کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7177873 | 1467059 | 2015 | 49 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A minimum principle for microstructuring in rigid-viscoplastic crystalline solids
ترجمه فارسی عنوان
حداقل اصل برای ریزساختار در جامدات کریستالی سخت و صیقلی است
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کلمات کلیدی
پلاستیک کریستال، مرز بلوک سلولی، ریز ساختار، حداقل اصل،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
A minimum plastic power principle is proposed for a rigid-viscoplastic crystalline domain subdivided into two sets of lath-shaped regions, called bands. The lattice orientation in each band is assumed uniform and to differ infinitesimally from that in the other band. The proposed minimum principle yields the slip activity in the bands and semi-analytical expressions for the misorientation axis and orientation of band boundaries. These band boundary characteristics are predicted for f.c.c. lattice orientations near the ideal rolling texture components. Surprisingly, it found that the predicted band boundary characteristics closely match those of microstructural features called cell block boundaries reported in the experimental literature, except when the dislocations of activated slip systems are known to interact very strongly. This suggests that except when precluded by strong dislocation interactions, continuum extremum principles may also govern microstructural characteristics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanics and Physics of Solids - Volume 84, November 2015, Pages 39-58
Journal: Journal of the Mechanics and Physics of Solids - Volume 84, November 2015, Pages 39-58
نویسندگان
Sivasambu Mahesh,