Accession Number:

ADP000011

Title:

Elastic-Plastic Fracture Mechanics Analysis of Small Cracks

Descriptive Note:

Conference paper

Corporate Author:

GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT SCHENECTADY NY

Personal Author(s):

Report Date:

1982-09-01

Pagination or Media Count:

12.0

Abstract:

For many materials the fracture strength and fatigue lifetime is controlled by small cracks that can grow at sizes and applied stress levels which are below those predicted from data for long cracks. The objective of this paper is to describe how elastic-plastic fracture mechanics analysis can be used to interpret small crack behavior. The results of the elastic-plastic analysis indicate that deviations from LEFM begin at about 0.7 of the yield stress and that the trend of the small crack data can be predicted. The results of 3-D elastic-plastic analysis of a surface crack show a unique variation of the crack driving force along the crack front. This information is used to predict crack shapes during cyclic crack growth.

Subject Categories:

  • Metallurgy and Metallography
  • Statistics and Probability
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE