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<title>UTas ePrints - Stress concentration factors and fatigue behaviour of welded thin-walled CHS-SHS T-Joints under in-plane bending</title>
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<meta content="Mashiri, F.R." name="eprints.creators_name" />
<meta content="Zhao, X.L." name="eprints.creators_name" />
<meta content="Grundy, P." name="eprints.creators_name" />
<meta content="Fidelis.Mashiri@utas.edu.au" name="eprints.creators_id" />
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<meta content="2007-12-10 02:53:48" name="eprints.datestamp" />
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<meta content="Stress concentration factors and fatigue behaviour of welded
thin-walled CHS-SHS T-Joints under in-plane bending" name="eprints.title" />
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<meta content="Fatigue; Hollow section joint; Stress concentration; Hot spot stress; Surface crack; Through thickness crack " name="eprints.keywords" />
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<meta content="Fatigue tests were carried out on welded thin-walled (t<4mm) T-joints made of circular hollow section (CHS) braces welded onto square hollow section (SHS) chords, under the loading conditions of “in-plane bending in the brace”. Stress distributions were measured at different hot spot locations around the chord-brace junction, where cracks were observed to initiate and grow causing fatigue failure. The degree of
non-linearity from the measured stress distributions around the weld toes of the brace-chord junction showed that stress distribution is significantly non-linear, along specified locations for brace diameter to chord width ratios greater than 0.5. The quadratic method of extrapolation of local strains/stresses to determine hot spot stresses is recommended. Using the measured stress distributions from this investigation and results from previous research, hot spot location lines that produce the highest hot spot
stresses are recommended. The stress concentration factors for the welded thin-walled CHS-SHS T-joints lie in between the predicted values of SCFs for CHS-CHS and SHS-SHS T-joints for given non-dimensional parameters. A method is suggested for estimating SCFs for welded thin-walled CHS-SHS Tjoints using existing parametric equations for SHS-SHS T-joints. An end of test failure criterion is chosen
and shown to be a reliable method for obtaining fatigue data that can be used for producing design S-N curves. A through-thickness crack is shown to occur when a surface crack had grown to a length equal to about 40% of the circumference of the weld toe in the chord." name="eprints.abstract" />
<meta content="2004" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Engineering Structures" name="eprints.publication" />
<meta content="26" name="eprints.volume" />
<meta content="13" name="eprints.number" />
<meta content="1861-1875" name="eprints.pagerange" />
<meta content="10.1016/j.engstruct.2004.06.010" name="eprints.id_number" />
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<meta content="1] Gandhi P. and Berge S. 1998, “Fatigue Behaviour of T-joints: Square Chords and Circular Braces”,
Journal of Structural Engineering, ASCE, Vol. 124, No. 4, April 1998, pp. 399-404
[2] IIW 2000: Fatigue Design Procedures for Welded Hollow Section Joints, IIW Doc. XIII-1804-99, IIW
Doc. XV-1035-99, Recommendations for IIW Subcommission XV-E, Edited by X.L. Zhao and J.A.
Packer, Abington Publishing, Cambridge, UK.
[3] Zhao X.L., Herion S., Packer J.A., Puthli R., Sedlacek G., Wardenier J., Weynand K., van Wingerde
A., and Yeomans N. 2000, “Design Guide for Circular and Rectangular Hollow Section Joints under
Fatigue Loading”, Verlag TÜV Rheinland, Köln, Germany.
[4] Berge S., Gandhi P. and Lereim J. 1995, “Fatigue of hollow section T-joints of Circular Braces and
Square Chords”, Proceedings of the 14th International Conference on Offshore Mechanics and Arctic
Engineering, OMAE 1995, Vol.III, Editors: Subarak K. Chakrabati et al., Copenhagen, Denmark, June
18-22, 1995, pp. 203-208
[5] Bian L.C and Lim J.K. 2003, “Fatigue Strength and Stress Concentration Factors of CHS-to-RHS T18/
32
Joints”, Journal of Constructional Steel Research, Vol. 59, Issue 5, pp. 561-663, May 2003.
[6] Mashiri F.R., Zhao X.L. and Grundy P. 2000, “Crack Propagation Analysis of Welded Thin-Walled
Joints using Boundary Element Method”, Computational Mechanics, Vol. 26, No. 2, Springer-Verlag
2000, pp. 157-165
[7] Mashiri F.R., Zhao X.L. and Grundy P. 2001, “Effect of weld profile and undercut on fatigue crack
propagation life of thin-walled cruciform joint” Thin-Walled Structures, Vol. 39, Issue 3, Elsevier
Science Ltd, March 2001, pp. 261-285
[8] Mashiri F.R., Zhao X.L. and Grundy P. 2002a, “Fatigue Tests and Design of Thin Cold-Formed
Square Hollow Section-to-Plate T-Connections under In-Plane Bending” Journal of Structural
Engineering, ASCE, Vol. 128, No. 1, January 2002, pp. 22-31
[9] Mashiri F.R., Zhao X.L., Grundy P. and Tong L. 2002b, “Fatigue Design of Very Thin-Walled SHSto-
plate Joints under In-Plane Bending”, Thin-Walled Structures, Vol. 40, Issue. 2, Elsevier Science
Ltd, February 2002, pp. 125-151
[10] Mashiri F.R., Zhao X.L. and Grundy P. 2002c, “Fatigue Tests and Design of Welded T-Connections
in Thin Cold-Formed Square Hollow Sections under In-Plane Bending” Journal of Structural
Engineering, ASCE, Vol. 128, No. 11, November 2002, pp. 1413-1422
[11] SAA 1991: Structural Steel Hollow Sections, Australian Standard AS1163-1991, Standards
Association of Australia, Sydney, Australia
[12] SAA 2000, Structural Steel Welding, Part 1: Welding of Steel Structures, Australian Standard
AS/NZS 1554.1-2000, Standards Association of Australia, Sydney, Australia.
[13] SAA 1995, Structural Steel Welding, Part 5: Welding of Steel Structures subject to High Levels of
Fatigue Loading, Australian Standard AS/NZS 1554.5-1995, Standards Association of Australia,
19/32
Sydney, Australia
[14] Mashiri F.R., Zhao X.L. and Grundy P. 2004, “Stress Concentration Factors and Fatigue Failure of
Welded T-Connections in Thin Cold-Formed Circular Hollow Sections under In-Plane Bending”,
International Journal of Structural Stability and Dynamics, World Scientific (Under Review)
[15] Tong L., Zhao X.L., Mashiri F.R., Grundy P. and Zheng H.Z. 2003, “Fatigue Crack Initiation and
Propagation in Thin Walled CHS-to-SHS T-Joints”, Advances in Structures, Vol. 1, Proceedings of
the International Conference on Advances in Structures: Steel, Concrete, Composite and Aluminium,
ASSCCA’03, Editors: Hancock G.J., Bradford M.A., Wilkinson T.J. Uy. B and Rasmussen K.J.R.,
23-25 June 2003, Sydney, Australia, pp. 137-142
[16] van Wingerde A.M. 1992: The fatigue behaviour of T- and X-joints made of SHS, Heron, Vol. 37,
No. 2, pp. 1-180
[17] Mashiri F.R. 2001, “Thin-Walled Tubular Connections under Fatigue Loading”, PhD Thesis,
Department of Civil Engineering, Monash University, Wellington Rd, Clayton, VIC. 3800, Australia.
[18] Zhao X.L and Hancock G.J. 1995: Butt Welds and Transverse Fillet Welds in Thin Cold-Formed
RHS Members, Journal of Structural Engineering, ASCE, 121 (11), pp. 1674-1682
[19] van Wingerde A.M., van Delft D.R.V., Wardenier J. & Packer J.A., 1997: Scale Effects on the
Fatigue Behaviour of Tubular Structures. IIW International Conference on Performance of
Dynamically Loaded Welded Structures, July 14-15, San Francisco, U.S.A, pp. 123-135
[20] EC3 1992, Eurocode 3: Design of Steel Structures-Part 1.1: General Rules and Rules for Buildings,
ENV 1993-1-1, European Committee for Standardization, Brussels, Belgium.
[21] SAA 1998: Steel Structures, Australian Standard AS 4100-1998, Standards Association of Australia,
Sydney, Australia." name="eprints.referencetext" />
<meta content="Mashiri, F.R. and Zhao, X.L. and Grundy, P. (2004) Stress concentration factors and fatigue behaviour of welded thin-walled CHS-SHS T-Joints under in-plane bending. Engineering Structures, 26 (13). pp. 1861-1875. ISSN 0141-0296" name="eprints.citation" />
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<meta content="Fatigue tests were carried out on welded thin-walled (t<4mm) T-joints made of circular hollow section (CHS) braces welded onto square hollow section (SHS) chords, under the loading conditions of “in-plane bending in the brace”. Stress distributions were measured at different hot spot locations around the chord-brace junction, where cracks were observed to initiate and grow causing fatigue failure. The degree of
non-linearity from the measured stress distributions around the weld toes of the brace-chord junction showed that stress distribution is significantly non-linear, along specified locations for brace diameter to chord width ratios greater than 0.5. The quadratic method of extrapolation of local strains/stresses to determine hot spot stresses is recommended. Using the measured stress distributions from this investigation and results from previous research, hot spot location lines that produce the highest hot spot
stresses are recommended. The stress concentration factors for the welded thin-walled CHS-SHS T-joints lie in between the predicted values of SCFs for CHS-CHS and SHS-SHS T-joints for given non-dimensional parameters. A method is suggested for estimating SCFs for welded thin-walled CHS-SHS Tjoints using existing parametric equations for SHS-SHS T-joints. An end of test failure criterion is chosen
and shown to be a reliable method for obtaining fatigue data that can be used for producing design S-N curves. A through-thickness crack is shown to occur when a surface crack had grown to a length equal to about 40% of the circumference of the weld toe in the chord." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Stress concentration factors and fatigue behaviour of welded thin-walled CHS-SHS T-Joints under in-plane bending</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Mashiri, F.R.</span> and <span class="person_name">Zhao, X.L.</span> and <span class="person_name">Grundy, P.</span> (2004) <xhtml:em>Stress concentration factors and fatigue behaviour of welded thin-walled CHS-SHS T-Joints under in-plane bending.</xhtml:em> Engineering Structures, 26 (13). pp. 1861-1875. ISSN 0141-0296</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/2603/1/MashiriZhaoGrundy_CHS-SHS_SCFs_EngStruct_26-13_2004.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/2603/1/MashiriZhaoGrundy_CHS-SHS_SCFs_EngStruct_26-13_2004.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />347Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="3411" name="docid" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1016/j.engstruct.2004.06.010">http://dx.doi.org/10.1016/j.engstruct.2004.06.010</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Fatigue tests were carried out on welded thin-walled (t<4mm) T-joints made of circular hollow section (CHS) braces welded onto square hollow section (SHS) chords, under the loading conditions of “in-plane bending in the brace”. Stress distributions were measured at different hot spot locations around the chord-brace junction, where cracks were observed to initiate and grow causing fatigue failure. The degree of
non-linearity from the measured stress distributions around the weld toes of the brace-chord junction showed that stress distribution is significantly non-linear, along specified locations for brace diameter to chord width ratios greater than 0.5. The quadratic method of extrapolation of local strains/stresses to determine hot spot stresses is recommended. Using the measured stress distributions from this investigation and results from previous research, hot spot location lines that produce the highest hot spot
stresses are recommended. The stress concentration factors for the welded thin-walled CHS-SHS T-joints lie in between the predicted values of SCFs for CHS-CHS and SHS-SHS T-joints for given non-dimensional parameters. A method is suggested for estimating SCFs for welded thin-walled CHS-SHS Tjoints using existing parametric equations for SHS-SHS T-joints. An end of test failure criterion is chosen
and shown to be a reliable method for obtaining fatigue data that can be used for producing design S-N curves. A through-thickness crack is shown to occur when a surface crack had grown to a length equal to about 40% of the circumference of the weld toe in the chord.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Additional Information:</th><td valign="top" class="ep_row">The definitive version is available at http://www.sciencedirect.com
</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">Fatigue; Hollow section joint; Stress concentration; Hot spot stress; Surface crack; Through thickness crack </td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/290801.html">290000 Engineering and Technology > 290800 Civil Engineering > 290801 Structural Engineering</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">2603</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Dr Fidelis R. Mashiri</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">10 Dec 2007 13:53</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=2603;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=2603">item control page</a></p>
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