Tearing and Folding Failure Analysis of Plate Under Ship Collisions
Date Issued
2004
Date
2004
Author(s)
WEE, ENG BAN
DOI
zh-TW
Abstract
Nowadays, more than 80 % of international cargo still depends on ship transportation. Due to the economic growth, the number of ships is increasing rapidly, at the same time, the ship collision and grounding issues become more and more important. The mechanics of ship collision and grounding are very complex topics and different damage modes may occur simultaneously for a structure. In past decades, the damage modes have been categorized into different simple modes, and the approximated methods have also developed for the simplified modes, e.g. beam and plate. Based on plastic damage mode, the simplified analytical formula for fundamental mechanics of plastic hinge line of the beam and plate simplified analytical formula can be derived for practical use. This thesis focus on the damage status of plate subjected to impact, especially the tearing mode and folding mode. We review some developed formulas and introduced the derivation of simplified analytical formula.
Finite Element Method has been widely used in ship collision and grounding issues. In this paper the LS-DYNA was used to verify the damage model. The calculated results are compared with simplified analytical formula.
Subjects
褶皺破壞
塑性吸能
半解析估算式
切割破壞
FEM
擱淺
碰撞
plastic energy
tearing
folding
grounding
collision
half analytic approximation
SDGs
Type
thesis
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