کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
498348 862988 2012 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An atomistic-based interphase zone model for crystalline solids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
An atomistic-based interphase zone model for crystalline solids
چکیده انگلیسی

In this paper, we present an atomistic-based interphase zone model (AIZM), discuss its physical foundation, and apply it to simulate fractures at small scales. The main technical ingredients of the atomistic-based multiscale finite element method are: (1) a colloidal crystal model to describe material interface degradation including slip planes, grain boundaries, cracks, and inhomogeneities; (2) implementation of the reduced integration and hour-glass model control technique to avoid locking inside the interphase element, and (3) introduction of a novel concept of “element stacking fault energy”, which can be utilized in simulations to distinguish ductile and brittle failures at small scales. In particular, AIZM provides an interface description that is consistent with the bulk material properties, and it can capture microstructure-based mixed-mode interfacial fracture automatically. The method may provide a mesoscale solution for polycrystalline solids by bridging the gap between fine scale molecular dynamics and macroscale continum dynamics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volumes 229–232, 1 July 2012, Pages 87–109
نویسندگان
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