"In this investigation an attempt has been made to determine simple formulae leading to a better, more useful and much safer design of flange coupling bolts. The bolts were tested under tensile loading and bending and hence the results obtained apply for bolts under these modes of loading only.
The behavior of flange bolts under different initial tightening torques was studied by measuring strains in a bolt on which strain gages had been attached* . From this, the load producing separation of flanges, under different tightening torques, was determined and used in deriving formulae for prediction of the load for the separation of flanges, under different tightening torques, and the final stresses in the bolts.
The constants in the formulae vary with the following factors:
(i) Initial tightening torques on the bolts
(ii) Thickness of flange
(iii) Number of bolts
(iv) Diameter of flange
(v) Diameter of bolts
(vi) Types of washers
(vii) Material of gasket
(viii) Thickness of the gasket
A complete investigation of the problem of a flange coupling using bolts would be, therefore, extremely lengthy. The author has investigated the problem with respect to the first two factors and it is his hope that on the basis of this thesis, attempts will be made in the future to investigate the other factors involved.
*Hereafter this bolt will be referred to as the 'instrumented bolt'"--Abstract, pages 2-3.
Faucett, T. R.
Miles, Aaron J.
Schaefer, Rodney A., 1926-2002
Jones, James A.
Mechanical and Aerospace Engineering
M.S. in Mechanical Engineering
Missouri School of Mines and Metallurgy
© 1962 Vijay Rastogi, All rights reserved.
Thesis - Open Access
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Rastogi, Vijay, "Experimental stress analysis of bolts in a flange coupling" (1962). Masters Theses. 2907.