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IN this chapter technical applications of the solid friction concept in four different fields are discussed. These are: (1) mechanical engineering, (a) damping of unwanted vibrations in machinery—for instance, crank‐shaft vibrations, (b) vibrations excited by internal friction—for instance,...
An easily constructed apparatus is described for applying tension and compression stresses to metal and alloy samples while being subjected to x‐ray diffraction analysis. The back reflection technique is employed in which diffraction patterns can be photographed in five minutes or less. The...
An expression is derived for the mutual impedance of a symmetrical center‐driven antenna in proximity to an untuned parasitic element, when the wires are parallel, and are not displaced in length. An integral, frequently occurring in antenna problems, is evaluated graphically over the range...
A study was made of thin films of aluminum, cadmium, copper, gold, magnesium, and zinc using an RCA electron microscope capable of 30A resolving power. The films were formed by evaporation and condensation on collodion substrates in vacuum. An evaporating chamber was devised that permitted...
If a rod is twisted while subjected to longitudinal compression it will support without fracture angles of twist many‐fold greater and maximum torques somewhat greater than is possible in the absence of load. Under compressional load the curve of shearing stress against shearing strain rises to...
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