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您的检索式：作者名="Denghui QIAN"
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| 1 | Electro-mechanical coupling wave propagating in a locally resonant piezoelectric/elastic phononic crystal nanobeam with surface effects显示文摘The model of a 'spring-mass' resonator periodically attached to a piezoelectric/elastic phononic crystal(PC) nanobeam with surface effects is proposed, and the corresponding calculation method of the band structures is formulized and displayed by introducing the Euler beam theory and the surface piezoelectricity theory to the plane wave expansion(PWE) method. In order to reveal the unique wave propagation characteristics of such a model, the band structures of locally resonant(LR) elastic PC Euler nanobeams with and without resonators, the band structures of LR piezoelectric PC Euler nanobeams with and without resonators, as well as the band structures of LR elastic/piezoelectric PC Euler nanobeams with resonators attached on PZT-4, with resonators attached on epoxy, and without resonators are compared. The results demonstrate that adding resonators indeed plays an active role in opening and widening band gaps. Moreover, the influence rules of different parameters on the band gaps of LR elastic/piezoelectric PC Euler nanobeams with resonators attached on epoxy are discussed, which will play an active role in the further realization of active control of wave propagations. | Denghui QIAN | 2020 | Applied Mathematics and Mechanics(English Edition)2020，41，3： | 5 |
| 2 | Dynamic Fracture of Ti-5553 Alloy in Taylor Impact Test显示文摘The dynamic fracture behavior of a new near-beta Ti-5Al-5Mo-5V-3Cr^(-1)Fe(Ti-5553)alloy under a high strain rate loading was investigated systemically using the Taylor impact test,over the impact velocity ranging from156 ms^(-1) to 256 ms^(-1).An optical microscope(OM)and a scanning electron microscope(SEM)were used to characterize the microstructure evolution.The experimental results have demonstrated that the velocity from deformation to fracture is 256 ms^(-1) for the alloy with anα+βduplex microstructure including more primaryαphase,while the velocity is 234 ms^(-1) for the alloy with a duplex microstructure including less primaryα phase.From the impact fracture morphologies,smooth and smeared surfaces and ductile dimple areas can be observed.The failure mode of the titanium alloy with both microstructures is adiabatic shear banding.According to the fracture analysis,the ductile fracture area with the dimple area in the alloy with much more primaryαphase were more than that with less primaryαphase.Compared to the duplex microstructure with less primaryα phase,Ti-5553 alloy with more primaryαphase exhibited a better capability to resist an adiabatic shear damage. | Denghui Zhao Qian Wang Lin Wang Maosheng Zhi | 2017 | Journal of Beijing Institute of Technology2017，26，1： | 0 |
| 3 | Flexural wave bandgap properties of phononic crystal beams with interval parameters显示文摘Uncertainties are unavoidable in practical engineering,and phononic crystals are no exception.In this paper,the uncertainties are treated as the interval parameters,and an interval phononic crystal beam model is established.A perturbation-based interval finite element method(P-IFEM)and an affine-based interval finite element method(A-IFEM)are proposed to study the dynamic response of this interval phononic crystal beam,based on which an interval vibration transmission analysis can be easily implemented and the safe bandgap can be defined.Finally,two numerical examples are investigated to demonstrate the effectiveness and accuracy of the P-IFEM and A-IFEM.Results show that the safe bandgap range may even decrease by 10%compared with the deterministic bandgap without considering the uncertainties. | Feiyang HE Zhiyu SHI Denghui QIAN Y.K.LU Yujia XIANG Xuelei FENG | 2023 | Applied Mathematics and Mechanics(English Edition)2023，44，2： | 0 |
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