Publication

Fatigue tests on the detail of butt re-welded additional cover plates - Final report

Alain Nussbaumer
2016
Reports

Abstract

Définition du Mandat : Concevoir, réaliser et tester la résistance à la fatigue d’une réparation consistant à meuler les extrémités des semelles puis res-souder de nouvelles parties de semelles additionnelles. De cette manière, on recrée des semelles additionnelles continues, sans extrémités. Ce détail sera utilisé pour renforcer le pont existant sur Baarestrasse à Zug ainsi que pour définir une nouvelle caté-gorie de détail.

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Alain Nussbaumer
2016
Reports

Abstract

Official source

Related concepts (3)

Fatigue (material)

In materials science, fatigue is the initiation and propagation of cracks in a material due to cyclic loading. Once a fatigue crack has initiated, it grows a small amount with each loading cycle, typically producing striations on some parts of the fracture surface. The crack will continue to grow until it reaches a critical size, which occurs when the stress intensity factor of the crack exceeds the fracture toughness of the material, producing rapid propagation and typically complete fracture of the structure.

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.

Pressure vessel

A pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure. Construction methods and materials may be chosen to suit the pressure application, and will depend on the size of the vessel, the contents, working pressure, mass constraints, and the number of items required. Pressure vessels can be dangerous, and fatal accidents have occurred in the history of their development and operation.