caa a22 4500 467954887 CHVBK 20180405193746.0 cr unu---uuuuu 170328e20041201xx s 000 0 eng 10.1007/BF02637192 doi (NATIONALLICENCE)springer-10.1007/BF02637192 (NATIONALLICENCE)springer-10.1007/s00419-002-0235-8 Li X. College of Materials Science and Engineering, Gansu University of Technology, 85 Gong Ping, Lanzhou, 730050, Gansu, P.R. China aut Computational assessment of material structure weaknesses in polycrystalline materials [Elektronische Daten] [X. Li] Summary: By incorporating local grain orientation, grain geometry and macroscopic elastic properties, a numerical procedure has been developed for computational prediction of mesoscopic stress and strain distributions in simulated polycrystalline material samples. The numerical procedure is developed on the basis of the concept of grain-average fields, Kröner-Kneer model, Waldvogel-Rodin algorithm and a self-adaptive method. Repeated computer tests were performed to investigate mesoscopic stress variation in the samples, and find coherent interrelations of material structure weaknesses (MSWs) with local microstructure of the samples. It was found that the stronger the single crystal elastic anisotropy, the stronger the inhomogeneity of mesoscopic stress distribution. Not only the elastic anisotropy, but also the grain geometry, may produce significant local stress disturbances. It has been found that the defined ‘orientation-geometry factor' and ‘correlation parameter' are two adequate physical quantities which account for synergetic interactions due to grain-orientation geometry-induced anisotropy. By using the two quantities, MSWs can be well correlated with local microstructure. Computer tests also show that 250-400 conjoining grains are necessary to homogenize the mesoscopic stress distribution in the considered materials. Springer-Verlag, 2004 Polycrystalline material nationallicence Structure weakness nationallicence Grain orientation nationallicence Induced anisotropy nationallicence Average field nationallicence Self-adaptive method nationallicence Numerical procedure nationallicence Archive of Applied Mechanics Springer-Verlag 74/3-4(2004-12-01), 147-164 0939-1533 74:3-4<147 2004 74 419 https://doi.org/10.1007/BF02637192 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02637192 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Li X. College of Materials Science and Engineering, Gansu University of Technology, 85 Gong Ping, Lanzhou, 730050, Gansu, P.R. China aut NATIONALLICENCE 773 0- Archive of Applied Mechanics Springer-Verlag 74/3-4(2004-12-01), 147-164 0939-1533 74:3-4<147 2004 74 419 NATIONALLICENCE 100 1- Li X.-D College of Materials Science and Engineering, Gansu University of Technology, 85 Gong Ping, 730050, Lanzhou, Gansu, P.R. China aut NATIONALLICENCE 856 40 https://doi.org/10.1007/s00419-002-0235-8 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer