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MECHANICAL BEHAVIOR AND VIBRATION ANALYSIS OF FIBER REINFORCED POLYMER COMPOSITE BEAMS USING NUMERICAL METHOD

NIGATU DESTA TILAHUN


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    <subfield code="a">composite, vibration, natural frequency, numerical, harmonically, resonance.</subfield>
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    <subfield code="a">Professor Hirpa G. Lemu</subfield>
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    <subfield code="a">&lt;p&gt;In this study, the free and forced vibration analysis of fiber reinforced plastic (FRP)&lt;br&gt;
composite beam using numerical method (finite element analysis) and mathematical&lt;br&gt;
modeling using MATLAB are conducted. Mechanical and physical properties of FRP&lt;br&gt;
are found using strength of material and semiempirical approach to get the equivalent&lt;br&gt;
of those properties. The beam is configured as cantilever with dimensions of&lt;br&gt;
191&amp;times;33&amp;times;5.66 mm3 for all analyses of vibrations. For modal analysis of vibrations&lt;br&gt;
different effects such as fiber volume ratio, fiber materials, angle of orientation, and&lt;br&gt;
stacking sequence of laminates are discussed. From these effects, stacking sequence of&lt;br&gt;
laminates is more effective in varying stiffness and natural frequencies with unique&lt;br&gt;
fiber volume ratio and same fiber material. Comparison of numerical and analytical&lt;br&gt;
solutions of natural frequencies are most approached except in mode 2 or bending&lt;br&gt;
mode in y axis. Forced vibration was carried out using the same configuration of beam&lt;br&gt;
as modal analysis, but with different stacking sequence of layers with harmonically&lt;br&gt;
exited loads. Results of resonance of vibration occur around the natural frequencies of&lt;br&gt;
composite.&lt;br&gt;
&amp;nbsp;&lt;/p&gt;</subfield>
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