Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-14T22:41:34.911Z Has data issue: false hasContentIssue false
  • English
  • Français

Stress concentration factors in countersunk holes

Published online by Cambridge University Press:  04 July 2016

J. B. Young  and
K. K. Lee
J. B. Young
Affiliation:
College of Aeronautics, Cranfield University
K. K. Lee
Affiliation:
College of Aeronautics, Cranfield University
Get access Rights & Permissions [Opens in a new window]

Extract

The use of finite element analysis in the modelling of an unloaded countersunk hole revealed that there is a consistent relationship between the maximum stress concentration factor and the design parameters of the hole — countersunk depth, edge distance, t/d ratio and countersunk angle. It has been shown that countersunk depth and edge distance have a strong influence on the Kt value while the t/d ratio has a lesser effect. Variation of countersunk angles between 90° and 110° was found to have a negligible influence on the maximum Kt values.

It has also been shown that normalising the stress concentration factors of a countersunk hole by dividing the Ktvalues at various countersunk depths by the Ktvalues for a plain hole of similar configuration, enables the stress concentration factors in a countersunk hole to be determined from values in a plain hole. This is very useful since extensive work had been done on stress concentration factors for a plain hole and data are therefore more commonly available.

Type
Research Article
Information
The Aeronautical Journal , Volume 97 , Issue 968 , October 1993 , pp. 267 - 276
Copyright
Copyright © Royal Aeronautical Society 1993 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Wharley, R.E. Stress concentration factors for countersunk holes, Expt Mech, Aug 1965, pp 257–261.Google Scholar
2. Cheng, Y.F. Stress-concentration factors for a countersunk hole in a flat bar in tension and transverse bending. J Appl Mech, December 1978, 45, pp 929–932.Google Scholar
3. Pridham, B.J. Stress Concentration Factors for a Countersunk Hole in a Plate in Uniaxial Tension, RFT 824/Z/179, ATN2413, Mechanical Test Department, BAe Warton.Google Scholar
4. Sternberg, E. and Sadowsky, M.A. Three dimensional solution for the stress concentration around a circular hole in a plate of arbitrary thickness, ASME J Appl Mech, March 1949, 16, (1), pp 27–38.Google Scholar
5. Chong, K.P. and Pinter, W.J. Stress Concentrations of tensile strips with large holes, Comp Struct, 1984, 19, (4), pp 583–589.Google Scholar
6. Peterson, R.E. Stress Concentration Design Factors, John Wiley, 1953 p 78 and p 86.Google Scholar
7. Carre, C.H.E. Determination by finite element method of the stress concentration factors in countersunk hole in metal, Cranfield Institute of Technology, MSc thesis, September 1991 Google Scholar