Sociedad Española de Integridad Estructural
Grupo Español de Fractura

Sociedad Española de Integridad Estructural
Grupo Español de Fractura

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FEM ANALYSIS OF RIVETED CONNECTIONS AIMING FATIGUE AND FRACTURE ASSESSMENTS

A.M.P de Jesus  R. M. G. Pereira       

Anales de la Mecánica de la Fractura, nº 27 . 2010 . Pág. -
Ver (.pdf): 50

Resumen: Old riveted bridges are susceptible to exhibit significant fatigue damage levels, since they were originally designed without taking into account the fatigue phenomenon and they were subjected to increasing loading, along their long operational period. Due to economic reasons, the operational period of those structures has been further increased, requiring detailed residual fatigue life studies. The usual procedures for fatigue analysis of riveted connections are based on the S-N approach. The local approaches and Fracture Mechanics appear as alternatives to the S-N approach, to derive the fatigue strength for riveted joints, with higher flexibility than S-N approaches. These alternative approaches require detailed stress analysis. This paper proposes a methodology for detailed stress analysis of multi-riveted connections using the Finite Element Method. The proposed methodology is demonstrated for a stringer-to-cross-girder intersection, using the ANSYS® commercial code. This methodology consists on 3D finite element models using both solid and shell elements as well as contact elements. The proposed model is able to account the clamping stresses of rivets on stress distributions. Also, choosing several crack propagation scenarios, the stress intensity factors are evaluated using the crack closure technique.

LocalizaciónPorto

Departamento de Engenharias, Escola de Ciências e Tecnologia, Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados,
Unidade de Concepção e Validação Experimental, Instituto de Engenharia Mecânica – IDMEC, Pólo FEUP Rua Dr. Roberto Frias, 4200-465 Porto, Portugal





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