Accession Number:

ADA090698

Title:

Benefits of Overload for Fatigue Cracking at a Notch

Descriptive Note:

Technical rept.

Corporate Author:

ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER WEAPON SYSTEMS LAB

Personal Author(s):

• Underwood, J. H.
• Kapp, J. A.

Report Date:

1980-05-01

Pagination or Media Count:

30.0

Abstract:

Tests are described which measure the effect of compression overload on fatigue crack initiation and growth from a 0.1 mm radius notch in alloy steel KIc specimens. Other tests are described which measure the effect of tension overload on fatigue crack initiation and growth from a 3.4 mm root radius notch in similar specimens. The effect of overload on the number of cycles required for crack growth is described for both types of tests in relation to a residual stress model.

Descriptors:

• *CRACKING(FRACTURING)
• *CRACKS
• *FATIGUE(MECHANICS)
• *NOTCH TOUGHNESS
• *OVERLOAD
• *STEEL
• CRACK PROPAGATION
• FRACTURE(MECHANICS)
• MODELS
• RESIDUAL STRESS
• STATISTICAL ANALYSIS
• TOUGHNESS

Subject Categories:

• Metallurgy and Metallography
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE