Ultimate strength and fracture behaviour of cracked welded square hollow section T-joints

Abstract

Background 1 1.2 Scope and Objectives 4 CHAPTER 2 LITERATURE REVIEW 8 2.1 Square and Rectangular Hollow Section Joints 8 2.2 General Design Philosophy of SHS and RHS Trusses 8 2.3 Failure Criteria of SHS and RHS Tubular Joints 9 2.4 Failure Modes of RHS Joints 9 2.5 Analytical Models to Predict Ultimate Strength of RHS Joints 2.5.1 Yield Line Model 2.5.2 Punching Shear Model 2.5.3 Effective Width Model 2.5.4 Chord Wall Bearing or Local Buckling 2.5.5 Shear Yield Model 2.6 Research on Strength of Cracked Tubular Joints 2.7 Fracture Mechanics Approach for Assessments of Welded Joints 2.7.

New weld toe magnification factors for semi‐elliptical cracks in plate‐to‐plate butt‐welded joints

“…In the present study, about 1400 cases of different geometries of butt welds are analysed. A new FE mesh generator is developed to create these models, which is based on some on‐going research works in Nanyang Technological University, Singapore . The new mesh generator can generate input files compatible with abaqus software .…”

“…A new FE mesh generator is developed to create these models, which is based on some on-going research works in Nanyang Technological University, Singapore. [15][16][17] The new mesh generator can generate input files compatible with ABAQUS software. 18 Then the stress intensity factors are extracted from the result files, which are used to calculate the M k values of butt welds.…”

Safety and risk assessment of damaged multi-planar square hollow section (SHS) TT-, YT- and KT-joints

“…Moreover, the previous approach (Yang, 2005) employed 5 different types of elements for finite element (FE) mesh modelling. Element shapes such as prism, tetrahedron and pyramid were used near the crack front with very sharp angles.…”

“…The welding is performed at the joints or "nodes". In a joint, the main member is labelled as the chord, while the other members which intersect with the chord, are called the braces (Yang, 2005). These nodal points represent the weakest region of the welded structure and therefore, research on the plastic collapse load (P c ) of these joints is essential (…”

“…Generally, three possible failure criteria can be observed. They are P c load, load at a certain deformation limit, and load at the observation of the first crack for uncracked joints or load at the beginning of crack propagation for cracked joints (Yang, 2005). The broadly acknowledged criterion of failure is the P c load.…”