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A Study of "Shear Lag" Phenomenon in a Stiffened Flat Panel by Photoelastic Methods


Fan, Hsu-Tsi (1939) A Study of "Shear Lag" Phenomenon in a Stiffened Flat Panel by Photoelastic Methods. Master's thesis, California Institute of Technology. doi:10.7907/WANC-TP12.


In the construction of modern metal airplanes there are many locations where a more or less concentrated load is transferred to a large area of material. Therefore the design-engineer is frequently confronted with the problem of “shear lag.” This problem can be treated in a few simple cases by the mathematical theory of elasticity, especially by Airy’s stress functions, but in many other cases, in order to avoid mathematical complexities, certain assumptions must be made which will simplify the analytical solution of the problem. These assumptions usually do not agree with the actual conditions therefore the results are not adequate. By the photoelastic method, however, the results obtained by the mathematical theory can be checked. It is the purpose of this experiment to check the results which have been obtained by the theoretical investigation for a few simple cases.

Item Type:Thesis (Master's thesis)
Subject Keywords:Aeronautics
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • von Kármán, Theodore (advisor)
  • Sechler, Ernest Edwin (advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1939
Record Number:CaltechETD:etd-12282005-161537
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5159
Deposited By: Imported from ETD-db
Deposited On:29 Dec 2005
Last Modified:22 Feb 2023 21:57

Thesis Files

PDF (Fan_ht_1939.pdf) - Final Version
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