成果報告書詳細
管理番号20110000001737
タイトル*平成22年度中間年報 水素製造・輸送・貯蔵システム等技術開発 水素インフラ等に係る基準整備に関する研究開発 水素ステーション用複合容器の設計・評価に関する研究開発
公開日2012/2/17
報告書年度2010 - 2010
委託先名国立大学法人東京大学
プロジェクト番号P08003
部署名新エネルギー部
和文要約和文要約等以下本編抜粋:1. 研究開発の内容及び成果 本研究開発では、水素ステーション用蓄圧器として活用が見込まれているA6061-T6ライナーCFRP製複合容器の開発において、燃料電池自動車高圧水素タンクと最も大きく異なる疲労強度設計に焦点を絞り、複合容器の設計、評価に関する基準の整備に資する基本事項の検討を行う。平成22年度の研究開発としては、以下の(1)疲労強度評価試験計画の策定と(2)小型複合容器の基本設計を実施した。
(1)労強度評価試験計画の策定
水素ステーションで実用される複合容器は現在開発途上であり実在しない。その開発に資する疲労試験データを効率よく得るためには、平均応力と応力振幅を網羅的に変更した試験を実施するのではなく、設計に関する不確定要素を見込みながらも想定される応力条件に近い状態で試験を実施する必要がある。そのような応力条件を決定するため、燃料電池自動車用として開発された複合容器に関する知見から類推して、実用蓄圧器となりえるであろう設計の候補を複数定めるため、有限要素解析による最適設計を行った。
英文要約Title:Development of Technologies for Hydrogen Production, Delivery, and Storage Systems. Development for Regulation of Hydrogen Infrastructure. Development for Design and Assessment Methodology of Composite Vessel for Hydrogen Station (FY2010-FY2012) FY2010 Annual Report

This project is organized for investigation of fatigue strength of A6061-T6 liner for Carbon Fiber Reinforced Plastic (CFRP) accumulator in hydrogen filling station. Results of the project will be utilized for concerning regulation. (1)Feasibility Study of Accumulator Over 100,000 Cycles of Filling: Preliminary investigation of design of accumulator is curried our in terms of the finite element analysis. Candidates of design are investigated by using three layers cylinder model, which consists of A6061-T6 liner, hoop and helical wound CFRP layers. The minimum weight design is searched for under the condition of internal pressure:100MPa, internal diameter of the cylinder: 300mm, external diameter of boss: 50mm. The optimum design of hoop and helical wound CFRP layers is decided for fixed thickness and maximum principle stress of liner by means of membrane theory. Starting from the theoretical optimum design, the minimum weight search is performed by successive changes of three layers thickness under the constraint of maximum principle stress in liner evaluated by the finite element analysis. The liner is handled as isotropic elastic body characterized by Young's modulus: 68.3GPa, Poisson ration: 0.3, and mass density:2700kg/m3. The CFRP layers are orthogonal anisotropic bodies, the constitutive laws of which are derived from rule of mixture of carbon fiber characterized by Young’s modulus: 230.0 GPa, Poisson ration: 0.28, and mass density: 1800kg/m3, and epoxy resin by Young's modulus:3.0GPa, Poisson ration:0.35, and mass density: 1300kg/m3. Empirical knowledge obtained by development of CFRP tank for fuel cell vehicle predicts over 100,000 cycles lifetime for accumulator of under 200MPa stress range in liner. The principle stress range of 200MPa is realized in the minimum weight design of liner thickness 20mm, helical thickness 25mm and hoop thickness 65mm. The weight of cylinder is 250kg per one meter, which is drastically lower than the expected weight of steel accumulator. We conclude that the fatigue test of liner is adequately conducted by aiming at stress range of 200MPa. (2) Design of Vessel for Pressurized Cycle Test: The finite element analyses are curried out to search for the adequate thickness of helical and hoop layer of CFRP vessel using A6061-T6 liner of 103mm outer diameter. The material constants of the liner are identified through tensile test by using three specimens carved from the liner. The liner is characterized by Young’s modulus: 71.6GPa, Poisson ratio: 0.32, yield stress: 302MPa, tensile strength: 346MPa. The pressure cycle is ranged 0⇔20MPa. Thicknesses of three layers of CFRP are fixed as hoop layer 0.88mm, helical 1.24mm and hoop 0.88 so as to limit the principle stress range in liner within 200 MPa. Adequate autofrattage pressure is searched for as 37MPa by iterative elasto-plastic analyses of finite element method. Preliminary cycle tests are operated for two CFRP vessels manufactured by the design. They hold 100,000 cycles pressure.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る