caa a22 4500 469124717 CHVBK 20180323133147.0 cr unu---uuuuu 170328e19921101xx s 000 0 eng 10.1007/BF00019750 doi (NATIONALLICENCE)springer-10.1007/BF00019750 Tirbonod B. (LWR) Safety Research Program, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland aut Acoustic emission sources modelled by dislocations [Elektronische Daten] [B. Tirbonod] Acoustic emission sources representing dislocations and cracks under tensile forces, shear forces or a combination of these forces are modelled by a single circular dislocation loop and by a continuous distribution of such loops. The medium is assumed to be linear, elastic isotropic, homogeneous and unbounded. The quasistatic and the point source approximations are assumed. The wave displacement induced by the expansion of a loop and of a continuous distribution of loops is calculated for a tensile and a shear source on the basis of the dynamic dislocation theory by using the Green's function formalism. The wave is given in terms of L-, SV- and SH-waves as a function of the expansion law of the source and is calculated in a simple case. The wave form, radiation pattern and the diameter of the source are calculated; the influence of the expansion time of the source and of the distance between the source and the observation point is discussed. The results are used to check the assumptions of linearity and elasticity. They are compared with experiments and applied to characterise the source from measurements. Kluwer Academic Publishers, 1992 International Journal of Fracture Kluwer Academic Publishers 58/1(1992-11-01), 21-53 0376-9429 58:1<21 1992 58 10704 https://doi.org/10.1007/BF00019750 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00019750 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Tirbonod B. (LWR) Safety Research Program, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 58/1(1992-11-01), 21-53 0376-9429 58:1<21 1992 58 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer