Accession Number:

ADA114262

Title:

Durability Methods Development. Volume 2. Durability Analysis: State- of-the-Art Assessment

Descriptive Note:

Final technical rept. Apr 1978-Jun 1979 on Phase 1

Corporate Author:

GENERAL DYNAMICS FORT WORTH TX FORT WORTH DIV

Personal Author(s):

• Manning, S. D.
• Flanders, M. A.
• Garver, W. R.
• Kim, Y. H.

Report Date:

1979-09-01

Pagination or Media Count:

40.0

Abstract:

A critical evaluation of three analytical approaches is made to determine their applicability andor potential for analytically assuring airframe durability during the design stage. A suitable analytical format for quantifying durability damage is developed based on U.S. Air Force durability design specifications and durability analysis needs. Air Force durability requirements are briefly reviewed and discussed. Three potential approaches for durability damage analysis are conceptually evaluated and discussed 1 Conventional Fatigue Analysis Palmgren-Miner Rule 2 Deterministic Crack Growth Approach and 3 Probabilistic Crack Growth Approach. The resulting evaluation provides the prerequisite work needed to develop a durability analysis methodology. The probabilistic crack growth approach is found to be the most promising for developing the durability analysis methodology under Phase 1.

Descriptors:

• *ENDURANCE(GENERAL)
• *AIRFRAMES
• DAMAGE
• TIME DEPENDENCE
• DEFECTS(MATERIALS)
• FATIGUE(MECHANICS)
• FASTENINGS
• CONFIDENCE LEVEL
• STATISTICAL DISTRIBUTIONS
• HOLES(OPENINGS)
• MATHEMATICAL PREDICTION
• CRACK PROPAGATION
• STRUCTURAL PROPERTIES

Subject Categories:

• Aircraft
• Statistics and Probability
• Manufacturing and Industrial Engineering and Control of Production Systems
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE