The static behaviors study of magneto-electro-elastic materials under hygrothermal environment with multi-physical cell-based smoothed finite element method

Li, Ming; Liu, Mingrui; Zhou, Liming

doi:10.1016/j.compscitech.2020.108130

Cited by 25 publications

(6 citation statements)

References 60 publications

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“…Sensing pads by M1 with effective axial-length of 200 μm (inner diameter of 200 μm and outer one of 400 μm) give each quadrant effective sensing area of 7500 μm 2 . Compared to 150 μm effective diameter of the actuating electrode, the effective quadrant area shrinks to 2343.75 μm 2 , almost a quarter of the sensing pad. Finally, the finite calibration electrodes are designed to finetune the large proof-mass mismatch-balancing from the fabrication processes by applying certain electro-static forces respectively.…”

Section: Design Conceptmentioning

confidence: 97%

“…Traditional CMOS-based inertial sensors have been extensively investigated [1]. However, the efforts to overcome design limitations were focussed on the intelligent composite materials or the process adjusting techniques, and the device performances might be improved [2][3][4]. Application-specific integrated circuits (ASICs) exploiting standard CMOS process and in-house post-processing are popular in MEMS industry, in pursuing higher integration for versatile applications [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Novel pure‐metal tri‐axis CMOS‐MEMS accelerometer design and implementation

Wen

Fang

2021

Micro & Nano Letters

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This work proposed a pure-metal, single-proof-mass structure fabricated by the standard 0.18 μm one-poly-silicon six-metal (1P6M) CMOS process along with one inhouse post-CMOS wet-etching approach. The implemented state-of-the-art symmetrical tri-axis accelerometer consists of the disk-like mezzanine proof-mass and four diagonal double-layered springs. Three sets of the addressable quadrant electrodes underneath the proof-mass with additional interlayer inter-digital comb-conductors help to fulfil the high sensibilities of 248.6, 250.8, and 220.1 mV/G for the x-, y-, and z-axes, respectively. Symmetrical-structure and addressable-electrode design of the device also effectively eliminates the cross-coupling effects. The thin-film composite springs can be width-trimmed for the necessities of specification changes, and the optional calibration pads also provide the on-chip accuracy compensations. The fabricated tri-axis accelerometer reveals stable and consistent results and exemplifies a potential platform design for the highly integrated monolithic CMOS-MEMS system-on-chip applications.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Design Conceptmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Novel pure‐metal tri‐axis CMOS‐MEMS accelerometer design and implementation

Wen

Fang

2021

Micro & Nano Letters

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“…Later on, the combination of strain/gradient smoothing and FEM is named smoothed FEM (SFEM). 54 SFEMs can be classified into different types based on the distinct constructions of SDs, for example, cell-based SFEM (CS-FEM), [58][59][60][61][62][63][64][65][66][67][68][69][70][71][72] node-based SFEM (NS-FEM), [73][74][75][76][77][78][79][80][81] edge-based SFEM (ES-FEM), [82][83][84][85][86][87][88][89] face-based SFEM, [88][89][90][91] 𝛼FEM, [92][93][94] 𝛽FEM, 95,96 and selective SFEM. [97][98][99][100] Different constructions of SDs lead to different extents of softening.…”

Section: Introductionmentioning

confidence: 99%

Preconditioned smoothed numerical manifold methods with unfitted meshes

Liu,

Guan,

Tong

et al. 2023

Numerical Meth Engineering

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The numerical manifold method (NMM) has been widely utilized to solve problems involving complicated boundaries, cracks, and interfaces. Recently, strain or gradient smoothing techniques have been incorporated into NMM to improve its performance. The resulting smoothed NMMs (SNMMs) normally possess enhanced numerical properties, for example, higher accuracy, convergence, and efficiency. A challenging issue rooted in NMM and other enhanced finite element methods using unfitted meshes is the ill‐conditioning induced by extremely small cut element. In this study, we investigate the behaviors of SNMMs in the case of small cut element. It is demonstrated that the cut‐induced ill‐conditionings also exist for two types of SNMMs, namely, edge‐based SNMM and physical‐patch‐based SNMM. Furthermore, a preconditioner based on the normalization of basis functions is proposed to resolve the ill‐conditioning. Several benchmark problems demonstrate the performances of SNMMs regarding accuracy, convergence, and stability.

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“…Such models include the high-precision lumped parameter model, 26 finite element method multimode analytical model, 27 unimode cantilever enclosed frequency-varying functional model, 8 disorderly loosely-coupled resonator model, 28 nonlinear model based on Hamilton’s principle 29 and its electromechanical coupling dynamic model, 30 and shearing piezoelectric cantilever electromechanical coupling model. 31 In particular, for nonlinear processes in which different geometric features, material constructions, and damping are considered, the strain gradient theory, 32 Timoshenko model, 33,34 and Hamiltonian principle 35,36 are effective in analyzing free vibration, bending, and electric potential effects, 37,38 thermal effects, 39 humidity, 40 and multiphysics loads 41 on sandwich transducers. Further, under varying geometric features, 42 material composition, 43 and additional damping, 44 studies on the nonlinear motion processes have demonstrated the effectiveness of this method.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric generator with nonlinear structure

Wang

Liu

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

Self Cite

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Motion in nature is usually a low-frequency vibration such as walking, running, swinging arms, and so on, but traditional piezoelectric cantilever structures are inefficient at harvesting energy from low-frequency vibrations. T in the environment. To overcome this, a novel piezoelectric generator was designed. A cantilevered bimorph with a tip mass and a pair of preloading springs were fixed on its base to form a nonlinear piezoelectric generator. The energy transmission in the structure was analyzed. The harvester was modeled as a Euler–Bernoulli beam, and the piezoelectric material was assumed to be linear. The bending vibration was calculated using the Rayleigh–Ritz procedure, and the frequency characteristics of the output voltage were analyzed under different preloading distances. It was found that changing the preloading of the spring helped reduce the natural frequency of the cantilever, which facilitated conversion of ambient low-frequency vibrations into electrical energy. Then, the characteristics of low frequency energy harvesting were investigated experimentally. The theoretical results were consistent with the experimental data; moreover, the resonance frequency, which changes with the preloading distance, reduced from 43 to 35 Hz when the preloading distance was increased from 0 to 1 mm. In this paper, an effective structure to control the resonant frequency is proposed and its motion equation stated. The structure has potential for applications in predicting the effect of preloading distance on resonance frequency.

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The static behaviors study of magneto-electro-elastic materials under hygrothermal environment with multi-physical cell-based smoothed finite element method

Cited by 25 publications

References 60 publications

Novel pure‐metal tri‐axis CMOS‐MEMS accelerometer design and implementation

Novel pure‐metal tri‐axis CMOS‐MEMS accelerometer design and implementation

Preconditioned smoothed numerical manifold methods with unfitted meshes

Piezoelectric generator with nonlinear structure

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