کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
802881 1467490 2012 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Direct simulations of fiber network deformation and failure
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Direct simulations of fiber network deformation and failure
چکیده انگلیسی

A finite element model for 3D random fiber networks was constructed to simulate deformation and failure behavior of networks with dynamic bonding/debonding properties. Such fiber networks are ubiquitous among many living systems, soft matters, bio-materials, and engineering materials (papers and non-woven). A key feature of this new network model is the fiber–fiber interaction model that is based on AFM measurements from our earlier study. A series of simulations have been performed to investigate strain localization behavior, strength statistics, in particular, the variations of strength, strain-to-failure and elastic modulus, and their size dependence. Other variables investigated are fiber geometries. The result showed that, in spite of its disordered structure, strength and elastic modulus of a fiber network varied very little statistically, as long as the average number of fibers in the simulated specimen and the degree of fiber orientation are kept constant. However, strain-to-failure showed very significant statistical variations, and thus more sensitivity to the disordered structures.


► We present the model for the fibers interaction based on AFM measurements.
► We captured the failure mechanism of a wet wood fiber network.
► We demonstrated a large variation in strain to failure due to structural disorder.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics of Materials - Volume 51, August 2012, Pages 1–14
نویسندگان
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