NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Analysis of cold worked holes for structural life extensionCold working holes for improved fatigue life of fastener holes are widely used on aircraft. This paper presents methods used by the authors to determine the percent of cold working to be applied and to analyze fatigue crack growth of cold worked fastener holes. An elastic, perfectly-plastic analysis of a thick-walled tube is used to determine the stress field during the cold working process and the residual stress field after the process is completed. The results of the elastic/plastic analysis are used to determine the amount of cold working to apply to a hole. The residual stress field is then used to perform damage tolerance analysis of a crack growing out of a cold worked fastener hole. This analysis method is easily implemented in existing crack growth computer codes so that the cold worked holes can be used to extend the structural life of aircraft. Analytical results are compared to test data where appropriate.
Document ID
19950013077
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wieland, David H. (Southwest Research Inst. San Antonio, TX, United States)
Cutshall, Jon T. (Southwest Research Inst. San Antonio, TX, United States)
Burnside, O. Hal (Southwest Research Inst. San Antonio, TX, United States)
Cardinal, Joseph W. (Southwest Research Inst. San Antonio, TX, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1994
Publication Information
Publication: NASA. Langley Research Center, FAA(NASA International Symposium on Advanced Structural Integrity Methods for Airframe Durability and Damage Tolerance, Part 2
Subject Category
Structural Mechanics
Accession Number
95N19493
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available