کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5018460 1467431 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hygro-mechanical properties of paper fibrous networks through asymptotic homogenization and comparison with idealized models
ترجمه فارسی عنوان
خواص هیبرید-مکانیکی شبکه های کاغذی فیبرنوری از طریق همگن سازی همبستگی و مقایسه با مدل های ایده آل شده
کلمات کلیدی
کاغذ، شبکه فیبر، مدل های چند بعدی، همگن سازی همبستگی، خواص هیدرو مکانیکی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
This paper presents a multi-scale approach to predict the effective hygro-mechanical behaviour of paper sheets based on the properties of the underlying fibrous network. Despite the vast amount of literature on paper hygro-expansion, the functional dependence of the effective material properties on the micro-structural features remains yet unclear. In this work, a micro-structural model of the paper fibrous network is first developed by random deposition of the fibres within a planar region according to an orientation probability density function. Asymptotic homogenization is used to determine its effective properties numerically. Alternatively, two much more idealized micro-structural models are considered, one based on a periodic lattice structure with a regular network of perpendicular fibres and one based on the Voigt average. Despite their simplicity, they reproduce representative micro-structural features, such as the orientation anisotropy and network level hygro-elastic properties. These alternative models can be solved analytically, providing closed-form expressions that explicitly reveal the influence of the individual micro-scale parameters on the effective hygro-mechanical response. The trend predicted by the random network model is captured reasonably well by the two idealized models. The resulting hygro-mechanical properties are finally compared with experimental data reported in the literature, revealing an adequate quantitative agreement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics of Materials - Volume 108, May 2017, Pages 11-20
نویسندگان
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