Experimental analysis demonstrates voltage generation from embedded polyvinylidene fluoride films under vibratory loads, highlighting potential for vibration sensing and energy harvesting.
In this study, the role of thickness and excitation frequency has been investigated to capture the dynamic response of polyvinylidene fluoride (PVDF), emphasizing their uses to capture vibration sensitivity. The drop-casting approach has been adopted to synthesize the pristine films of PVDF. These films were then embedded in confined geomaterial subjected to vibratory loads. A mechanical shaking unit has been used to excite the films of varied thickness (0.02–0.1 mm) at a frequency range of 3–12 Hz. This excitation frequency has produced a voltage in the range of 1–8 V. A novel numerical model based on the solution of a second-degree non-homogenous differential equation has been developed to forecast the dynamic response of PVDF films. This numerical model would help to develop efficient piezoelectric sensors and energy harvesters with significant control. The deflections and stresses predicted using the numerical model for the PVDF excited at the selected set of frequencies were found in a range of 0.001–0.01 mm and 0.9–12 kPa, respectively. This work proposes a novel avenue for the future to analyse vibration from dynamic loading using PVDF. The findings would further encourage engineers and practitioners to develop piezoelectric materials for vibration control, smart construction materials, and energy harvesting.
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Kumar et al. (2024) studied this question.
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