Accession Number:

ADA155926

Title:

On Size Effects in Plane Stress Crack-Growth Resistance,

Descriptive Note:

Corporate Author:

HARVARD UNIV CAMBRIDGE MA DIV OF APPLIED SCIENCES

Personal Author(s):

Report Date:

1985-04-01

Pagination or Media Count:

9.0

Abstract:

For a ductile material, the tearing resistance curve represented by the dependence of the fracture parameter J on crack extension deltaa is a material property only for the small-scale yielding conditions that are approached for very large specimen size. In this paper the influence of size on crack-growth resistance is studied theoretically for single-edge-notch SEN specimens of ideally-plastic materials in plane stress. The calculations are based on the Dugdale model in conjunction with a crack-growth criterion defined by and invariant crack-opening shape. Over a large range of specimen sizes, results are exhibited for materials having low-to-moderate values of initial tearing resistance.

Subject Categories:

  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE