Experimental approaches to creep-induced damaging effects under normal ambient and transient moisture conditions in a GFR polymer composite
International Journal of Microstructure and Materials Properties
In this study some Damaging Effects induced by creep loading under normal ambient as well as transient moisture conditions i.e. by the so-called mechano-sorptive creep in a certain glass fibre-reinforced (GFR) polyester matrix composite are investigated by means of two basic types of experimental approaching techniques. The first type of these techniques was based on the influence of the creep-induced damaging effect on some relevant mechanical parameters such as elastic modulus and fracture
... lus and fracture stress, whereas the second type on the influence on a relevant physico-chemical parameter such as moisture diffusivity out of the material. By the above approaches it was shown that despite the non-neglecting scatter in the experimental data certain irresistible general trends might be assessed. In this context it was found that the damage "response" is markedly sensitive to the respective applied "detection" technique and therefore the damage evolution data obtained by these different techniques are not comparable. By comparison between the applied techniques it seems reasonable to assume that the "diffusional" technique due to its inherent microscopic mass transport processes in form of H 2 O molecules diffusion and therefore its ability to "detect" microstructural detects on a much lower scale can give a better approach to the damage accumulation phenomena.