Fatigue behaviors of square-to-square hollow section T-joint with corner crack. I: Experimental studies

Behaviour of bird-beak square hollow section X-joints under out-of-plane bending

“…Chord width to wall thickness ratio (b 0 /t 0 ) δ Local deformation of the chord δ concave Local deformation of the chord in compressive area δ convex Local deformation of the chord in tensile area δ vertical Vertical deformation of the chord ε f Elongation after fracture ε i Strain ε 1 First principal strain ε 2 Second principal strain ε 3 Third principal strain θ…”

“…It was shown that the local buckling and material yielding usually occurred at the brace and chord intersection region, which eventually affected the overall performance of truss structures. Experimental and numerical investigations were conducted by Chiew et al [1,2] on the fatigue behaviour of SHS T-joints with corner crack under out-of-plane bending. The conservative predictions were obtained for the stress intensity factors (SIFs) and the residual life.…”

Structural Analysis of an Articulated Urban Bus Chassis via FEM: a Methodology Applied to a Case Study

“…6. An attentive examination of the results shows that at a distance almost equal to the cross section dimensions (dashed lines) the stresses evaluated both via 3D mesh and via 2D mesh (without modeling the weld) converged to the reference one [14] and [15].…”

“…Both solid (3D) mesh and shell (2D) mesh have been compared to the results obtained in the reference geometry reported in Fig. 5 [14] and [15].…”

“…No welds are, accordingly, modelled in the chassis geometry; the connection between beam and column is managed by the contact stiffness parameters, as shown in [8]. In order to check the numerical structural stress state of the beam and column (far from the weld toe), a comparison with the data evaluated via strain gages in a square-tosquare hollow section T-joint [14] and [15], has been performed. Both solid (3D) mesh and shell (2D) mesh have been compared to the results obtained in the reference geometry reported in Fig.…”