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- W2467817400 abstract "Capacitors are common discrete components in electronics, including systems intended for operation in harsh environments. However, capacitance response due to the operating environment has not been well characterized in the literature. This work describes a technique to simultaneously evaluate the electrical and mechanical responses of capacitors subjected to dynamic mechanical loading by measuring capacitance through the calculation of the RC time constant. Printed circuit boards with surface mounted capacitors were subjected to moderate drop shocks using an accelerated drop tower. The capacitance was estimated at a frequency of 100 kHz during and after the impact, by applying a least squares fit to capacitor charge/discharge voltage measurements. Capacitance fluctuations post impact coincided with the board strain oscillations and were subsequently observed to decrease abruptly, which correlated with high speed imaging showing the onset of capacitor failure. The amount of change in capacitance was indicative of the total or partial flexural failure modes of floating electrode capacitors accounting for more than 90 % of breakdowns. The 6 % standard deviation accuracy of the technique did not allow for detection of piezoelectric response, suggesting that even at peak accelerations on the order of 24,000 g the mechanical mode of failure still dominates." @default.
- W2467817400 created "2016-07-22" @default.
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- W2467817400 date "2016-01-01" @default.
- W2467817400 modified "2023-09-23" @default.
- W2467817400 title "Measurement of the Electromechanical Response of Capacitors in Dynamic Loading Conditions" @default.
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- W2467817400 doi "https://doi.org/10.1007/978-3-319-22458-9_13" @default.
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