Elsevier Sequoia S.A., Lausanne - Printed in the Netherlands
Systematic Abstracts of Current
Continued from Wear, II (1968) 384-392; for introductory note see lYenr, II (1968) 304. A:otes (i) Since the introduction was written an additional source of titles has become available: Curve& Contents, Physical Sciences, published by ISA. (ii) Titles of papers published in Jouvlanl of ~~b~~cat~o~ T~c~.na~~gy (JOLT] 1967 (for a review see Iwear, or (1968) 383) are listed together in this issue. This wilI enable readers to judge the scope and significance of the new journal.
Groundwork Laid for Significant Advances in Tribology. Anon., il/letaZZurgia, 77 (462) (April 1968) 151. Biomechanics : Its Scope, History, and some Problems of Continuum Mechanics in Physiology. Yuan-Cheng I3. Fung, A&%. iil’eck. Rev., 21 (I) (1968) 1-20; 7 figs., many refs. Historical background. What’s in a name? Scope of the present review. Material properties. Soft tissues. Elasticity in simple elongation. History-dependent part of the stressstrain relationship. Stress-strain history law in three dimensions. Comments on data collection. BioiogicaI gel. Hard tissues. Boundary-value problems. The law of Laplace. Wave propagation in blood fIow. Microcirculation. The red blood cell. The motion of the red cell and other suspensions. Animal locomotion and other problems. Conclusion. Bibliography. Principles and New Methods of Air Separation. (in German) H. Rumpf and K. Leschonski, Ckem.-lng. Tech., 3p (21) (1967) 1231~1zq1; 16 figs., 22 refs
The direction of motion of isolated single particles on air separation is influenced by the interaction between wall, flow medium, and particles; interactions which also superimpose a stochastic component of motion. As a result different variables apply for the various possible separation arrangements and for the batchwise and continuous separations. Expressions for the calculation of a number of characteristic phenomena, and some of the results obtained, are given. The results obtained from the investigation of two newly deveioped analytical separators and from the investigation of a transverse flow separator which could be suitable for technical separations are discussed.
I. DEFORMATION, TURE
Localized Damage of Metal Crystals by Laser Irradiation. T. J. Baston and F. P. Bowden, Kiature, 218 (5137) (1968) 150..152; 5 figs., 6 refs. Isolated and highly symmetrical craters about IO ,u in diameter can be formed on metal crystals by intense pulses of light from a laser. They may be caused by a localized plasma discharge at the surface. On Cumulative~collapse of Cavitation Cavities. S. P. Xozirev, Tmns. ASME, Ser. D, (J. Basic Eng.), po (I) (1968) 116.
2. SURFACE PROPERTIES, BND FRICTION
Surface Effects on the Mechanical Properties of Nonmetals. J. H. Westbrook, Res. and Develop. Application Service, General Electric, G.E. Re$ort No. 68-C-017, January rg68; 20 pp., 32 figs., r32 refs. To be published in Proc. 1967 Sagomeye Con,f. (in the press). Among the surface factors that effect the mechanical properties of nonmetals are geometry, composition, stress, and environment-both chemical and physical. Recent findings on the influence of these factors on the properties of both crystalline and vitreous materials are reviewed. Whereaspreviously most effects of surface factors in nonmetaltics were examined in terms of the fracture process, it is now realized that the plastic deformation process can also be affected. Recent experiments have even directly demonstrated the effects of environment on dislocation mobility. $vt?aY,I2 (1968) 137-147