کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
771919 897672 2008 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multiparametric sufficient criterion of quasi-brittle fracture for complicated stress state
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Multiparametric sufficient criterion of quasi-brittle fracture for complicated stress state
چکیده انگلیسی
Behaviour of an atomic structure in the vicinity of the crack tip is simulated. Buckling and postbuckling deformation of three- and four-atomic cells at generalized tension is studied. A discrete-integral fracture criterion is proposed for normal rupture cracks when stress fields have a singular component, vectors of fields of stresses and deformations being collinear. When formulating the proposed criterion, we used the new rank of solutions, which differ from solutions applied in formulating the classical sufficient fracture criterion, in conformity with Novozhilov's hybrid model. The proposed criterion permits limiting passage to necessary criterion when energetic characteristics of postbuckling deformation of cells can be neglected within the limit. Values of critical loads obtained in conformity with the sufficient criterion essentially differ from those obtained in conformity with the necessary criterion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 75, Issue 5, March 2008, Pages 1099-1113
نویسندگان
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