Bending properties and failure behavior of 3D printed fiber reinforced resin T-beam

Fiber-reinforced resin T-beams have a wide range of applications. The forming of T-beams based on the fused deposition process provides a new method for its manufacture. This paper studied the key process parameters of 3D printing continuous fiber and short fiber reinforced resin T-beams. The results show that continuous fiber reinforced resin T-beams with similar fiber volume fractions have better bending performance than shorter fiber reinforced resin T-beams. When the printing layer thickness is 0.7 mm, 0.8 mm and 0.9 mm, the flexural strength and modulus of the continuous fiber reinforced resin T-beam are obviously lower with the increase of the layer thickness. Under the printing path 0 degrees, +/- 45 degrees, 90 degrees, the short fiber reinforced resin T-beam with the 0 degrees path has the highest flexural strength and modulus. Furthermore, T-beam with different printing path have significantly different bending failure behavior. The work provided a new approach to the production of beam structures of the actual engineering application.