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Predecessor
Volume 35, Issue 1
Displaying 1-7 of 7 articles from this issue
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Katsuyuki KAKEI1997 Volume 35 Issue 1 Pages 2
Published: January 25, 1997
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSDownload PDF (1935K) -
A new basic technologyShigeru NAKAGIRI1997 Volume 35 Issue 1 Pages 3-8
Published: January 25, 1997
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSThe paper introduces the state-of-the- art of Fiber Reinforced Plastic (FRP) vessels, especially high pressure gas containers in Japan, and discusses the pros and cons of the FRP vessels to steel vessels. Emphasis is laid on compressed natural gas (CNG) containers aboard automobile vehicles. The outline of the standards applied to the CNG containers is described briefly. Low temperature containers used for liquefied natural gas aboard vehicles are also mentioned.View full abstractDownload PDF (773K) -
Tadashi NARUSHIMA1997 Volume 35 Issue 1 Pages 9-14
Published: January 25, 1997
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSNatural Gas Vehicles (NGVs) were introduced into Japan to improve the serious air pollution problem in the cities and to reduce Japan's dependence on petroleum. NGVs are targeted to replace city route buses, garbage trucks, good delivery trucks, etc.
The target for NGV promotion by the year 2000 is 200, 000 vehicles together with appropriate infrastructure of refueling facilities.
Japanese government supports promotion of NGVs by deregulating of laws and giving several incentives such as subsidies and taxation relief. The key issue for the commercialization of NGV is discussed.
Secondly, current status of development and utilization of NGV cylinders are described, comparing the weight of various types of cylinders and their adoption to newly designed vehicles.View full abstractDownload PDF (667K) -
Tatsumi TAKEHANA, Hiroshi OTA1997 Volume 35 Issue 1 Pages 15-20
Published: January 25, 1997
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSTwenty years have passed since first FRP composite cylinder appeared in commercial market. Standardization of composite cylinders has extensively advanced in many countries and related organization.
Design philosophy for composite cylinders is different from those for metallic cylinders. For example, service period and maximum number of filling cycles are specified at a limited level in order both to pursue light weight and to assure the safety at once. This report explains ondesign technique of FRP composite cylinders and some of related standards enacted in a number of countries.View full abstractDownload PDF (652K) -
Masanori KAWAHARA1997 Volume 35 Issue 1 Pages 21-25
Published: January 25, 1997
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSFilament winding technology is now extensively used in commercial manufacture of FRP pressure vessels such as air cylinders for fireman's breathing appatus, oxygen containers for medical uses, and fuel gas containers for natural gas vehicles, developped since several years.
This paper describes basic concept of filament winding technology, procedure to determine the winding paths based on the geodesic curves, elements of winding machine, design concepts based on the properties of unidirectional reinforced composites. The advantages and disadvantages of filament winding were discussed together with the items of research for further progress of the technology.View full abstractDownload PDF (569K) -
Hiroo DOMAE1997 Volume 35 Issue 1 Pages 26-32
Published: January 25, 1997
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSThe FRP Composites cylinder, historically developed for aero-space and military use in US, was on the public market firstly in 1976 as the high pressure air vessel for fire-man's self containing breathing apparatus (SCBA). In Japan, the FRP cylinder for SCBA has been become popular since 1987, when Teijin introduced and started to commercialize a series of cylinders of SCI (US) with the trade name of “Ultressa”.
Significant advantages of FRP cylinders are, 1) its lightness (a half of steel cylinder in weight), and, 2) its structural safety (so-called “leak before burst mode”). Physiologically favorable effect for fireman by reducing the cylinder weight was experimentally certified by T. Koto, as summarized in the paper. Nowadays, because of these advantages, almost all of SCBA cylinders supplied to fire stations changed to FRP composite one.
In response to requirement for more lighter weight, carbon fiber wrapped cylinder has been developed and coming into practical use. We look forward to being in Japanese market in near future.View full abstractDownload PDF (728K) -
Masanori KAWAHARA, Tatsumi TAKEHANA1997 Volume 35 Issue 1 Pages 33-37
Published: January 25, 1997
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSFRP, is now well known as light and high strength materials for structural components, and widely used in aeronautic and astronautic equipments, sports goods, automobile components, and high pressure gas containers.
This paper describes mechanical properties of FRP, reinforced by carbon, aramide, or glass fibers, in comparison with other various materials. Basic design concept for FRP is presented together with the data trends of long term strength in stress rupture and fatigue. A short explanation is given on the items for design qualification tests in current design standard for FRP pressure vessels.View full abstractDownload PDF (1925K)
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