Thermal stress study of solar PV module structure

The stress and strain distribution of elemental solar PV module structure after thermal cycles were analyzed using MSC.Marc common software. The results showed that the maximal normal stress of bonded layer occurred in midpoint of structure, the least normal stress in the two ends of structure; The maximal shear stress occurred in the two ends of structure, least shear stress occurred in the midpoint; The maximal normal stress of elemental structure occurred in polyimide film. The maximal shear stress of elemental structure occurred in silicone rubber between polyimide film and carbon-fiber composite; The maximal normal and shear stress of the structure in low temperature is far larger than maximal stress in high temperature; Both the maximum of the normal stress and the shear stress in elemental structure increased with the increase of thermal cycles.