https://doi.org/10.1140/epjp/s13360-022-03110-x
Regular Article
Electrical output characteristics of PDMS with different configurations attached to steel plate beam under low-speed loading
Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, 110159, Shenyang, China
a
tangenling@126.com
d
mzchang1990@126.com
Received:
10
April
2022
Accepted:
25
July
2022
Published online:
30
July
2022
As polydimethylsiloxane (polydimethylsiloxane, PDMS) can withstand large deformation mechanics and produce a good electrical response, PDMS has been widely applied in the field of soft sensing electronic components. Therefore, it is of great significance to study the electrical output characteristics of PDMS with different configurations attached to steel plate beams with different constraints under low-speed loading. In this paper, rectangular PDMS specimens with monolayer structure, interlayer bonded prism/cone structure and interlayer unbonded prism/cone structure were prepared to explore the electrical output characteristics and polarization strength of PDMS under low-speed loading. Based on experimental testing system of three-point bending and cantilever beam, the loading model of simply supported beam under the corresponding conditions of three-point bending and the mathematical model of Bernoulli–Euler beam with damping element were established. Combining numerical simulation of different PDMS with COMSOL Multiphysics software, the polarization law of PDMS under low-speed loading was clarified. The results show that: (1) the flexoelectric coefficients of PDMS in three-point bending are in range from 10−11 to 10−10 C/m2 under low-speed loading; (2) the flexoelectric coefficients of cantilever beam under low-speed loading of PDMS are μzzzz = 7.05 × 10−10 C/m2, μxxzz = 2.25 × 10−10 C/m2 and μyyzz = − 2.25 × 10−10 C/m2; (3) output voltage values of PDMS simply supported beam and cantilever beam are 1–4 mV and − 30–40 mV, respectively; (4) the maximum simulated polarization intensity of prism structural PDMS can reach 180 pC/m2, and the prismatic structure itself has strain gradient, which improves the electrical output performance of PDMS.
The original online version of this article was revised to change author name from Whang to Wang.
A correction to this article is available online at https://doi.org/10.1140/epjp/s13360-022-03138-z.
Copyright comment corrected publication 2022
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