Dynamic pulse-buckling behavior of `quasi-ductileʹ carbon/epoxy and E-glass/epoxy laminated composite beams

Dynamic pulse-buckling response of carbon/epoxy and E-glass/epoxy laminated composite beams with [(±67.5)n]s ply sequence, subject to axial impact was investigated experimentally and numerically. The laminated beams deformed like ductile metals, retaining a residual deformed shape after being axially impacted, exhibiting no obvious delamination. The `crestʹ deflection of the beams was found to be linearly proportional to the impact energy. The numerical investigation showed that the beamsʹ top and bottom surfaces experienced stresses (transverse stress component) in excess of the tensile strength limits of the matrices.