Bending analyses of 1D orthorhombic quasicrystal plates

作者：Sladek J^*; Sladek V; Pan E

来源：International Journal of Solids and Structures, 2013, 50(24): 3975-3983.

DOI：10.1016/j.ijsolstr.2013.08.006

• Local integral equations
• MLS approximation
• Phonon and phason displacement
• Orthorhombic quasicrystal

The meshless Petrov-Galerkin method (MLPG) is applied to plate bending analysis in 1D orthorhombic quasicrystals (QCs) under static and transient dynamic loads. The Bak and elasto-hydrodynamic models are applied for phason governing equation in the elastodynamic case. The phason displacement for the orthorhombic QC in the first-order shear deformation plate theory depends only on the in-plane coordinates on the mean plate surface. Nodal points are randomly distributed over the mean surface of the considered plate. Each node is the center of a circle surrounding this node. The coupled governing partial differential equations are satisfied in a weak-form on small fictitious subdomains. The spatial variations of the phonon and phason displacements are approximated by the moving least-squares (MLS) scheme. After performing the spatial MLS approximation, a system of ordinary differential equations (ODEs) for nodal unknowns is obtained. The system of the ODEs of the second order is solved by the Houbolt finite-difference scheme. Our numerical examples demonstrate clearly the effect of the coupling parameter on both static and dynamic phonon/phason deflections.

• 出版日期2013-11