INFLUENCE OF SURFACE ROUGHNESS AND CURVATURE RADIUS ON FATIGUE STRENGTH OF OUT-OF-PLANE GUSSET WELDED JOINTS WITH FINISHED WELD TOES

As a method of finishing weld toes for improving the fatigue strength, a bar grinder is usually employed. It is known that fatigue strength of steel members depends on stress concentration and surface roughness at the fatigue crack originating point. One of controlling factors on the stress concentr...

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Published inKou kouzou rombunshuu Vol. 20; no. 78; pp. 78_33 - 78_41
Main Authors MORI, Takeshi, MURAKAMI, Takanori, YAMADA, Kouji, IKOSHI, Junichi
Format Journal Article
LanguageJapanese
Published Japanese Society of Steel Construction 26.06.2013
Subjects
fatigue strength
grinding
Out-of-plane gusset joint
radius of curvature
surface roughness
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Summary:As a method of finishing weld toes for improving the fatigue strength, a bar grinder is usually employed. It is known that fatigue strength of steel members depends on stress concentration and surface roughness at the fatigue crack originating point. One of controlling factors on the stress concentration at the finished weld toes is a radius of curvature. In this study, for the purpose of investigating the effects of the curvature radius and surface roughness on the fatigue strength of out-of plane gusset welded joints with finished weld toes, fatigue tests have been performed on model specimens.
ISSN:1880-9928
1884-0329
DOI:10.11273/jssc.20.78_33