TY  - EJOU
AU  - Sladek, J.  
AU  - Sladek, V.  
AU  - Solek, P.  

TI  - Elastic analysis in 3D anisotropic functionally graded solids by the MLPG
T2  - Computer Modeling in Engineering \& Sciences

PY  - 2009
VL  - 43
IS  - 3
SN  - 1526-1506

AB  - A meshless method based on the local Petrov-Galerkin approach is proposed for solution of static and elastodynamic problems in 3-D continuously non-homogeneous anisotropic bodies. Functionally graded materials (FGM) are multi-phase materials with the phase volume fractions varying gradually in space, in a pre-determined profile. The Heaviside step function is used as the test functions in the local weak form resulting into the derived local integral equations (LIEs). For transient elastodynamic problems either the Laplace transform or the time difference techniques are applied. Nodal points are randomly distributed in the 3D analyzed domain and each node is surrounded by a spherical subdomain to which a local integral equation is applied. The final form of the local integral equations has a pure contour character only in elastostatics. In elastodynamics an additional domain integral is involved due to inertia terms. The spatial variation of the displacement is approximated by the moving least-square (MLS) scheme.
KW  - meshless method
KW  -  local weak form
KW  -  Heaviside step function
KW  -  moving least squares interpolation
KW  -  Laplace transform
KW  -  Houbolt method

DO  - 10.3970/cmes.2009.043.223