The adhesion of ice to lubricated surfaces

The adhesion of ice to lubricated surfaces

LITERATURE AND CURRENT EVENTS Systematic Abstracts of Current For the Introductory 243 Literature Note see issue No. I of this volume, p. 81. Cl...

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LITERATURE AND CURRENT EVENTS

Systematic Abstracts of Current

For the Introductory

243

Literature

Note see issue No. I of this volume, p. 81.

Clcange of abbreviation T.P.A., the NASA abstracts, are now published as an abstracts Journal. STAR; Scientific and Technical Aerospace Reports, Vol. I (IgQ), biweekly; Wear, 6, No. I, p. 80.

for a review see

1. DEFORMATION AND FRACTURE (no abstracts) 2. ADHESION AND FRICTION 2.1

Adhesion

The Adhesion of Ice to Lubricated Smfaces. H. R. Baker, W. D. Bascom and C. R. Singleterry. Rep. of NRL Pyogr., (1962) 1-6; IO refs. Sci. and Tech. Aerospace Repls., I (4) (1963) 228. The adhesion of ice to lubricated steel has been shown to vary over a wide range, depending upon the polar organic additive present in the lubricating oil. The adhesion is least for systems showing contact angles of 170 degrees, or larger, through water drops on steel submerged in the oil solutions. The extremely low adhesions sometimes observed in such systems arise because water does not readily displace the final thin film of bulk oil from the metal surface to establish true water/ solid contact. High water-contact angles arc associated with strong adsorption of the polar additive at the oil/metal interface and with relatively low adsorption in the oil/water interface.

Adhesion and Cohesion. (&ok) Proceedings of a Symposium held at the General Motors Research Laboratories, Warren, Michigan, 1961, edited by Philip Weiss, Head of the Polymers Dept., Research Laboratories, G.M. Corporation, Warren, Mich., U.S.A.. Elsevier Publ. Co., Amsterdam, London,New York, 1962; 272 pp. Titles of chapters: P. J. W. Debye, Interatomic and intermolecular forces in adhesion and cohesion; J. P. Berry and A. M. Bueche, Ultimate strength of polymers; J. J. Bikerman, Science of adhesive joints; N. A. de Bruyne, The measurement of the strength of adhesive and cohesive joints; G. A. Ilkka and R. L. Scott, Impact testing of adhesive bonds; D. H. Kaelbe, The theory and analysis of

peel adhesion; J. H. Engel, Jr. and R. N. Fitswater, Adhesion of surface coatings as determined bythepeelmethod; W. K.Asbeck, Forces in coatings removal by knife cutting methods; F. P. Bowden, The adhesion of metals and the influence of surface contamination and topography; D. J. Harvey, The wetting of metals by lead alloys ; S. L. Reegen and G. A. Ilkka. The adhesion of polyurethanes to metals: W. A. Zisman, Constitutional effects on adhesion and abhesion; T. J. Mao and S. L. Reegen, Adhesion of some acrylic polymers and copolymers; S. B. Newman and I. Wolock, Microscopy of color phenomena in polymer fracture; H. F. Mark, Future trends for improvement of cohesive and adhesive strength of polymers. (For a review see page 242.)

Effects of Couple-Stresses in Linear Elasticity. R. D. Mindlin and H. F. Tiersten, (1962); 69 pp., rg refs. Sci. and Tech. Aerospace Reps. I (I) (1963) 83. N 63-roa85, Columbia University, New York. In a theory of deformation of continua, originated by Voigt and amplified by E. and F. Cosserat, the couple per unit area acting across a surface within a material volume or on its boundary was taken into account in addition to the usual force per-unit area. Some typical effects of such “couple-stresses” are exhibited in the present paper by means of solutions to problems of wave-propagation, vibration, stress-concentration and nuctei of strain - all within the framework of a linearized form of the couple-stress theory for perfectly elastic, centrossymmetric-isotropic materials. Weav, 6 (19633 243-255