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成果報告書詳細
管理番号20170000000180
タイトル*平成28年度中間年報 水素利用技術研究開発事業 燃料電池自動車及び水素供給インフラの国内規制適正化、国際基準調和・国際標準化に関する研究開発 複合圧力容器蓄圧器の基準整備等に関する研究開発
公開日2017/6/7
報告書年度2016 - 2016
委託先名一般財団法人石油エネルギー技術センター 高圧ガス保安協会 国立大学法人東京大学
プロジェクト番号P13002
部署名新エネルギー部
和文要約
英文要約Title: Hydrogen Utilization Technology Development/Development for Adequate Domestic Regulation, International Harmonization in Regulation and International Standard for Fuel Cell Vehicle and Hydrogen Infrastructure/Development for Design Standard of Composite Accumulator for Hydrogen Refueling Station (FY2013-FY2017) FY2016 Annual Report

Responsibility:The University of Tokyo,The High Pressure Gas Safety Institute of Japan (KHK),Japan Petroleum Energy Center
Objective:This project is organized for investigation of optimum fatigue strength design three of Type3, 4 and 2 Carbon Fiber Reinforced Plastics (CFRP) accumulators for hydrogen refueling station. Results of the project will be utilized for adequate domestic regulation from the view point of international harmonization.
Results in 2016 FY:
(1)Various deep and shallow cycle tests were conducted to evaluate the combination effect of mean pressure and pressure amplitude with 100L and 300L Type3 cylinders.
(2)Hydraulic pressure cycle tests were conducted and their failure mode were evaluated with 36L Type4 cylinders.
(3)18L Type2 test cylinders were manufactured and we started hydraulic pressure cycle tests.
(4)The stress rupture test and the fatigue test of CF are in progress.
1)We investigated the possibility of making it a reasonable design factor by using carbon fiber conforming to the characteristics of the liner.
2)The fatigue property of CFRP is likely to have properties associated with cracking of carbon fiber and resin besides the original fatigue property of carbon fiber.
3)CFRP does not show stress rupture clearly. Reduced strength of stress rupture is presumed to be due to room-temperature creep of resin material.
(5)The research is focused on Type 3 accumulator from the viewpoint of A6061 aluminum liner fatigue strength,and Type 4 accumulator from the viewpoint of fiber strength.
1)Life time strength evaluation of the Type3 accumulator;Type3 pressure vessel is modeled and analyzed.The result of stress analysis and fatigue cycle test is plotted in the design fatigue curve for 6016-T6.The relation between stress amplitude and fatigue cycle is reasonable,so the developed method is considered appropriate.
2)Life time strength evaluation of the Type4 accumulator;Fot modeling of Type4 FRP pressure vessel,liner shape and FRP stuructrue has to be modeled properly.Using the developed software called "FrontCOMP_tank",we created axisymmetric FE model of the vessel with taking into account the essential features.We performed the elastic stress analysis,and we found stress concentration at the innermost FRP hoop layer and the boss neck in the vessel.
3)Optimum design of Type2 accumulator;Design methodology to determine thickness of both steel liner and CFRP layer is developed based on best-fit curve of the s-n curve of steel specimen.
4)Effects of temperature change on the stress condition;Using the Type3 pressure vessel FE model developed, we analyzed the difference of the stress amplitude due to temperature change.With the temperature increasing,the stress amplitude goes high because the more compressive stress is applied due to the difference of the heat coefficients between aluminum liner and FRP layers.
(6)The documents and the patents of the inspection methods for CFRP accumulators are investigated and specialists' opinions are gathered.
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