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Fatigue analysis of aluminum drill pipes

2005; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímer; Volume: 8; Issue: 4 Linguagem: Inglês

10.1590/s1516-14392005000400009

1980-5373

João Carlos Ribeiro Plácido, P. Miranda, Theodoro Antoun Netto, Ilson Pasqualino, Guilherme Farias Miscow, Bianca Pinheiro,

Metallurgy and Material Forming

An experimental program was performed to investigate the fundamental fatigue mechanisms of aluminum drill pipes. Initially, the fatigue properties were determined through small-scale tests performed in an optic-mechanical fatigue apparatus. Additionally, full-scale fatigue tests were carried out with three aluminum drill pipe specimens under combined loading of cyclic bending and constant axial tension. Finally, a finite element model was developed to simulate the stress field along the aluminum drill pipe during the fatigue tests and to estimate the stress concentration factors inside the tool joints. By this way, it was possible to estimate the stress values in regions not monitored during the fatigue tests.