Now showing items 21-30 of 35
Stacking faults in platinum
Determination by X-ray techniques of stacking-fault densities in platinum was attempted. Heavily deformed platinum was annealed under varying conditions of temperature and time. The X-ray method used for measuring ...
Electron emission from aluminum as a result of plastic strain
Aluminum was strained in tension under a Geiger counter. Electron emission associated with plastic deformation and subsequent delayed emission was observed. The specimens were illuminated during both the growth and decay ...
A study of the quasi-frictional forces resulting on serrated clamping elements
It is intuitive that a clamping element will grip better if the surface is provided with teeth which penetrate Into the surface of the clamped object. This paper is concerned with the problem of determining a quantitative ...
A two dimensional photoelastic study of stress and load distribution in a rock bit cutter
A two dimensional photoelastic analysis was carried out on a rock bit cutter shell. The magnitude of the principle stresses in the cutter shell and the load distribution in the roller bearings was determined. Some conclusions ...
Effect of vibrations on the yield strength of a low carbon steel
Experimental results show that, when a specimen is subjected to vibration in the frequency range from 15 kc to 80 kc, the steady stress necessary to cause plastic deformation is appreciably reduced. This reduction is ...
The design of a model for studying vibrations in rotary drilling strings
Dimensional analysis methods are used in designing a model rotary drilling string on which vibrational studies may be made. Practical considerations and limitations of materials necessitate making various approximations, ...