitudinal shear deformation and a BIE formulation is proposed using a subtraction of singularity technique. An extensive review of integral equation approaches to various fracture mechanics problems is also presented, with suggested new solution techniques for unsymmetric crack configurations. Originator-supplied keywords include Boundary integral equations, Boundary elements, Boundary element methods, Fracture mechanics, Stress singularities.

Subject Categories:

  • Laminates and Composite Materials
  • Numerical Mathematics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE