کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7174882 1465589 2016 45 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An elastoviscoplastic model for porous single crystals at finite strains and its assessment based on unit cell simulations
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
An elastoviscoplastic model for porous single crystals at finite strains and its assessment based on unit cell simulations
چکیده انگلیسی
An elastoviscoplastic model is formulated at finite strains for porous single crystals. The model extends the yield function developed by Han et al. (2013) for porous single crystals at infinitesimal strains to finite strains, incorporating the evolution of void volume fraction and strain hardening of single crystal matrix. The model is assessed through three-dimensional unit cell finite element simulations based on periodic homogenisation and loading paths with prescribed constant stress triaxiality. The unit cell simulations are performed for face-centered cubic crystals with various crystallographic orientations, stress triaxialities and initial void volume fractions, showing the competitive influence of the stress triaxiality and the crystallographic orientation on the effective behaviour and the void volume evolution. The proposed model captures the hierarchy of porous single crystal responses with respect to crystal orientation and void volume fraction. It represents a remarkable compromise between description of unit cell behaviour and tractability in the computation of structural components.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 84, September 2016, Pages 58-87
نویسندگان
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