Case Studies on Finite Element Modeling of Welded Joints

Abstract

Joints made out of tubular steel members are often used in industrial constructions, like offshore, trusses or tree-shaped columns. The joint area is the weakest point in a truss structure. Beside the normal static behaviour many non-linearities due to the geometry or to the welding process have to take into account. Steel hollow sections are often used. Much research was made on welded nodes so far, but mostly it is valid for limited geometries or load cases. A review of the main aspects in designing welded nodes are given. The second part is about a study of two aspects. The first aim is to investigate the influence of the joint angle on the resistance of a T-joint made out of Circular-Hollow-Sections or Squared-Hollow-Sections under a tensional load. To archive the most realistic results, the second aspect, a numerical study on the finite element types and the element shape functions will be made.

Experimental Case Studies about Uniplanar SHS Joints with Full-Overlapped Top Connection

“…Moreover, these small differences in numerical and experimental results can be taken into account and used when a correlation factor is proposed for the analytical models. By comparing the results to models with intermediate steel plates [5][6][7][8], a higher resistance is achieved concerning the uniplanar full-overlapped joints with a direct pipe connection. The lines of application merge together in the center of the intermediate plate.…”

“…The joints fail before cracks appear. The implementation of the crack stress distribu- By comparing the results to models with intermediate steel plates [5][6][7][8], a higher resistance is achieved concerning the uniplanar full-overlapped joints with a direct pipe connection. The lines of application merge together in the center of the intermediate plate.…”

“…Heinemann et al studied the multiplanar [4] and uniplanar joints [5][6][7]. The joints studied so far mostly include intermediate plates [8], thus the analytical and numerical models are not comparable to the results of tests concerning the specimens made with a fulloverlapped welding joint.…”

Comprehensive design and analysis of a 300L steel fuel tank for heavy off-road vehicles: numerical and experimental insights

“…Hence, it is important to predict the strength of welded joints under static and dynamic loading conditions. Gheorghe Asachi (Heinemann et al, 2021) used the FEM method with different types of mesh elements to predict the stress concentration and deformation. The tetra linear elements were found to be more accurate as compared to tetra quadratic elements in predicting Von Mises stress data.…”