کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7174976 | 1465600 | 2015 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A variational constitutive model for slip-twinning interactions in hcp metals: Application to single- and polycrystalline magnesium
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A variational constitutive model for slip-twinning interactions in hcp metals: Application to single- and polycrystalline magnesium A variational constitutive model for slip-twinning interactions in hcp metals: Application to single- and polycrystalline magnesium](/preview/png/7174976.png)
چکیده انگلیسی
We present a constitutive model for hcp metals which is based on variational constitutive updates of plastic slips and twin volume fractions and accounts for the related lattice reorientation mechanisms. The model is applied to single- and polycrystalline pure magnesium. We outline the finite-deformation plasticity model combining basal, pyramidal, and prismatic dislocation activity as well as a convexification-based approach for deformation twinning. A comparison with experimental data from single-crystal tension-compression experiments validates the model and serves for parameter identification. The extension to polycrystals via both Taylor-type modeling and finite element simulations shows a characteristic stress-strain response that agrees well with experimental observations for polycrystalline magnesium. The presented continuum model does not aim to represent the full details of individual twin-dislocation interactions; yet, it is sufficiently efficient to allow for finite element simulations while qualitatively capturing the underlying microstructural deformation mechanisms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 73, October 2015, Pages 39-61
Journal: International Journal of Plasticity - Volume 73, October 2015, Pages 39-61
نویسندگان
Yingrui Chang, Dennis M. Kochmann,