کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
804085 | 1467820 | 2010 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Prefracture zones in quasibrittle materials with branched and kinked cracks
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Prefracture zones in quasibrittle materials with branched and kinked cracks Prefracture zones in quasibrittle materials with branched and kinked cracks](/preview/png/804085.png)
چکیده انگلیسی
The paper is concerned with regularly structured solids. A two-stage solution is proposed for the nonlinear problem of fracture mechanics where branching or kinking of an initial mixed-mode crack is possible. First, the kink and branch angles are found, and then the critical fracture parameters for chosen directions are determined; in so doing, necessary and sufficient fracture criteria of the Neuber-Novozhilov type are used respectively. The critical fracture parameters (the lengths of prefracture and loads) are found with a modified version of the classical Leonov-Panasyuk-Dugdale model for prefracture zones confined in rectangles along crack branches. Simple expressions for the critical fracture parameters are derived using stress intensity factors for cracks with infinitesimal branches and for those with a branch on which normal and shear stress simulative of the plastic zone are specified. The stress intensity factors for a branched crack are obtained from solving the problem of uniaxial tension of a plate with a double-symmetric crack branch by the finite-element method. The stress intensity factors are calculated for mode I and II cracks in relation to the branch angle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physical Mesomechanics - Volume 13, Issues 1â2, JanuaryâApril 2010, Pages 54-61
Journal: Physical Mesomechanics - Volume 13, Issues 1â2, JanuaryâApril 2010, Pages 54-61
نویسندگان
V.M. Kornev, V.D. Kurguzov,