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In order to solve the transformation problem of BOM from engineering BOM to maintenance BOM for MRO system (MRO, Maintenance, Repair and Overhaul), a formal transformation model of BOM view is established. In this model, the intermediate component, inherit component, virtual component are defined on the specific maintenance management domain, and the transformation process from engineering BOM to...
In practical application of electro-mechanical impedance (EMI) technique, the monitored structure is constantly undergoing change due to external boundary conditions and the surrounding ambience. This change, in most cases, is considered to be normal and a part of the everyday use of the structure. The aim of this paper is to examine and obtain a better understanding of practical issues that are a...
Hydrogen blistering is one of the serious threats to safe operation of a Liquefied Natural Gas (LNG) tank, therefore safety analysis of hydrogen blistering defects is very important. In order to assess the reliability-based structural integrity of the LNG tank with defects of hydrogen blistering, the following steps were carried out. Firstly, Abaqus code, one of the Finite Element Method (FEM) software,...
An analytical description of the static characterization of a smart beam with surface-bonded piezoelectric transducers is developed in this paper. The uniform elastic beam is actuated by piezoelectric patches and modeled as an Euler-Bernoulli beam. The static analysis of the intelligent beam is then given in detail based on a transfer matrix method. Furthermore, the actuation mechanism of the piezoelectric...
The static response of an intelligent beam with surface-bonded piezoelectric patches is investigated in this paper. Timoshenko beam theory is employed to study the properties of beam-like structures bonded with multiple pairs of PZT patches. Here, only one-dimensional axial deformation of PZT wafers is considered. A shear lag model is adopted to simulate the interfacial bonding between PZT patches...
Nuss Orthopedic of Pectus Excavatum(PE) is a novel minimal invasive surgical technique for the treatment of PE, however, the surgery will fail as the Nuss bar is slipped or rotated. A 3D model for thorax is built according to the helical CT images of PE, the process of Nuss orthopedic was simulated by finite element analysis. The results show as the depressed sternum was jacking to normal position...
We show that by using the recently emerged transformation optics, it is possible to design perfect lenses in new geometries with an imaging performance almost equivalent to the well studied perfect slab lens. In addition, the theory of transformation optics generalizes the complementary bilayer lenses to many other material compositions, including cases where passive or active obstacles are involved...
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