Abstract:
The finite element simulation results of the monobull amidships
subjected to vertical bending moment are presented. The simulated
structures are made of aluminum alloy 5083 Hl 16, 6061 T6, 6082 T5,
mild steel S235, high tensile steel S355 of nominal ultimate stress
reinforced with extruded part of the same material. Besides that, two cases
with hull using aluminum alloy 5083 H 116 combine with extruded part
using aluminum alloy 6061 T6 and 6082 T5 respectively were also
generated. The bending moment curvature curves are presented covering
the ultimate bending moment of sagging and hogging analysis of each
case with the deflection of each model at the ultimate bending moment has
been predicted. The study was also including the comparisons of all cases
regarding to the ultimate bending moment, maximum stress distribution at
the model local penal and the model global ultimate strength. In the final
part of the study, the modes of collapse for each model's keels and center
girder are discussed. The concept is very useful to identify the governing
parameters affecting the ultimate strength of 30 structures under
predominant bending moment.