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A modified couple stress theory is used to study the influence of a scale parameter in the free vibration of a Timoshenko functionally graded beam. For energy harvesting of micro devices, it is require for the beam to resonate at low frequencies. In order to minimize the free vibration frequency of the beam, differential evolution optimization is used to solve the optimization problem. To describe...
Differential evolution optimization is used to find the volume fraction that maximizes the first natural frequency for a functionally graded beam. A formulation using three parameters is used to describe volume fraction. Beams with different ratios of material properties are considered. Two methods are used to compute the natural frequencies, analytical and meshless numerical method. Results show...
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