caa a22 4500 465741991 CHVBK 20180323111810.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF00018344 doi (NATIONALLICENCE)springer-10.1007/BF00018344 Li Chingshen Department of Mathematics and Mechanics, Taiyuan University of Technology, 030024, Taiyuan, Shanxi, Peoples' Republic of China aut On the interaction among stage I short crack, slip band and grain boundary: a FEM analysis [Elektronische Daten] [Chingshen Li] A FEM model of a stage I short crack in polycrystals was constructed based on the micromechanics and the physical process of its growth. The effective stress and effective plastic strain at the growing stage I short crack tip is slightly affected by the coplanar slip except in the vicinity of the grain boundary. Stage I growth is a mode transition process from pure shear to pure tensile, which is governed by the interaction among the crack, the slip at the crack tip and the approached grain boundary. The coplanar slip at the stage I crack tip enhances plastic CTSD and promotes the shear mode growth, nevertheless the grain boundary hindering the coplanar slip promotes the tensile mode growth. The apparent fast growth of stage I short cracks is accounted for by the enhanced CTSD resulting from the micro-plasticity in the coplanar PSB at the crack tip; and the minimum growth tate in the vicinity of a grain boundary is correlated with the expended CTSD and internal stress due to incompatible deformation at the boundary. The closure of stage I short crack in the first grain on the path is negligible, but dramatically increases as the crack deflects at the boundary entering into the second grain on its path. Kluwer Academic Publishers, 1990 International Journal of Fracture Kluwer Academic Publishers 43/3(1990-06-01), 227-239 0376-9429 43:3<227 1990 43 10704 https://doi.org/10.1007/BF00018344 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00018344 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Li Chingshen Department of Mathematics and Mechanics, Taiyuan University of Technology, 030024, Taiyuan, Shanxi, Peoples' Republic of China aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 43/3(1990-06-01), 227-239 0376-9429 43:3<227 1990 43 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer