منابع مشابه
Finite Element Modelling of 3-3 Piezocomposites
Efforts to improve the properties and reliability of piezoelectric materials have often concentrated on processing dense ceramic material by techniques such as fine particle size powder production, grain size control, hot pressing, hot isostatic pressing and controlled atmosphere sintering [1–3]. However, it has been shown that lowering the density and introducing significant amounts of open po...
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A 3-D finite element model is used to simulate water jet spot welding. The simulation is validated using the experimental data obtained by one of authors with other workers. The simulations identify parameters which correlate well with the quality of the welds produced. In particular the levels of equivalent plastic strain (PEEQ) and shear stress directions are shown to predict whether or not t...
متن کاملMultilevel finite element preconditioning for √3 refinement
We develop a BPX-type multilevel method for the numerical solution of second order elliptic equations in R using piecewise linear polynomials on a sequence of triangulations given by regular √ 3 refinement. A multilevel splitting of the finest grid space is obtained from the non-nested sequence of spaces on the coarser triangulations using prolongation operators based on simple averaging proced...
متن کاملOn the design of 1-3 piezocomposites using topology optimization
We use a topology optimization method to design 1-3 piezocomposites with optimal performance characteristics for hydrophone applications. The performance characteristics we focus on are the hydrostatic charge coefficient d spd h , the hydrophone figure of merit d spd h g spd h , and the electromechanical coupling factor k spd h . The piezocomposite consists of piezoelectric rods embedded in an ...
متن کامل3 Dimensional Structural Modelling of Segmental Tunnel Lining Using Finite Element Software
Closed-face shielded TBM driven tunnels are supported using precast concrete segmental linings. In the past these types of lining have been assessed without consideration being given to the coupling action along circumferential joints of adjacent rings or the true behaviour of joints along longitudinal joints, especially where these have a taper. The mechanical and geometrical characteristics o...
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ژورنال
عنوان ژورنال: Scripta Materialia
سال: 1999
ISSN: 1359-6462
DOI: 10.1016/s1359-6462(99)00249-3