کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5018318 1467044 2017 30 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microscopic and macroscopic instabilities in hyperelastic fiber composites
ترجمه فارسی عنوان
ناپایداری های میکروسکوپی و ماکروسکوپی در کامپوزیت های فیبر پرایمر
کلمات کلیدی
تغییر شکل محدود بی ثباتی، دوختن، کامپوزیت فیبر، ورقه ورقه ناپایداری میکروسکوپی، از دست دادن بیضوی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
In this paper, we study the interplay between macroscopic and microscopic instabilities in 3D periodic fiber reinforced composites undergoing large deformations. We employ the Bloch-Floquet analysis to determine the onset of microscopic instabilities for composites with hyperelastic constituents. We show that the primary mode of buckling in the fiber composites is determined by the volume fraction of fibers and the contrast between elastic moduli of fiber and matrix phases. We find that for composites with volume fraction of fibers exceeding a threshold value, which depends on elastic modulus contrast, the primary buckling mode corresponds to the long wave or macroscopic instability. However, composites with a lower amount of fibers experience microscopic instabilities corresponding to wavy or helical buckling shapes. Buckling modes and critical wavelengths are shown to be highly tunable by material composition. A comparison between the instability behavior of 3D fiber composites and laminates, subjected to uniaxial compression, reveals the significant differences in critical strains, wavelengths, and transition points from macro- to microscopic instabilities in these composites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanics and Physics of Solids - Volume 99, February 2017, Pages 471-482
نویسندگان
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