کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4963822 1447411 2017 51 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Volumetric locking issue with uncertainty in the design of locally resonant acoustic metamaterials
ترجمه فارسی عنوان
مسئله قفل حجمی با عدم اطمینان در طراحی متاموماتهای صوتی موضعی رزونانس
کلمات کلیدی
قفل حجمی، متاموماتیک صوتی محلی رزونانس، تأثیر نااطمینانی، سفتی ملایم، مدل فاصله،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
In the design of locally resonant acoustic metamaterials (LRAMs), the incompressible rubber is widely used. However, the physical behavior of LRAMs with a ternary structure is very sensitive to the Poisson's ratio of incompressible rubber. The slight variance of Poisson's ratio could lead to a significant change of physical responses of LRAMs. On the other hand, the manufacturing error is unavoidable in the application of LRAMs. Therefore, it is important to predict the upper and lower bounds of physical responses of LRAMs with uncertainty parameters. For the first time, the mathematical model to predict the upper and lower bounds of mechanical response of LRAMs with uncertainty parameters such as Young's modulus, Poisson's ratio and density, is established by the nonlinear interval perturbation hybrid node-based smoothed finite element method (NIPH-NS/FEM). One of the main features of NIPH-NS/FEM with a softened effect in the discretized model is capable to overcome the volumetric locking issue of incompressible rubber in the standard finite element method (FEM). The accuracy and effectiveness of NIPH-NS/FEM have been validated by two numerical examples including LRAMs with binary and ternary structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 324, 1 September 2017, Pages 128-148
نویسندگان
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