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A preliminary investigation of rivets and riveted joints in metal airplane construction

Citation

Magden, John L. (1934) A preliminary investigation of rivets and riveted joints in metal airplane construction. Master's thesis, California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-07172007-081411

Abstract

In order that the results of these tests might be of the most practical value, the test specimens were made at the Douglas Company with the same material and methods used in present metal construction. The material used was 24srt sheet with l7st rivets except in a few specimens that will be mentioned later.

The first two test series were designed to determine the optimum edge distance and pitch in terms of the rivet diameter for a single riveted lap joint.

The third test series was used to determine the ultimate bearing strength of 24srt sheet for various sheet thickness. Tests were made for both lap and butt joints. The lap joint was tested for the following type rivets.

1. Round head rivets. 2. Countersunk rivets. 3. 3's rivets with welded heads.

Tests were also made showing the variation of bearing strength of the sheet in a lap joint with the head of the rivet.

Test series No. 4 was devoted to the shear of rivets. An attempt was made to classify the following riveting methods by the shearing value of the driver rivet.

1. Hand Riveting. 2. Vibrators (Air Hammer). 3. Pneumatic Squeezers. 4. Spinners. 5. One shot Gun. 6. Automatic Riveter (Eccentric Press)

These tests were made using a lap joint and covered the range of rivets from 3/32" to 1/4" in diameter. Shearing tests were also made using countersunk rivets and 3s rivets with welded heads. Various diameter of 17st rivets were tested in double shear and a test was made showing the variation of shearing value versus sheet thickness for both single and double shear. Also the effect of friction upon the ultimate shearing value of rivets was determined.

Test series No. 5 was used to determine the shearing value of malleability of 17st rivets for various times of ageing.

Test series No. 6 gives the ultimate tensile strength of 24srt sheet for various thickness of sheet from .020 to .128".

Test series No. 7 ---- Because of some question as to the load taken by rivets when placed in line a series of specimens were made up with the number of rivets in a line varying from 1 to 12. The specimens were tested for ultimate load.

Item Type:Thesis (Master's thesis)
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Klein, Arthur Louis (advisor)
  • Sechler, Ernest Edwin (advisor)
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1934
Record Number:CaltechETD:etd-07172007-081411
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-07172007-081411
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2907
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:02 Aug 2007
Last Modified:26 Dec 2012 02:55

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