کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
251087 502921 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spectral finite element for wave propagation analysis of laminated composite curved beams using classical and first order shear deformation theories
ترجمه فارسی عنوان
عنصر محدود طیفی برای تجزیه و تحلیل انتشار موج پرتوهای منحنی کامپوزیتی با استفاده از نظریه های تغییر شکل پذیری برشی کلاسیک و مرتبه اول
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی

A frequency domain spectral finite element formulation is presented for the wave propagation analysis of laminated composite curved beams using the first order shear deformation theory (FSDT) and the classical laminate theory (CLT). The elements are derived from the exact solution of the governing equation of motion in frequency domain, obtained through Fourier transformation of the time domain equation. The formulation is validated by comparing the results for natural frequencies with the published results. The new elements are then employed to perform dispersion and wave propagation analyses of curved composite beams. The numerical results reveal that the wavenumbers predicted by the CLT show large deviation from those of the FSDT even for thin beams, and the deviation increases and occurs at lower frequencies with the increase in the thickness to radius ratio. The orthotropy ratio of the composite has a significant effect on the wavenumbers for tangential and mid-surface rotation modes. The wave propagation response predicted by the CLT differs widely from the FSDT prediction, for thin and thick, and shallow and deeply curved beams at both low and high frequencies. Thus, the CLT should not be used for wave propagation analysis of even thin curved laminated beams.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composite Structures - Volume 132, 15 November 2015, Pages 310–320
نویسندگان
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