The CF/PEKK composites were manufactured from unidirectional (UD) prepregs using heated press following supplier's specifications . The CF/epoxy laminates (manufactured with T700S/2592 UD prepregs) were provided by Shenzhen Jinjiuyi Electronic Technology Co., Ltd, China. Both composites were 3 mm in thickness and consist of 22 plies to form a cross-ply stacking sequence. The composite laminates were cut by water jet into 120 mm square workpiece. Both composites contains 60 vol% carbon fibre of the same grade with modulus of elasticity and tensile strength of 240 and 4.8 GPa, respectively.