Combined strain rate, mesh size and calibration test influence on structural failure: Miniature ship grounding test
作者： Miguel A.G. Calle , Roberto E. Oshiro , Mihkel Kõrgesaar , Marcilio Alves , Pentti Kujala
DOI: 10.1016/J.OCEANENG.2019.01.002
关键词: Tearing 、 Material failure theory 、 Stress (mechanics) 、 Plasticity 、 Fracture (geology) 、 Perforation (oil well) 、 Strain rate 、 Finite element method 、 Materials science 、 Structural engineering
摘要: Abstract This paper investigates the influence of strain rate and element size on fracture steel plates presented in marine structures undergoing grounding when modeled by finite method. Three different experimental tests (tensile, tearing perforation tests), performed at velocities, are used study. These conceived to cover diverse rupture modes related mainly crack initiation propagation. Plastic strain- stress state-based failure criteria were calibrated from these experiments. Sensitivity mesh also evaluated. A ship event was reproduced experimentally 1:100 reduced scale. experiment FE evaluate performance aforementioned criteria. The results verified significant state strain. In addition, it is shown that sole use tensile not enough properly characterize material observed structural collapse mode miniature bottom structure. be a combination stretching members.
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