15 April 2016 In vacuo elastodynamics of a flexible cantilever for wideband energy harvesting
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We explore the potential for bandwidth enhancement by merely exploiting the hardening nonlinearity of a flexible cantilever. To date, this cubic hardening behavior has been minor due to dissipative effects, especially fluid drag. The goal here is to minimize the fluid damping and thereby achieve the jump phenomenon. A vacuum setup that is compatible with the armature of a long-stroke shaker is employed. Experiments are conducted for a range of air pressure and base excitation levels. The overall nonlinear non-conservative elastodynamics of the cantilever is also modeled and experimentally validated by empirically accounting for fluid damping.
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D. Tan, D. Tan, A. Erturk, A. Erturk, "In vacuo elastodynamics of a flexible cantilever for wideband energy harvesting", Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 979904 (15 April 2016); doi: 10.1117/12.2219391; https://doi.org/10.1117/12.2219391

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