Mechanical Behaviour Feature of 3D-Printed Reinforced Composites

This paper present the investigation of mechanical properties of 3D-printed composites. The effects of reinforcing on its tensile, flexural and splitting strength are presented together. It has been established that reinforcing changes mechanical behaviour of 3d-printed reinforced composites compared to non-reinforced references. The strength of 3d-printed reinforced composites increases by 2–2.5 times by using steel wire for their reinforcing. The 3d-printed reinforced composites had flexural strength 8–13 MPa, tensile strength 5.8–3.3 MPa. That is defined by the number of reinforcing steel wire in a layer. The greatest reinforcing effect is achieved in bending test. In this case it is possible to increase the strength of reinforced samples by 2.5–3 times compared to non-reinforced ones. Significant differences in the mechanical behaviour of 3D printed reinforced composites as compared to non-reinforced analogues were explained by the fact that reinforcing fibres were put to work. The tensile and flexural strength of 3DPRC samples increased in proportion to the increase in the number of fibres in the layer. The greatest increase in flexural strength up to 13 MPa was achieved for 3DPRC samples reinforced with 5 fibres when a force was applied across the boundary surface in the sample.