Some mathematical considerations relating to the sagging of bars of uniform circular cross section

In order to estimate creep parameters from sagging bar tests, a creep modulus F has been defined, by analogy to elastic moduli, such that F = σ n /(d ϵ/d t) where σ is the stress, ϵ is the strain, t is the time and n is a constant. A mathematical analysis has been made of this relation leading to a...

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Bibliographic Details
Published in:Nuclear engineering and design 1967-01, Vol.6 (4), p.342-344
Main Authors: Slattery, G.F., Miller, W.N.
Format: Article
Language:English
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Summary:In order to estimate creep parameters from sagging bar tests, a creep modulus F has been defined, by analogy to elastic moduli, such that F = σ n /(d ϵ/d t) where σ is the stress, ϵ is the strain, t is the time and n is a constant. A mathematical analysis has been made of this relation leading to a general form of bending moment equation. Expressions are derived for particular values of n which relate the sagging rates of the mid-points of end supported uranium bars to the creep modulus F. The expressions are used in experimental determinations of the parameter n from sagging bar tests carried out on uranium.
ISSN:0029-5493
1872-759X
DOI:10.1016/0029-5493(67)90113-6