Author: Samuel Kelly Clark
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 90
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Book Description
A theoretical and experimental investigation of the feasibility of determining the mechanical properties of aircraft tires from small-scale model tires was accomplished. The theoretical results indicate that the macroscopic static and dynamic mechanical properties of aircraft tires can be accurately determined from the scale model tires although the microscopic and thermal properties of aircraft tires can not. The experimental investigation was conducted on a scale model of a 40 x 12, 14 ply rated, type 7 aircraft tire with a scaling factor of 8.65. The experimental results indicate that the scale model tire exhibited the same static mechanical properties as the prototype tire when compared on a dimensionless basis. The structural modeling concept discussed in this report is believed to be exact for mechanical properties of aircraft tires under static, rolling, and transient conditions.
Author: S.K. CLARK
Publisher:
ISBN:
Category :
Languages : en
Pages : 68
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Book Description
Author: Kyle Schmidt
Publisher: SAE International
ISBN: 1468604635
Category : Transportation
Languages : en
Pages : 135
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Book Description
Landing gear provides an intriguing and compelling challenge, combining many fields of science and engineering. Designed to guide the interested reader through aircraft tire design, selection, and integration to the aircraft landing gear, this book presents a specific element of landing gear design in an accessible way. The author’s two volume treatise, The Design of Aircraft Landing, was the inspiration for this book. The Design of Aircraft Landing is a landmark work for the industry and utilizes over 1,000 pages to present a complete, in-depth study of each component that must considered when designing an aircraft’s landing gear. While recognizing that not everyone may need the entire treatise, Aircraft Tires: Key Principles for Landing Gear Design is one of three quick reference guides focusing on one key element of aircraft design and landing gear design. This volume features tire construction and terminology, mechanics of pneumatic tires, tire performance and modeling as well reviewing undesirable tire behavior. R. Kyle Schmidt has over 25 years’ experience across three countries and has held a variety of variety of engineering roles relating to the development of new landing gears and the sustainment of existing landing gears in service.
Author: Dheeraj Chaitanya Thotakura
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 65
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Book Description
The aim of this research is to develop a methodology which can be utilized to certify an aircraft for tire debris impact onto structural components and also to predict structural response by numerical simulation. After the aircraft experiences a tire burst scenario, tire debris projected from the rotating tire can impact the structural components of the aircraft. European Aviation Safety Agency's notice of proposed amendments (CS 25.734) demonstrated that the structural components and systems which are essential to the safe operation of aircraft should be protected from the damaging effects of tire debris. In this study, a computational methodology is developed to model and analyze the effects of tire debris impact on aircraft structural components. Experimental data from the tire fragment impact test on to the aluminum plate is compared with the numerical data to validate the tire debris model developed in this study. Parametric study is then conducted on validated tire debris model by impacting it onto the aircraft inboard flap. Inboard flaps are one of the major structural parts which are located in the zone of vulnerability defined by European Aviation Safety Agency and Federal Aviation Administration. Structural deformations and energy analysis on inboard flap by impacting tire debris model at two locations for different angle of attack and varying impact velocities are to be considered for this study. Detailed geometry of the inboard flap for the aircraft and tire debris are modeled in Catia V5 R21. Finite element modeling and fastener connections are defined in Altair Hypermesh 12.0. Material properties and boundary conditions are defined in LS-Prepost 4.2. This study provides a computational methodology to certify aircraft as per certification standards. This methodology provides design engineers the effects of tire debris impact on a structural component and also to change initial design requirements for structural components.
Author: Pamela A. Davis
Publisher:
ISBN:
Category : Damping (Mechanics)
Languages : en
Pages : 48
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Book Description
Author:
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 260
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722771157
Category :
Languages : en
Pages : 96
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Book Description
The National Tire Modeling Program (NTMP) is a joint NASA/industry effort to improve the understanding of tire mechanics and develop accurate analytical design tools. This effort includes fundamental analytical and experimental research on the structural mechanics of tires. Footprint local forces, areas, and aspect ratios were measured. Local footprint forces in the vertical, lateral, and drag directions were measured with a special footprint force transducer. Measurements of the local forces in the footprint were obtained by positioning the transducer at specified locations within the footprint and externally loading the tires. Three tires were tested: (1) one representative of those used on the main landing gear of B-737 and DC-9 commercial transport airplanes, (2) a nose landing gear tire for the Space Shuttle Orbiter, and (3) a main landing gear tire for the Space Shuttle Orbiter. Data obtained for various inflation pressures and vertical loads are presented for two aircraft tires. The results are presented in graphical and tabulated forms. Howell, William E. and Perez, Sharon E. and Vogler, William A. Langley Research Center...
Author:
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 322
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 652
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
Publisher:
ISBN:
Category : Computer simulation
Languages : en
Pages : 192
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Book Description
