000133326 001__ 133326
000133326 005__ 20190316234454.0
000133326 0247_ $$2doi$$a10.1002/mawe.200800356
000133326 022__ $$a0933-5137
000133326 02470 $$2ISI$$a000260774000032
000133326 037__ $$aARTICLE
000133326 245__ $$aSize effects in the fatigue behavior of welded tubular bridge joints
000133326 269__ $$a2008
000133326 260__ $$bWiley-Blackwell$$c2008
000133326 336__ $$aJournal Articles
000133326 520__ $$aTubular space trusses for bridge applications use thick-walled tubes. The reduction in fatigue resistance due to geometrical size effects is thus an important issue. In order to carry out a thorough study, both fatigue tests on large-scale specimens and advanced 3D crack propagation modelling were carried out at ICOM/EPFL. The study is limited to circular hollow sections (CHS) K-joints. An alternate current potential drop (ACPD) system is used to measure crack depth on nodes of the tested truss specimens. The results obtained from the tests are given in the paper in terms of S-N data, crack depth versus number of cycles and deduced crack propagation rates. The numerical model was developed using the dual boundary elements method (DBEM), software BEASYTM, and was validated with fatigue tests data. The stress intensity factors (SIF) along the doubly curved crack front at different crack depths were obtained.With this model, a parametric study investigates the influence of geometry, size and load case on fatigue life. The results of both proportional and non-proportional sizing effects on fatigue strength are presented. The paper shows that size effects (proportional and non-proportional) can be expressed as a function of the non-dimensional parameters and chord thickness. Keywords: Structural steel, fatigue, size effects, large-scale tests, boundary element method.
000133326 6531_ $$a607/ICOM
000133326 700__ $$0243059$$g113159$$aNussbaumer, Alain
000133326 700__ $$aCosta Borges, Luis$$g166103$$0243907
000133326 773__ $$j39$$tMaterialwissenschaft und Werkstofftechnik$$k10$$q740-748
000133326 8564_ $$zURL
000133326 8564_ $$uhttps://infoscience.epfl.ch/record/133326/files/Darmstadt08-AN-final-mac.ppt$$zn/a$$s9782784
000133326 8564_ $$uhttps://infoscience.epfl.ch/record/133326/files/Mat.-wiss.u.Werkstofftech_AN-LB.pdf$$zn/a$$s387868
000133326 8564_ $$uhttps://infoscience.epfl.ch/record/133326/files/Nuss-Borg-ref-fig-tables-vf2.doc$$zn/a$$s1844224
000133326 8564_ $$uhttps://infoscience.epfl.ch/record/133326/files/SoSDiD-08-Nussbaumer-Borges.doc$$zn/a$$s1917440
000133326 909C0 $$xU10233$$0252127$$pICOM
000133326 909CO $$qGLOBAL_SET$$particle$$ooai:infoscience.tind.io:133326
000133326 917Z8 $$x113159
000133326 937__ $$aICOM-ARTICLE-2009-008
000133326 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000133326 980__ $$aARTICLE