کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6703122 1428506 2018 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An efficient approach to investigate the post-buckling behaviors of sandwich structures
ترجمه فارسی عنوان
یک رویکرد کارآمد برای بررسی رفتارهای پس از انقباض ساختارهای ساندویچ
کلمات کلیدی
خم شدن پس از خم شدن، ساندویچ، روش عددی همبسته، شاخص دوچرخه،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
In this paper, we propose an efficient and accurate approach to investigate the post-buckling behavior of sandwich structures. In this framework, a novel one-dimensional layer-wise model using Euler-Bernoulli beam theory in the skins and higher-order kinematics in the core is proposed. The resulting nonlinear governing equations are then solved by the Asymptotic Numerical Method (ANM) with a bifurcation indicator, which is more reliable and efficient than the classical iterative methods, e.g., Newton-Raphson method, in terms of detecting critical points and computing bifurcated branches. Several numerical tests, i.e., global buckling, local wrinkling and global-local-coupling instability phenomena of sandwich beams, are performed and the results show that the proposed approach is able to efficiently and precisely characterize the critical loads and the post-buckling behaviors of sandwich structures. Finally, the effect of three aspects, i.e., kinematics, strain-displacement relationships and interpolation functions on the computational accuracy of predicting these instability phenomena are investigated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 201, 1 October 2018, Pages 377-388
نویسندگان
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