Application of smart materials in energy harvesting and wave propagation
Ansari, Mohammad Hossein
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This work studies two main applications for smart materials; Energy harvesting and wave propagation. For the first application, we look at utilization of piezoelectric materials in generating electricity at small scale and from low frequency excitation. First, the energy harvesting at small scale for biomedical applications is studied. Two different novel configurations, one linear and one nonlinear, are proposed to achieve the goals for an energy harvester in implantable biomedical devices such as pacemakers. The goals include but not limited to satisfying the size limitations, MRI compatibility, sufficient power output, reliability, and robustness. The proposed devices are designed and optimized to convert the heartbeat vibrations to the electricity needed for conventional and modern leadless pacemakers. The energy harvesters are modeled and the electromechanical coupled equations are solved analytically. The results are verified using experimental test results.