Raising the fatigue durability curves in case of the rehabilitation welding techniques

Babiş, Claudiu; Dimitrescu, Andrei; Chivu, Oana Roxana; Semenescu, Augustin; Petrescu, Valentin

doi:10.1088/1757-899x/400/2/022007

Cited by 1 publication

(2 citation statements)

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“…It is known that in the case of fillet welded joints loaded with variable loads, sometimes a great effort is made to reduce the stress concentrators. In this sense, several reconditioning technologies are known, such as the "Grinding weld toe" and the "WIG remelting weld toe" technology [1], [2], [3],[4], [5]. In both cases, the aim is to reduce the stress concentrators by increasing the radius between the weld and the base plate, in the first case by milling the intersection between the base material and the seam and in the second case by melting its WIG.…”

Section: Introductionmentioning

confidence: 99%

“…Our own research has shown that for thicknesses over 8 mm of the weld seams, the application of these techniques to reduce the stress concentrators is justified for fillet welded joints loaded for fatigue, obtaining an important increase in fatigue life [6], [7], [8]. Instead, the application of these techniques has no influence on the failures of the statically loaded fillet welded joints.…”

Section: Introductionmentioning

confidence: 99%

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FEM Analysis of the Welding Seams Geometry in Case of Fillet Welds

Babiş

Dimitrescu

Alecusan³

et al. 2021

MATEC Web Conf.

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The role of the welding seam is to achieve the non-removable joint between two or more parts. In principle, three geometric profiles of the welding seams can be obtained: straight profile; concave profile and convex profile. In practice, this geometric shape of the weld seam profile is very important, both in terms of the resistance of the joint to static stresses and in terms of its fatigue life. There are many factors that can influence the geometric shape of the weld seam: the welding process; welding regime; the nature of the filler materials used, the rehabilitation techniques applied and others. Often, this geometric shape of the weld bead is neglected, which is particularly dangerous due to the fact that an improper geometric shape can generate low mechanical strength in static loads or poor fatigue strength in variable loads. An optimum of the geometric configuration of the welding must be found, which reconciles both situations: the mechanical resistance in case of static stresses and also the fatigue resistance in case of variable loads. In this paper, an analysis will be made with finite elements for the straight and convex profile of the welding seams in the case of fillet welds subjected to fatigue. Several elements will be considered such as: damage; total deformation; fatigue sensitivity versus loading history; equivalent von Misses stress; safety factor.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%