کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1450448 | 988734 | 2006 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A dislocation density based constitutive model for crystal plasticity FEM including geometrically necessary dislocations
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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![عکس صفحه اول مقاله: A dislocation density based constitutive model for crystal plasticity FEM including geometrically necessary dislocations A dislocation density based constitutive model for crystal plasticity FEM including geometrically necessary dislocations](/preview/png/1450448.png)
چکیده انگلیسی
A dislocation density based constitutive model for face-centred cubic crystals is introduced and implemented into a crystal plasticity finite element framework. The approach assumes a homogeneous dislocation structure and tracks the dislocation evolution on each slip system. In addition to the statistically stored dislocations, the geometrically necessary dislocation density is introduced in order to consider strain gradients and thus render the model size sensitive. Furthermore, we develop a consistent algorithm for the updating of the geometrically necessary dislocation density. A simple shear experiment of an aluminium single crystal is used to calibrate the material parameters of the model and demonstrate its size sensitivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 54, Issue 8, May 2006, Pages 2169–2179
Journal: Acta Materialia - Volume 54, Issue 8, May 2006, Pages 2169–2179
نویسندگان
A. Ma, F. Roters, D. Raabe,