Acta Mechanica Sinica

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Characterization of cuttlebone for a biomimetic design of cellular structures
Acta Mechanica Sinica - Tập 26 Số 1 - Trang 27-35 - 2010
Joseph Cadman, Shiwei Zhou, Yuhang Chen, Wei Li, Richard Appleyard, Qing Li
Multi-scale morphology analysis of acoustic emission signal and quantitative diagnosis for bearing fault
Acta Mechanica Sinica - Tập 32 - Trang 265-272 - 2015
Wen-Jing Wang, Ling-Li Cui, Dao-Yun Chen
Monitoring of potential bearing faults in operation is of critical importance to safe operation of high speed trains. One of the major challenges is how to differentiate relevant signals to operational conditions of bearings from noises emitted from the surrounding environment. In this work, we report a procedure for analyzing acoustic emission signals collected from rolling bearings for diagnosis...... hiện toàn bộ
Numerical computation of central crack growth in an active particle of electrodes influenced by multiple factors
Acta Mechanica Sinica - - 2018
Yuwei Zhang, Zhansheng Guo
Effect of microstructure on the hardening and softening behavIors of polycrystalline shape memory alloys Part I: Micromechanics constitutive modeling
Acta Mechanica Sinica - Tập 16 - Trang 309-324 - 2000
Song Guquan, Sun Qingping, Hwang Kehchih
The effects of microstructure and its evolution on the macroscopic superelastic stress-strain response of polycrystalline Shape Memory Alloy (SMA) are studied by a microstructure-based constitutive model developed in this paper. The model is established on the following basis: (1) the transformation conditions of the unconstrained single crystal SMA microdomain (to be distinguished from the bulk s...... hiện toàn bộ
Non-probabilistic information fusion technique for structural damage identification based on measured dynamic data with uncertainty
Acta Mechanica Sinica - Tập 29 - Trang 202-210 - 2013
Xiao-Jun Wang, Chen Yang, Zhi-Ping Qiu
Based on measured natural frequencies and acceleration responses, a non-probabilistic information fusion technique is proposed for the structural damage detection by adopting the set-membership identification (SMI) and two-step model updating procedure. Due to the insufficiency and uncertainty of information obtained from measurements, the uncertain problem of damage identification is addressed wi...... hiện toàn bộ
High pressure heat treatment tuning cavitation behavior in FeP metallic glass
Acta Mechanica Sinica - Tập 39 - Trang 1-10 - 2023
Yao Tang, Haofei Zhou
The origin of cavitation in brittle metallic glasses (MGs) is traced to the high degree of atomic density fluctuations. Purposely tuning the inherent structure to suppress cavitation has been a longstanding concern. Here we investigate the effect of high pressure heat treatment (HPHT) on the cavitation performance of a brittle Fe80P20 MG through molecular dynamics (MD) simulations. We found that H...... hiện toàn bộ
Rarefaction effects on hypersonic boundary-layer stability
Acta Mechanica Sinica - Tập 40 Số 3 - Trang 1-18 - 2024
Ou, Jihui, Wang, Chenyue, Chen, Jie
Near-space hypersonic vehicles could experience both continuous and rarefied flow regimes during the flight through atmosphere. The rarefaction effects on hypersonic boundary-layer stability are studied based on the Navier-Stokes (NS) equations and an improved NS model. The conventional linear stability theory (LST) is extended for rarefied shear flows by adopting slip boundary conditions and nonl...... hiện toàn bộ
Exact solutions for free vibration of transversely isotropic piezoelectric circular plates
Acta Mechanica Sinica - Tập 16 - Trang 141-147 - 2000
Ding Haojiang, Xu Rongqiao, Chen Weiqui
By employing the general solution for coupled three-dimensional equations of a transversely isotropic piezoelectric body, this paper investigates the free vibration of a circular plate made of piezoelectric material. Three-dimensional exact solutions are then obtained under two specified boundary conditions, which can be used for both axisymmetric and non-axisymmetric cases. Numerical results are ...... hiện toàn bộ
Effect of gauge corner lubrication on wheel/rail non-Hertzian contact and rail surface damage on the curves
Acta Mechanica Sinica - Tập 38 - Trang 1-17 - 2022
Yunfan Yang, Xinru Guo, Liang Ling, Kaiyun Wang, Wanming Zhai
Wheel/rail rolling contact is a highly nonlinear issue affected by the complicated operating environment (including adhesion conditions and motion attitude of train and track system), which is a fundamental topic for further insight into wheel/rail tread wear and rolling contact fatigue (RCF). The rail gauge corner lubrication (RGCL) devices have been installed on the metro outer rail to mitigate ...... hiện toàn bộ
Fractal geometry and fracture of rock
Acta Mechanica Sinica - Tập 4 - Trang 255-264 - 1988
Xie Heping, Chen Zhida
The irregular and rough profile of fracture surfaces of rock can be regarded as having self-similarity statistically. The authors apply a new geometry—fractal geometry to describe this irregularity. Fractal models of the transgranular fracture and the combined intergranular and transgranular fracture are established. The fractal character of fracture surface of rock is examined by electron scannin...... hiện toàn bộ
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