4BenatarA,Gutowshi T G.Ultrasonic welding of PEEK graphite APC-2 Composites[J].Polymer Engineering and Science,1989,29(23):1705-1721.
5Wang XL,Yan J C,Li R Q,et al.FEM investigation of the tem- perature field of energy director during ultrasonic welding of PEEK [J].Journal of Thermoplastic Composite Material,2006,19(9);593-607.