التفاصيل البيبلوغرافية
| العنوان: |
STRESS CONCENTRATION FACTORS AND FATIGUE FAILURE OF WELDED T-CONNECTIONS IN CIRCULAR HOLLOW SECTIONS UNDER IN-PLANE BENDING. |
| المؤلفون: |
MASHIRI, FIDELIS RUTENDO, ZHAO, XIAO-LING, GRUNDY, PAUL |
| المصدر: |
International Journal of Structural Stability & Dynamics; Sep2004, Vol. 4 Issue 3, p403-422, 20p |
| مصطلحات موضوعية: |
BENDING (Metalwork), BEHAVIOR, MEASUREMENT, STRESS concentration, TECHNICAL specifications, STEEL tubes |
| مستخلص: |
The fatigue behavior of welded thin-walled T-joints made up of both circular hollow section (CHS) braces and chords, subjected to cyclic in-plane bending, is described in this paper. CHS chords and braces are of thicknesses less than 4 mm. Current fatigue design guidelines show that the design of welded tubular nodal joints is restricted to thicknesses greater than or equal to 4 mm. The increased availability and use of thin-walled (t<4 mm) tubes of high-strength steels in recent years, in structures subjected to cyclic loading, means that it is important to study the fatigue behavior of welded thin-walled tubular nodal joints. In this paper, welded thin-walled CHS-CHS T-joints subjected to constant-stress-amplitude cyclic in-plane bending range are studied. The stress concentration factors (SCFs) determined experimentally at the brace and chord crown positions are shown to be about 30% and 40% respectively of the SCFs determined using parametric equations in existing fatigue design guidelines. The fatigue tests showed that in welded thin-walled CHS-CHS T-joints, a through-thickness crack occurs when the surface crack length along the weld toes in the chord has grown to a length equal to about 40% of the circumference of the brace member. An end of test failure criterion was proposed as an alternative to the through-thickness failure criterion, in obtaining data that is suitable for determining fatigue design S-N curves. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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