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【期刊论文】Stress waves in functionally gradient materials and its use for material characterization
韩旭, G.R. Liu*, X. Han, K.Y. Lam
G. R. Liu et al./Composites: Part B 30 (1999) 383-394,-0001,():
-1年11月30日
A method is presented to investigate elastic waves in functionally gradient material (FGM) plates excited by plane pressure wavelets. The FGM plate was first divided into linearly inhomogeneous elements (LIEs). A general solution for the equation of motion governing the LIE was derived. The general solution was then used together with the boundary and continuity conditions to obtain the displacement and stress in the frequency domain for an arbitrary FGM plate. The response of the plate to a pressure wavelet was obtained using Fourier transform techniques. Results obtained by the present method are compared with an existing method using homogeneous layer elements. Relationships between the surface displacement response and the material mechanical properties of FGM plates were also obtained. These relationships may be used for the material characterization of FGM plates. q1999 Elsevier Science Ltd. All rights reserved.
Functionally gradient materials, A., Layered structures, B., Elasticity, B., Mechanical properties
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【期刊论文】Transient waves in a functionally graded cylinder
韩旭, X. Han, G.R. Liu*, Z.C. Xi, K.Y. Lam
X. Han et al./International Journal of Solids and Structures 38 (2001) 3021-3037,-0001,():
-1年11月30日
A hybrid numerical method (HNM) is presented for analyzing transient waves in a cylinder made of functionally graded material (FGM). In the HNM, the FGM cylinder is divided into N cylindrical elements with three-nodal line in the wall thickness. The elemental material properties are assumed to vary linearly in the thickness direction to better modeol the spatial variation of material properties of FGM. The Hamilton variational principle is used to develop governing equations of the cylinder. The displacement responses are determined by employing the Fourier transfor-mations together with the modal analysis. The HNM is applied to analyze a number of FGM cylinder, and its effi-ciency is demolnstrated.
Graded cylinder, Transient waves, Hybrid numerical method
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韩旭
,-0001,():
-1年11月30日
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