Professional paper

https://doi.org/10.17559/TV-20141022092231

Influence of fatigue impact loading on radial carrier and rapping device fillet weld strength

Josip Sertić ; Mechanical Engineering Faculty in Slavonski Brod, Josip Juraj Strossmayer University of Osijek, Trg I. B. Mažuranić 2, HR-35000 Slavonski Brod, Republic of Croatia
Ivan Samardžić ; Mechanical Engineering Faculty in Slavonski Brod, Josip Juraj Strossmayer University of Osijek, Trg I. B. Mažuranić 2, HR-35000 Slavonski Brod, Republic of Croatia
Dražan Kozak orcid.org/0000-0001-5245-4686 ; Mechanical Engineering Faculty in Slavonski Brod, Josip Juraj Strossmayer University of Osijek, Trg I. B. Mažuranić 2, HR-35000 Slavonski Brod, Republic of Croatia
Damir Šimunić ; Đuro Đaković Termoenergetska postrojenja d.o.o., Member of OJSC Power Machines Russia, Mile Budaka 1, HR-35000 Slavonski Brod, Republic of Croatia
Ivan Gelo ; Mechanical Engineering Faculty in Slavonski Brod, Josip Juraj Strossmayer University of Osijek, Trg I. B. Mažuranić 2, HR-35000 Slavonski Brod, Republic of Croatia
Dino Bučević-Keran ; Đuro Đaković Specijalna vozila d.d., Mile Budaka 1, HR-35000 Slavonski Brod, Republic of Croatia

Abstract

The device used to shake off the ash of the steam boiler harp consists of a drive shaft which has radial carriers welded on. During the operation of the waste incinerator steam boiler in Riverside, a fracture of the radial carrier and drive shaft weld occurred. Such a welded T-joint is made as a double fillet weld. It is loaded with the impact loading which causes the fatigue of material because of its repetition. The analytical calculation, with which the load-bearing capacity of the welded joint is determined, is suggested in this paper. The suggested analytical calculation of the mean impact force is based on the law of momentum conservation during the collision of rapping device and elastically deformable heat exchanger harp. The mean impact force is applied for the weld strength calculation. The results showed that the use of double fillet weld loaded with the fatigue impact loading was a bad choice. The suggested analytical calculation model is applicable for the rapping device design.

Keywords

double fillet weld; fatigue; impact loading; rapping device; strength

Hrčak ID:

138119

URI

https://hrcak.srce.hr/138119

Publication date:

22.4.2015.

Article data in other languages: croatian

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