title: Experimental researches of propagation of acoustic compression pulses in copper wires.
abstract: The results of experimental research related to the propagation of elastic-plastic compression pulses in polycrystalline copper wires are presented. We have developed a technique of generating compression pulses with amplitudes of pressure exceeding 100 MPa; this essentially exceeds the elasticity limit of copper. This allows us to carry out the research for the propagation of compression pulses in copper wire (as simples). Significant influence of the pulse amplitude on its spectrum, velocity and absorption will be discussed. The experiments showed that as the amplitude of the pulse increase the pulses velocity is decreased and absorption will be increased. The pulse spectrum also changes correspondingly. The analysis and discussion of experimental results will be presented through the context.
authors.affiliation: Department of Acoustic, Faculty of Physics, M.V. Lomonosov Moscow State University, GSP-II, Leninskye Hill, 119992 Moscow, Russian Federation.
authors.forename: A I
authors.initials: AI
authors.lastname: Korobov
authors.forename: Yu A
authors.initials: YA
authors.lastname: Brazhkin
authors.forename: Wang
authors.initials: W
authors.lastname: Ning