Finding realistic thermal stress

Though thermal stresses on threaded joints subject to cryogenic or extremely high temperatures is commonly evaluated by engineers, they often consider only the elasticity of the screws. If designers consider the elasticity of the joint material and radial contration of the screws, thermal stresses c...

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Bibliographic Details
Published inMachine design Vol. 65; no. 8; p. 76
Main Author Rash, Larry C
Format Magazine Article
LanguageEnglish
Published Nashville Endeavor Business Media 23.04.1993
Subjects
Analysis
Design engineering
Manufacturing
Reduction
Stress
Temperature
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ISSN0024-9114
1944-9577

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Summary:Though thermal stresses on threaded joints subject to cryogenic or extremely high temperatures is commonly evaluated by engineers, they often consider only the elasticity of the screws. If designers consider the elasticity of the joint material and radial contration of the screws, thermal stresses can be reduced. The evaluation begins by assuming that thermal loads in the joint are due to differential thermal contraction, and that these loads interact with assembly preloads to relax conventionally determined thermal stresses. Starting with a conventional analysis of axial strain, the effects of joint-material elasticity and radial contraction are added. Methodology is presented.
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ISSN:0024-9114
1944-9577