A stress magnification factor for plates with welding-induced curvatures

Federica Mancini*, Heikki Remes, Jani Romanoff

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference contributionScientificvertaisarvioitu

7 Lataukset (Pure)

Abstrakti

The fatigue strength of thin-walled structures can be reduced significantly by non-linear secondary bending effects resulting from geometrical imperfections such as axial and angular misalignments. The welding-induced distortions can cause a critical increase of the structural hot-spot stress in the vicinity of the weld. Traditionally, the classification society rules for the fatigue strength assessment of welded ship structures suggest an analytical formula for a stress magnification factor km for axial and angular misalignment under axial loading condition. Recently, the well-known analytical solution for the angular misalignment has been extended to account for the curvature effect. The present paper analyses the effect of non-ideal, intermediate boundary conditions between fixed and pinned ends. In this regard, the fixity factors ρ (with 0 ≤ p ≤ 1 from ideally pinned to clamped conditions) are introduced in order to model the actual constraint on the rotation close to the ends. Under tension, a non-negligible decrease of the km factor is observed in relation to the reduction of the fixity factor at the welded end, while the fixity factor related to the loaded end has a minor effect on the km factor. Under compression, the reduction of the beam end fixity factors results into lower buckling resistance.

AlkuperäiskieliEnglanti
OtsikkoStructures, Safety, and Reliability
KustantajaThe American Society of Mechanical Engineers (ASME)
ISBN (elektroninen)9780791884324
TilaSähköinen julkaisu (e-pub) ennen painettua julkistusta - 18 joulukuuta 2020
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaInternational Conference on Ocean, Offshore and Arctic Engineering - Virtual Conference - Online, Fort Lauderdale, Yhdysvallat
Kesto: 3 elokuuta 20207 elokuuta 2020
Konferenssinumero: 39
https://event.asme.org/OMAE

Julkaisusarja

NimiProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Vuosikerta2A-2020

Conference

ConferenceInternational Conference on Ocean, Offshore and Arctic Engineering
LyhennettäOMAE
MaaYhdysvallat
KaupunkiFort Lauderdale
Ajanjakso03/08/202007/08/2020
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