کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
797418 1467139 2009 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ductile-to-brittle transition in tensile failure of particle-reinforced metals
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Ductile-to-brittle transition in tensile failure of particle-reinforced metals
چکیده انگلیسی

We present an analytical micromechanical model designed to simulate the tensile stress–strain behaviour and failure of damaging composites containing a high volume fraction of reinforcing particles. One internal damage micromechanism is considered, namely particle fracture, which is assumed to obey a Weibull distribution. Final composite tensile failure occurs when one of two possible failure criteria is reached, given by (i) the onset of tensile instability, or (ii) an “avalanche-like” propagation of particle breaks to neighbouring particles. We show that an experimentally observed transition from failure by tensile instability to abrupt failure resulting from an increase of matrix strength can be mimicked by the model because local load-sharing (i.e. load transfer from a broken particle to its immediate neighbours) is accounted for.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanics and Physics of Solids - Volume 57, Issue 3, March 2009, Pages 473–499
نویسندگان
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