Accession Number:

ADA183599

Title:

Fatigue Life Prediction in Thick-Walled Cylinders with Complex Residual Stresses

Descriptive Note:

Final rept.

Corporate Author:

ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET WEAPONS LAB

Personal Author(s):

• Pu, S. L.
• Chen, P. C.

Report Date:

1987-07-01

Pagination or Media Count:

26.0

Abstract:

The large variation in stress intensity factors corresponding to various material models for a single, radial, straight-fronted crack in a pressurized, partially autofrettaged cylinder leads to a drastic difference in the fatigue life predictions. None of the predicted lives agree with experimental results. Possible explanations of the discrepancy are given and corresponding correction factors are introduced. The predicted lives based on ther corrected stress intensity ranges are reasonably close to a set of well- documented experimental results of Throop and Fujczak. Keywords Fatigue life, Radial crack, Thick-walled cylinder, Stress-intensity range, Shape factors, Negative K-Factor.

Descriptors:

• *FATIGUE LIFE
• *CRACKS
• *RESIDUAL STRESS
• *AUTOFRETTAGE
• STRESSES
• STRESS ANALYSIS
• PREDICTIONS
• MODELS
• MATERIALS
• SHAPE
• INTENSITY
• STEEL
• VARIATIONS
• MATHEMATICAL PREDICTION
• CYLINDRICAL BODIES
• PRESSURIZATION
• CORRECTIONS
• RADIAL STRESS
• THICK WALLS

Subject Categories:

• Guns
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE