An Experimental Study on Dynamic Response for Delaminated Composite Beams Subjected to Axial Impact
含脱层损伤复合材料层合梁冲击动力响应实验研究

An experimental study on dynamic pulse response behavior of fiber reinforced plastic(FRP) beams with delaminations subjected to axial impact by moving mass is presented.The specimens were manufactured by unidirectional E-glass fiber fabric and epoxy resin with , and ply sequences and different initial imperfections.The delamination of beam was simulated by copper foils between designed plies.The data of bullet velocities and time history curves of strain were recorded respectively by laser setup,high dynamic strain indicator and TDS420A oscilloscope.The experimental results show that the ply sequences play a significant role in laminated composite material properties and delaminations have a significantly effect on dynamic pulse response of laminated beams.Moreover the initial imperfection is another important factor that can't be neglected.