ON THE RADIATION OF ELASTIC ENERGY FROM NON-UNIFORMLY MOVING DISLOCATIONS,
Abstract
The rate of energy radiated from a dislocation which is, on its path through the lattice, alternately accelerated and decelerated on account of external and internal stresses can be several orders of magnitude higher than the power emitted from a dislocation which vibrates around its equilibrium position. A periodically accelerating dislocation radiates, in general, not only the fundamental frequency, which is determined by the average velocity of the dislocation and the distance between obstacles, but also higher harmonics. The stress required to compensate for the energy loss is, for dislocation velocities which are well below the sound velocity, proportional to the second power of the velocity amplitude and independent of the average velocity. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1969
- Accession Number
- AD0691058
Entities
People
- Peter Gruner
Organizations
- Boeing