Accession Number:

ADA151799

Title:

Initiation, Growth, and Coalescence of Small Fatigue Cracks.

Descriptive Note:

Annual rept. 15 Jan 83-14 Jan 84,

Corporate Author:

PURDUE UNIV LAFAYETTE IN SCHOOL OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s):

• Grandt,A. F. , Jr

Report Date:

1984-05-01

Pagination or Media Count:

63.0

Abstract:

This interim report summarizes the second years progress on a research effort directed at studying the initiation, growth, and coalescence of small fatigue cracks at notches. A fracture mechanics based model is described to predict the growth and coalescence of multiple cracks located at notches. The predictive model is compared with experimental results obtained with multiple cracked specimens made from a transparent polymer and for metal specimens. Current efforts and future goals are also briefly described. Author

Descriptors:

• *CRACKS
• *FATIGUE(MECHANICS)
• MATHEMATICAL MODELS
• CRACKING(FRACTURING)
• COALESCENCE
• CRACK PROPAGATION
• NOTCH SENSITIVITY

Subject Categories:

• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE