Recently we have seen many experimental data published on the static properties of the glass fabric reinforced plastics (F. R. P.), but there have been few reports so far which have treated the influence of environmental temperature and the glass content of the specimen.
It is intended in this paper to describe (the influence) of the glass content and the environmental temperature on the static behaviour of F. R. P. in which satin woven, plane woven and roving woven fablics are used for reinforcement. On the other hand we made analysis to predict the elastic moduli in flexure of composite laminates and determined their flexure strength by the use of these calculated moduli with the assumption that the F. R. P. materials will keep their elastic properties till the moment of fracture.