Finite element cold bending residual stress evaluation on submarine pressure hull instability assessment
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Journal of Offshore Mechanics and Arctic Engineering
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Resumo
During the pressure hull manufacturing, processes like cold bending and welding are
often applied. These processes lead to permanent plastic deformations which are associated
with residual stresses. The presence of residual stresses is equivalent to the introduction
of an initial preload in the structure, which accelerates the plastification process,
decreasing pressure hull resistance. To quantify this reduction, a case study that considers
residual stresses due to cold bending on hull plates and frame flanges had been performed
using finite element models. The study encompasses hull diameters of 6, 8, and
10m with hull plates and frame flange thickness from 20 to 30 mm, with HY100 steel.
Finite element numerical analyses were done considering material and geometric nonlinearities.
First, the cold bending residual stresses were determined using finite element
models. Then, these cold bending residual stresses were introduced as initial stresses in
the submarine pressure hulls’ finite element models. In the end, it was possible to verify
that the presence of cold bending residual stress reduces the submarine hull collapse
pressure up to 4.3%.
Como referenciar
FRANQUETTO, PAULO R.; MATTAR NETO, MIGUEL. Finite element cold bending residual stress evaluation on submarine pressure hull instability assessment. Journal of Offshore Mechanics and Arctic Engineering, v. 138, p. 061101-1 - 061101-12, 2016. DOI: 10.1115/1.4034076. Disponível em: http://repositorio.ipen.br/handle/123456789/27121. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.