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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1185-1
ISBN: 978-0-8031-1185-1
... calculated. This is applied with reasonable success to the standard helicopter loading spectra Helix and Felix, and a much simplified version of Helix is proposed that consists of repetitions of a single typical flight. fatigue (materials) stress strain cracking (fracturing) plastic deformation...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1989
ISBN-10: 0-8031-1194-0
ISBN: 978-0-8031-1194-3
... equipment cleaning helicopters homogenizers (mixere-mulsifiers) hydrofoils low toxicity chemical agents oil spills submarines viscoelasticity William B. Katz 1 A New Pair of Eyes II. Looking at Dispersants from a Different Point of View REFERENCE: Katz, W. B., "A New Pair of Eyes II. Looking...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1987
ISBN-10: 0-8031-0936-9
ISBN: 978-0-8031-0936-0
... Avoriaz, a third generation ski-resort, located in the French Northern Alps, has been using, since the 1983/1984 winter season, a helicopter as a means of transportation for injured people. The Medical Center is located in the very heart of the resort and, moreover, in the very heart of a chair...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1984
ISBN-10: 0-8031-0400-6
ISBN: 978-0-8031-0400-6
... equipment has been developed. The areas of modernization include (1) upgrading the marine vessel equipment, (2) dedicating boats and vessels of opportunity for dispersant application, (3) using helicopters for spill response, (4) using large fixed-wing aircraft for spill response, and (5) establishing...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1979
ISBN-10: 0-8031-4495-4
ISBN: 978-0-8031-4495-8
... Fatigue is one of the most critical design considerations for a helicopter, especially its rotor blades. The acceptance of glass fiber reinforced composites for the rotor blade structure has created a need for fatigue data. The fatigue testing described here was undertaken to determine which...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1977
ISBN-10: 0-8031-4490-3
ISBN: 978-0-8031-4490-3
..., whereas endurance limit stresses (runouts) are associated with static proportional limit values, when they occur, and internal damage. The significance of these room temperature-dry data on the design allowables and weight of aerodynamic structures is discussed. Such structures are helicopter rotor blades...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1975
ISBN-10: 0-8031-0597-5
ISBN: 978-0-8031-0597-3
... of additional stations. monitors water pollution tests swamps helicopters stations sampling D. F. Thomas, Jr.' An Automated Remote Marshland Water Sampling Station REFERENCE: Thomas, D. F., Jr., "An Automated Remote Marshland Water Sampling Station," Water Pollution Assessment: Automatic Sampling...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1974
ISBN-10: 0-8031-0308-5
ISBN: 978-0-8031-0308-5
... The advantages and disadvantages of all composite helicopter drive shafts are discussed. Previous research has shown that all graphite/epoxy torque tubes severely delaminate under low-velocity, low-energy impact tests simulating accidental “tool drop” conditions. In response to the need...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1973
ISBN-10: 0-8031-0115-5
ISBN: 978-0-8031-0115-9
... substantial potential for helicopter rotor blades because of improved fatigue capability, good damage tolerance, and ability to be molded in complex aerodynamic configurations. This chapter summarizes the major design considerations in VTOL aircraft and reviews composite hardware which has been developed...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1973
ISBN-10: 0-8031-0115-5
ISBN: 978-0-8031-0115-9
... The development of fiber reinforced resin-bonded structural composite materials has created a new degree of design flexibility for the helicopter engineer. The development and commercial availability of glass fibers, carbon or graphite fibers, and boron fibers, with their attendant widely...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1971
ISBN-10: 0-8031-0031-0
ISBN: 978-0-8031-0031-2
... Design criteria are presented for the residual strength and life of fatigue loaded helicopter structures. The crack propagation rate methods and data are reviewed, and a bilinear semilog method is shown to be most accurate for predicting residual life. The methods developed are compared...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1966
ISBN-10: 0-8031-6627-3
ISBN: 978-0-8031-6627-1
... A technique is described whereby helicopter rotor blade service life can be substantiated by combining laboratory fatigue tests with cyclic loading applied during conventional ground endurance tests of rotor control and power-transmission systems. The method for applying cyclic loading involves...