Mechanics and Computation / View source

for Analysis and Design of Materials and Structures for Attenuating Vibration and Acoustic Response

==Analysis and Design of Materials and Structures for Attenuating Vibration and Acoustic Response==

Gregory Hulbert, University of Michigan

The importance of designing structures with desired dynamic response characteristics is increasing, particularly in the ground vehicle industry. This is driven by customer demands for quiet vehicles and for well-tuned ride characteristics. In addition, safety requirements also are impacted by the dynamic response of materials, especially for military vehicles. Competing with these requirements is the continuing need to reduce the weight of vehicles to improve fuel economy. To this end, significant research has been directed towards the design of new composite materials.

The ability to design to design and manufacture materials with complex structure and novel material response offers the opportunity to consider the control of the dynamic response of structures using a multi-scale approach in which the material characteristics and material layout are considered as part of the structural analysis and design problem.
In this talk, three approaches towards the design of  materials and structures are presented and representative materials and structures are shown. In addition to material design employing Bragg scattering, the use of compliant mechanisms in sandwich structures is demonstrated. Lastly, inertial amplification is shown to provide a third method of inducing band-gap phenomena into materials and structures using embedded amplification mechanisms.

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