کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
770774 897572 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructural effects on ductile fracture in heterogeneous materials. Part II: Applications to cast aluminum microstructures
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Microstructural effects on ductile fracture in heterogeneous materials. Part II: Applications to cast aluminum microstructures
چکیده انگلیسی

This is the second of a two part paper aimed at investigating the effects of microstructural morphology, material properties and loading on rate-dependent ductile fracture of heterogeneous materials. The locally enhanced Voronoi cell finite element method (LE-VCFEM) is used for micromechanical analyses of deformation and failure in complex microstructural volume elements. The first part of this paper sequence evaluates the sensitivity of strain to failure of computer simulated microstructures to loading rate, microstructural morphology and material properties. In this second part, LE-VCFEM simulations of actual microstructures of a cast aluminum alloy micrograph are used to validate a strain to failure model developed in the first part. A method for identification of critical regions within a heterogeneous microstructure is also developed and validated using in-situ observations of a two-point bending test. The influence of applied strain rates on ductile fracture of micrograph-based complex microstructures is also investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 78, Issue 2, January 2011, Pages 226–233
نویسندگان
, ,