Creep behavior analytical modeling

To gain a better understanding of the creep behavior of fiber-reinforced ceramics, a simple 1-D analytical approach will be used to examine the effects of constituent behavior on composite creep deformation and changes in internal stress. Since the derivation of the model provides valuable insight into the parameters that influence composite creep behavior, the derivation of the 1-D concentric cylinder model will be outlined first. [Pg.165]

Although analytical models are very effective tools for understanding how changes in the elastic and creep behavior of the constituents of a composite influence overall creep behavior, one must not blindly assume that accurate predictions of composite creep behavior can be obtained based upon creep experiments conducted on the individual constituents. For instance, even if a monolithic ceramic and a composite were processed under identical conditions, the fracture and creep behavior of the monolithic ceramic may be... [Pg.182]

A comprehensive analytical model for predicting long term durability of resins and of fibre reinforced plastics (FRP) taking into account viscoelastic/viscoplastic creep, hygrothermal effects and the effects of physical and chemical aging on polymer response has been presented. An analytical tool consisting of a specialized test-bed finite element code, NOVA-3D, was used for the solution of complex stress analysis problems, including interactions between non-linear material constitutive behavior and environmental effects. [Pg.366]