Study on the Ultimate Failure Strength of Marine FRP Stiffened Plates
Date Issued
2006
Date
2006
Author(s)
Lin, Chin-Cheng
DOI
zh-TW
Abstract
Since FRP(Fiber Reinforced Plastic) has the advantages of high specific strength, it can reduce the weight of the ship when applying to the ship structure. However, the structures constructed by FRP have the problem of relatively low modulus of materials, this leads to the large deflection of FRP laminates. Therefore, we need to stiffen unsupported plates by appropriate mechanism. The most prevalent longitudinal adopted by craft structures is the top-hat stiffeners. On other side, the craft will be exposed above the water and lead to heavy slamming force while sailing in high speed in the sea. Therefore, we should examine the effects and ultimate load of stiffened plate.
In actual experiment,an experimental apparatus for the purpose of creating failure on the test pieces under hydrostatic pressure and hydrodynamic pressure identical to the exerting pattern of slamming loads is used. Then we can verify the results of numerical method from experiment.
In the numerical analysis, based on the failure analysis of the GFRP laminates, the model that the sections are separated into fiber layers and matrix layers are considered in simulating the stiffened plates. We also established the suitable failure criterion and stiffness modification factor curve in stiffened plates. The finite element analysis is performed by software ABAQUS in cooperated with user subroutine USDFLD to proceed the numerical failure analysis of the stiffened plates. By this we can identify the failure location and mode of the structure as well as the effects of stiffening. Because the failure progress of stiffened plates is unable to understand, we only can observe by numerical analysis. Through the numerical methods and experiment of this research, we can know well the property of stiffened plates. It is positive for relevant design at a later date.
Subjects
FRP
補強板
破壞分析
stiffened plates
failure analysis
SDGs
Type
thesis
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