Composite is a material composed of two or more component materials to obtain better
properties. 3-phase composite is usually added with reinforced fibers and particles. This report
presents an experimental study on the bending of some 3-phase composite plates for Vietnam’s
shipbuilding industry. The studied composite is made of polyester matrix, glass fiber and titanium
dioxide particle (TiO2). The numerical study, in which the interaction between the matrix and
particle is taken into account, shows good agreement with the experiment.