کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
13451173 | 1844036 | 2020 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A modified scaling law for stiffness of nanoporous materials based on gyroid cell model
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Gibson-Ashby model can't well describe the experimental stiffness of nanoporous materials as the ligament size decreases to the nanoscale. We theoretically developed a refined continuum model based on a cubic, periodic arrangement of a gyroid unit cell with three-fold node connectivity. Our modified scaling law is given as E/Esâ¯=â¯C1Ïâ¯+â¯C2Ï2, where C1 and C2 account for the stretching and bending deformation mode, respectively. We found a good agreement between the simulation and theoretical calculations of the stiffness. We identified other morphological factors such as ligament aspect ratio and node to ligament volume ratio that affect the deformation behavior of the gyroid unit cell besides the relative density. A mixture of bending and stretching modes is observed in the gyroid unit cell under uniaxial tensile loading. We observed a transition from bending-stretching to stretching-dominant deformation by increasing the relative density of the gyroid unit cell.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mechanical Sciences - Volume 166, 15 January 2020, 105223
Journal: International Journal of Mechanical Sciences - Volume 166, 15 January 2020, 105223
نویسندگان
Haomin Liu, Niaz Abdolrahim,