Research Article
Oct 1970
Impact of Spheres on Ice
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VIEW THE REPLYAuthors: Yin-Chao Yen, Fuat Odar, AM.ASCE, and Lynnwood R. BracyAuthor Affiliations
Publication: Journal of the Engineering Mechanics Division
Volume 96, Issue 5
Abstract
An oscilloscopic method for determining the coefficient of restitution, e, by impact of spheres on ice was developed. Teflon, acrylic, nylon, and steel spheres having 1/4-in., 1/2-in., 3/4-in., and 1-in. diameter were used. The experiments were conducted at -1°C, -10°C, and -20°C, respectively. With the exception of Teflon spheres, the coefficient of restitution is found to decrease with the diameter of the sphere and increase as the temperature is lowered. All the data can be well represented by an exponential expression in terms of impact velocity Vi in a form of e = A exp (-B Vi) with correlation coefficients in the range of 0.91 to 0.99. The occurrence and extent of ice cracking were found to depend on the sphere material, diameter, temperature, and impact velocity.
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Published In
Journal of the Engineering Mechanics Division
Volume 96 • Issue 5 • October 1970
Pages: 641 - 652
Copyright
© 1970 American Society of Civil Engineers.
History
Published in print: Oct 1970
Published online: Feb 3, 2021
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Affiliations
Yin-Chao Yen
Chief; Physical Sciences Branch, U.S. Army Cold Regions Res. and Engrg. Lab., Hanover, NH
Fuat Odar, AM.ASCE
Res. Physical Sci.; Westinghouse Electric Corp., Bettis Atomic Power Lab., West Mifflin, PA
Lynnwood R. Bracy
Physical Sci. Asst., U.S. Army Cold Regions Res. and Engrg. Lab., Hanover, NH
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.