Polymer composites are one of the most common materials in the use of industry and in everyday use. We measured influence of the orientation of the reinforcement in the composite made by two different technological methods of fabrication. In addition, how this effects viscoelastic behaviour of the material. Six different polymer composite samples reinforced by carbon fibres were studied in the four-point bend test. Three of the samples were made by the process of hand lay-up with vacuum bagging and the [0°]8, [(45°/0°)2]s and [±45°]8 orientation of the fibres. The other three samples were made by the autoclave method with pre-impregnated fibre with the same orientation of the fibres.
The results have showed us that the technological methods of fabrication and the orientation of reinforcement have influenced on the mechanical properties of material as well as on viscoelastic behaviour of material.