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Structural properties of impact ices accreted on aircraft structuresThe structural properties of ice accretions formed on aircraft surfaces are studied. The overall objectives are to measure basic structural properties of impact ices and to develop finite element analytical procedures for use in the design of all deicing systems. The Icing Research Tunnel (IRT) was used to produce simulated natural ice accretion over a wide range of icing conditions. Two different test apparatus were used to measure each of the three basic mechanical properties: tensile, shear, and peeling. Data was obtained on both adhesive shear strength of impact ices and peeling forces for various icing conditions. The influences of various icing parameters such as tunnel air temperature and velocity, icing cloud drop size, material substrate, surface temperature at ice/material interface, and ice thickness were studied. A finite element analysis of the shear test apparatus was developed in order to gain more insight in the evaluation of the test data. A comparison with other investigators was made. The result shows that the adhesive shear strength of impact ice typically varies between 40 and 50 psi, with peak strength reaching 120 psi and is not dependent on the kind of substrate used, the thickness of accreted ice, and tunnel temperature below 4 C.
Document ID
19870008688
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Scavuzzo, R. J.
(Akron Univ. Akron, OH, United States)
Chu, M. L.
(Akron Univ. Akron, OH, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Structural Mechanics
Report/Patent Number
NASA-CR-179580
NAS 1.26:179580
Accession Number
87N18121
Funding Number(s)
CONTRACT_GRANT: NAG3-479
PROJECT: RTOP 505-68-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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