Publication

Evaluation of residual welding stresses and fatigue crack behavior in tubular K-joints in compression

Alain Nussbaumer, Jean-Marie Drezet, Claire Acevedo
2011
Journal Articles

Abstract

Tubular bridge design has to deal with fatigue issues. The fatigue susceptibility of these bridges, composed of circular hollow section profiles welded together in K-joints, is mainly due to stress concentrations, to welding imperfections and to tensile residual stresses induced by the welding process.

Official source

https://infoscience.epfl.ch/entities/publication/8d48a8d5-08b6-49b2-9730-a7351e8bd61e

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Alain Nussbaumer, Jean-Marie Drezet, Claire Acevedo
2011
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/8d48a8d5-08b6-49b2-9730-a7351e8bd61e

About this result

Related concepts (17)

Residual stress

In materials science and solid mechanics, residual stresses are stresses that remain in a solid material after the original cause of the stresses has been removed. Residual stress may be desirable or undesirable. For example, laser peening imparts deep beneficial compressive residual stresses into metal components such as turbine engine fan blades, and it is used in toughened glass to allow for large, thin, crack- and scratch-resistant glass displays on smartphones.

Welding

Welding is a fabrication process that joins materials, usually metals or thermoplastics, by using high heat to melt the parts together and allowing them to cool, causing fusion. Welding is distinct from lower temperature techniques such as brazing and soldering, which do not melt the base metal (parent metal). In addition to melting the base metal, a filler material is typically added to the joint to form a pool of molten material (the weld pool) that cools to form a joint that, based on weld configuration (butt, full penetration, fillet, etc.

Shielded metal arc welding

Shielded metal arc welding (SMAW), also known as manual metal arc welding (MMA or MMAW), flux shielded arc welding or informally as stick welding, is a manual arc welding process that uses a consumable electrode covered with a flux to lay the weld. An electric current, in the form of either alternating current or direct current from a welding power supply, is used to form an electric arc between the electrode and the metals to be joined. The workpiece and the electrode melts forming a pool of molten metal (weld pool) that cools to form a joint.

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