The Influence of Temperature on the Cyclic Properties of the Transversely Isotropic Nanocomposite System Under Kinematic Harmonic Loading

Abstract

A micromechanical model is developed to determine effective inelastic properties of nanocomposite under monoharmonic deformation by taking into account detailed micro-structural geometries and constitutive models of the constituents. By using the Correspondence Principle in Viscoelasticity and the modified Mori–Tanaka method, the effects of interface between inclusion and matrix is taken into account. By applying the presently developed model, a numerical analysis for determination of complex moduli for polymeric nanocomposite reinforced by nanofibers composed from carbon nanotubes (CNTs) is conducted at the isothermal conditions. Analysis of the complex moduli dependence on temperature and amplitude of strain intensity is performed. Composites reinforced with unidirectionally aligned nanofibers are considered. Results demonstrate a significant dependence of storage and loss moduli on the temperature within the wide range of it. The storage and loss moduli are found to increase monotonically with the increase of the nanofiber volume fraction while decrease with increasing temperature. The results show that the strength of material decreases with increasing temperature in elastic and inelastic regions and the inelastic behavior occurs at lower strain amplitude with increase of temperature.