Interference-Fit-Fastener Investigation

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Abstract:

The report presents analytical and experimental techniques for defining the stress-strain and deformation states around holes filled with tapered shank interference fit fasteners. A prescription for fatigue-life analysis and prediction is developed wherein the above noted data are used. Stresses and plastic strains around fastener holes are determined analytically for two- and three-dimensional elastic and elastic-plastic cases using AXISOL and MARC computer codes. These results are evaluated based on data obtained from the dislocation etching technique, speckle photography experiments, and electrical resistance strain gages. A fatigue analysis technique is developed based on 1 a mechanics analysis to estimate local stress and strain and 2 a calculation of fatigue damage. This analysis provides a good estimate of life to crack initiation. Fastener installation variables are studied and critical ones selected. Constant amplitude and spectrum loading fatigue tests are reported and the data used to verify fatigue life predictions.

Author(s):
Ford, Stephen C. ; Leis, B. N. ; Utah, D. A. ; Griffith, W. ; Sampath, S. G.
Author Organization(s):
BATTELLE COLUMBUS DIV OH
Descriptive Note:
Final rept. 26 Mar 1973-30 Jun 1774
Pagination:
0179

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited. Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFFDL-TR-75-93
Contract/Grant Number(s):
F33615-73-C-3121
Task Number(s):
146702
Project Number(s):
AF-1467
Monitor Series:
TR-75-93, AFFDL
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_5.3.3_Develop Strategy; JCA_5.3.4_Develop Courses of Action; JCA_5.3.5_Analyze Courses of Action; JCA_5.2_Understand; JCA_5.2.2_Develop Knowledge and Situational Awareness; JCA_1.2.5_Lessons Learned; JCA_1.2.7_Experimentation; JCA_5.1.1_Establish and Maintain Unity of Effort with Mission Partners; JCA_5.1_Organize; JCA_1.2.6_Concepts; JCA_1.3.2_Personnel Management; JCA_5.5.2_Task; JCA_5.5_Direct; JCA_4.5.4_Requirements Definition; JCA_4.5_Operational Contract Support; JCA_4.6_Engineering
Modernization Areas:
Microelectronics; Quantum Science and Computing
Communities of Interest:
Air Platforms
Descriptor(s):
*FASTENINGS, FATIGUE LIFE, STRESS ANALYSIS, ALUMINUM ALLOYS, FINITE ELEMENT ANALYSIS, COMPUTER APPLICATIONS, FATIGUE(MECHANICS), IRON ALLOYS
Field(s)/Group(s):
Couplers, Fasteners and Joints
Keyword(s):
*FASTENERS, *INTERFERENCE FIT FASTENERS, IRON ALLOY 3SI, AXISOL COMPUTER CODE, MARC COMPUTER CODE, ALUMINUM ALLOY 7075
Report Date:
1975 Sep 01