caa a22 4500 469124911 CHVBK 20180323133148.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF00048951 doi (NATIONALLICENCE)springer-10.1007/BF00048951 Pippan R. Erich-Schmid-Institut für Festkörperphysik, Österreichische Akademie der Wissenschaften, Jahnstr. 12, 8700, Leoben, Austria aut The condition for the cyclic plastic deformation of the crack tip: the influence of dislocation obstacles [Elektronische Daten] [R. Pippan] The stress intensity range below which no cyclic plastic deformation at the crack tip and, hence, no fatigue crack propagation occurs is investigated. The emission of dislocations from the crack tip is assumed as mechanism for the dislocation generation. For a mode III crack, a computer simulation is carried out to study the influence of dislocation obstacles. Both the distance between the crack tip and the obstacle and the strength of the obstacle are varied and the characteristic dislocation arrangements are shown. The stress intensity range necessary to return one dislocation to the crack tip is mainly controlled by the critical stress intensity factor sufficient to emit a dislocation. The influence of the obstacles is not very significant. Kluwer Academic Publishers, 1992 International Journal of Fracture Kluwer Academic Publishers 58/4(1992-12-01), 305-318 0376-9429 58:4<305 1992 58 10704 https://doi.org/10.1007/BF00048951 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00048951 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Pippan R. Erich-Schmid-Institut für Festkörperphysik, Österreichische Akademie der Wissenschaften, Jahnstr. 12, 8700, Leoben, Austria aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 58/4(1992-12-01), 305-318 0376-9429 58:4<305 1992 58 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer