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A study of the effects of repeated tension impact loads upon certain metals used in aircraft construction


Olsen, Carl Baker and Brown, Sheldon Willis (1942) A study of the effects of repeated tension impact loads upon certain metals used in aircraft construction. Engineer's thesis, California Institute of Technology. doi:10.7907/RXJQ-C567.


The repeated tension impact properties of a manganese bronze, used in aircraft landing gear fittings, are presented in this report.

The repeated tension impact test apparatus was adapted to take specimens in the form of sheet as well as specimens of the conventional bar type. With the modified apparatus, data on Alcoa 24 S-T and Dowmetal J-1H sheet specimens of varying thicknesses were obtained in order to present the aircraft designer with information directly applicable to the sheet materials currently in use.

An investigation was made of the effect of service operation on the repeated tension impact properties of three 25 S-T propeller blades. For this purpose, propeller blades were used with approximately 5,314, and 788 hours of service operation.

A new machine, specifically designed for repeated tension impact testing, was placed in commission. With this machine, repeated tension impact test data on 24 S-T bar stock were extended to higher velocity ranges in an effort to determine the effect of velocity of impact.

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
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1942
Record Number:CaltechETD:etd-11072008-100137
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4453
Deposited By: Imported from ETD-db
Deposited On:21 Nov 2008
Last Modified:21 Dec 2019 02:28

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