Abstract
The health conditions of complicated concrete structures require intrinsic cement-based sensors with a fast sensing response and high accuracy. In this paper, static, modal, harmonic, and transient dynamic analyses for the 0–3 type piezoelectric cement-based material with interdigitated electrodes (IEPCM) wafer were investigated using the ANSYS finite element numerical approach. Optimal design of the IEPCM was further implemented with electrode distance (P), electrode width (W), and wafer density (H) as the main parameters. Analysis results show that the maximum stress and strain in the x-polarization direction of the IEPCM are 2.6 and 3.19 times higher than that in the y-direction, respectively; there exists no repetition frequency phenomenon for the IEPCM. These indicate 0–3 type IEPCM possesses good orthotropic features, and lateral driving capacity notwithstanding, a hysteresis effect exists. Allowing for the wafer width (Wp) of 1 mm, the optimal design of the IEPCM wafer arrives at the best physical values of H, W and P are 6.2, 0.73 and 1.02 mm respectively, whereas the corresponding optimal volume is 10.9 mm3.
Highlights
The health status of modern concrete infrastructures requires considerable intrinsic cement-based sensors for real-time monitoring [1,2,3]
The elastic stiffness coefficient matrix (c), dielectric constant dielectric constant matrix (ε) and piezoelectric stress constant matrix (e) of the IEPCM obtained by matrix (ε) and piezoelectric stress constant matrix (e) of the IEPCM obtained by using ANSYS can be using ANSYS can be correspondingly given as follows [21]
33 of IEPCM means the According to the series modelproperties, formula of the composite materials, we candget the dielectric constant piezoelectric of piezoelectric ceramic
Summary
The health status of modern concrete infrastructures requires considerable intrinsic cement-based sensors for real-time monitoring [1,2,3]. The 0–3 type PCM with IEs (IEPCM) can be regulated with almost the same durability, Young’s modulus and acoustic impedance as concrete structures, and it effectively makes up for the deficiencies and defects in the engineering application of the common piezoelectric element. We utilized ANSYS to simulate the sensing, driving, and orthotropic properties of the 0–3 type IEPCM, including static stress/strain, modal vibration, harmonic response and transient dynamic analysis. The final pitch at the center of the electrode (P), the electrode width (W), and the thickness (H) as the design variables for the optimal design of the IEPCM were investigated These studies effectively strengthen the piezoelectric sensing and or driving capacity mechanism of the 0–3 type IEPCM, and provide guidelines for future experimental design.
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