Application of the MLPG to thermo-piezoelectricity

作者：Sladek J^*; Sladek V; Zhang Ch; Solek P

来源：Computer Modeling in Engineering & Sciences, 2007, 22(3): 217-233.

• meshless local Petrov-Galerkin method (MLPG)
• moving least-squares interpolation
• piezoelectric solids
• orthotropic properties
• transient thermal load
• laplace-transform

A meshless method based on the local Petrov-Galerkin approach is proposed for the solution of boundary value problems for coupled thermo-electro-mechanical fields. Transient dynamic governing equations are considered here. To eliminate the time-dependence in these equations, the Laplace-transform technique is applied. Material properties of piezoelectric materials are influenced by a thermal field. It is leading to an induced nonhomogeneity and the governing equations are more complicated than in a homogeneous counterpart. Two-dimensional analyzed domain is subdivided into small circular subdomains surrounding nodes randomly spread over the whole domain. A unit step function is used as the test functions in the local weak-form. The derived local integral equations (LIEs) have boundary-domain integral form. The moving least-squares (MLS) method is adopted for the approximation of the physical quantities in the LIEs. The Stehfest's inversion method is applied to obtain the final time-dependent solutions.

• 出版日期2007-12