Geometrically nonlinear dynamic analysis of multilayered organic solar cells with a non-classical plate theory and isogeometric anlysis

As the spacecraft enters and maneuvers within its celestial orbit, the photovoltaic structures inevitably experience severe dynamic loading. It is imperative to investigate the dynamic mechanical properties in space structure design, as this is a crucial metric for evaluating the capability against impulsive loads. This study embeds isogeometric analysis (IGA) within a non-classical refined shear deformation theory (RSDT) incorporating the modified couple stress theory (MCST) to capture size-dependent geometrically nonlinear dynamics of organic solar cells (OSCs). Various parameters such as boundary conditions, damping, and loading types are considered. Numerical results confirm convergence and accuracy against established benchmarks. Results demonstrate that the size effects significantly enhance stiffness and reduce deflection. The geometrically nonlinear model lowers vibration amplitudes and prolongs periods. Considering damping, the energy system has been effectively dissipated. In addition, safety verification confirms that ITO (indium tin oxide) layer strains remain below critical thresholds under extreme loads. A semi-empirical formula is established, enabling direct estimation of the allowable dynamic load before brittle failure.