2012 Fiscal Year Final Research Report

Study on Evaluation of Compressive Strength of GFRP Stiffened Panel with Top-Hat Stiffener

Research Project

Project/Area Number	22560793
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Naval and maritime engineering
Research Institution	Ehime University
Principal Investigator	YANAGIHARA Daisuke 愛媛大学, 大学院・理工学研究科, 寄附講座准教授 (10294539)
Project Period (FY)	2010 – 2012
Keywords	複合材料 / FRP / 座屈 / 層間はく離 / ハット型スチフナ / 防撓パネル
Research Abstract	Based on the results obtained by buckling tests for a GFRP unstiffened panel and stiffened panels with a top-hat stiffener, the fundamental buckling/fracture behavior including initiation of delamination is identified. Compressive stress in BWR layers is considered as one of the causes of the delamination, and the critical stress is derived by compressive material tests. To obtain a criterion for delamination produced in the curved part of the top-hat stiffener, four-pointed bending tests for curved band plates are carried out. Based on the through-thickness stress produced in the curved plate, the critical bending moment is derived. Through the validation of the critical values, the possibility to predict the initiation of the delamination is indicated.

(2 results)