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Fatigue Stress Concentration Studies on Aluminum Alloys


Dervishyan, Aram Ohannes (1952) Fatigue Stress Concentration Studies on Aluminum Alloys. Engineer's thesis, California Institute of Technology. doi:10.7907/4BCE-M652.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. Fatigue tests in reversed bending were conducted in 75S-T6 and 17S-T6 aluminum alloys to determine whether Neuber's theory on fatigue stress concentration factors in notches was applicable to these materials. The results of the tests indicate confirmation of the theory within engineering accuracy providing the value of […] (a material constant) is determined experimentally. Material size effect was investigated and found to exist. This was an unexpected result since other sources (see References 3 and 4) indicated that no size effect existed for aluminum alloys. Ignoring the correction due to size effect a value of the Neuber's constant […] of approximately 0.05" gave reasonable checks with the experimental data for both 75S-T6 and 17S-T6 aluminum alloys. This may indicate that this value of […] is the correct material constant for aluminum alloys but additional data on other alloys is needed to confirm this conclusion.

Item Type:Thesis (Engineer's thesis)
Subject Keywords:Aeronautical Engineering
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Sechler, Ernest Edwin (advisor)
  • Hudson, Donald E. (advisor)
  • Williams, Max L. (advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1952
Record Number:CaltechETD:etd-03232009-161109
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1082
Deposited By: Imported from ETD-db
Deposited On:24 Mar 2009
Last Modified:10 May 2023 23:36

Thesis Files

PDF (Dervishyan_ao_1952.pdf) - Final Version
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