The static and dynamic analysis for the coupling hygro-electro-mechanical multifield problems via stabilized node-based smoothed radial point interpolation method

Abstract

In this article, the static and dynamic coupling hygro-electro-mechanical (CHEM) multifield problems of piezoelectric structures are investigated via stabilized node-based smoothed radial point interpolation method (SNS-RPIM). The basic equations for the CHEM problems are derived. And the static and dynamic responses are calculated by SNS-RPIM and finite element method. Through the numerical examples, the superiority of proposed method is also validated. These solutions also indicate that the increase of moisture concentration makes the model softer and decreases the structural stiffness when considering moisture dependence of the elastic coefficients, which also leads to the decrease of frequency and variation of displacement.