NDLI: Testing techniques for determining static mechanical properties of pneumatic tires

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Testing techniques for determining static mechanical properties of pneumatic tires

Content Provider	NASA Technical Reports Server (NTRS)
Author	Nybakken, G. H. Dodge, R. N. Larson, R. B. Clark, S. K.
Copyright Year	1974
Description	Fore-aft, lateral, and vertical spring rates of model and full-scale pneumatic tires were evaluated by testing techniques generally employed by industry and various testing groups. The purpose of this experimental program was to investigate what effects the different testing techniques have on the measured values of these important static tire mechanical properties. The testing techniques included both incremental and continuous loadings applied at various rates over half, full, and repeated cycles. Of the three properties evaluated, the fore-aft stiffness was demonstrated to be the most affected by the different testing techniques used to obtain it. Appreciable differences in the fore-aft spring rates occurred using both the increment- and continuous-loading techniques; however, the most significant effect was attributed to variations in the size of the fore-aft force loop. The dependence of lateral stiffness values on testing techniques followed the same trends as that for fore-aft stiffness, except to a lesser degree. Vertical stiffness values were found to be nearly independent of testing procedures if the nonlinear portion of the vertical force-deflection curves is avoided.
File Size	2951084
Page Count	50
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19740017443
Archival Resource Key	ark:/13960/t5x688f18
Language	English
Publisher Date	1974-06-01
Access Restriction	Open
Subject Keyword	Aircraft Mechanical Properties Equipment Specifications Performance Tests Inflatable Structures Landing Gear Aircraft Tires Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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