کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
780208 1465010 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Vibration analysis of delaminated Timoshenko beams under the motion of a constant amplitude point force traveling with uniform velocity
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Vibration analysis of delaminated Timoshenko beams under the motion of a constant amplitude point force traveling with uniform velocity
چکیده انگلیسی

A composite beam with single delamination traveled by a constant amplitude moving force is modeled accounting for the Poisson's effect, shear deformation and rotary inertia. The mechanical behavior between the delaminated surfaces is modeled using a piecewise-linear spring foundation. The governing differential equations of motion for such system are derived. Primarily, eigen-solution technique is used to obtain the natural frequencies and their corresponding mode shapes of such beam. Then, the Ritz method is employed to derive the dynamic response of the beam due to the moving force. The obtained results for the free and forced vibrations of beams are verified against reported similar results in the literatures. Moreover, the maximum dynamic response of such beam is compared with an intact beam. The effects of different parameters such as the force velocity, lamina ply angle, the single delamination size, its span-wise and/or thickness-wise location on the dynamic response of the beam are studied. The effects of delamination parameters on the force critical speed are studied.


► The Poisson's effect is considered in the dynamics of delaminated Timoshenko beam.
► The effects of delamination parameters on the beam's dynamic response are studied.
► The response is sensitive to the delamination's depth, length and spanwise location.
► The results have potential applications to non-destructive testing of structure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mechanical Sciences - Volume 70, May 2013, Pages 39–49
نویسندگان
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