Quasi-Static and Dynamic Response Characteristics of F-4 Bias-Ply and Radial-Belted Main Gear Tires
Quasi-Static and Dynamic Response Characteristics of F-4 Bias-Ply and Radial-Belted Main Gear Tires

Author: National Aeronautics and Space Adm Nasa

Publisher: Independently Published

Published: 2018-10-25

Total Pages: 46

ISBN-13: 9781729239940

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An investigation was conducted at Langley Research Center to determine the quasi-static and dynamic response characteristics of F-4 military fighter 30x11.5-14.5/26PR bias-ply and radial-belted main gear tires. Tire properties were measured by the application of vertical, lateral, and fore-and-aft loads. Mass moment-of-inertia data were also obtained. The results of the study include quasi-static load-deflection curves, free-vibration time-history plots, energy loss associated with hysteresis, stiffness and damping characteristics, footprint geometry, and inertia properties of each type of tire. The difference between bias-ply and radial-belted tire construction is given, as well as the advantages and disadvantages of each tire design. Three simple damping models representing viscous, structural, and Coulomb friction are presented and compared with the experimental data. The conclusions discussed contain a summary of test observations. Davis, Pamela A. Langley Research Center RTOP 505-63-10-02

Intellectual Property Rights, Development, and Catch Up
Intellectual Property Rights, Development, and Catch Up

Author: Hiroyuki Odagiri

Publisher: Oxford University Press

Published: 2010-04-08

Total Pages: 464

ISBN-13: 0199574758

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For most countries, economic development involves 'catching up' with leading countries. This needs more than physical assets and labour: it requires technological capabilities, educational attainment, entrepreneurship, and development of the necessary institutional infrastructure, including intellectual property rights, particularly patents.

Quasi-Static Viscoelasticity Loading Measurements of an Aircraft Tire
Quasi-Static Viscoelasticity Loading Measurements of an Aircraft Tire

Author: Angela J. Mason

Publisher:

Published: 1997

Total Pages: 28

ISBN-13:

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Stair-step loading, cyclic loading, and long-term relaxation tests were performed on an aircraft tire to observe the quasi-static viscoelastic response of the tire. The data indicate that the tire continues to respond viscoelastically even after it has been softened by deformation. Load relaxation data from the stair-step test at the 15000-lb loading was fit to a monotonically decreasing Prony series.

Vehicle Crash Mechanics
Vehicle Crash Mechanics

Author: Matthew Huang

Publisher: CRC Press

Published: 2002-06-19

Total Pages: 499

ISBN-13: 142004186X

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Governed by strict regulations and the intricate balance of complex interactions among variables, the application of mechanics to vehicle crashworthiness is not a simple task. It demands a solid understanding of the fundamentals, careful analysis, and practical knowledge of the tools and techniques of that analysis. Vehicle Crash Mechanics s