Ablation behaviors of carbon reinforced polymer composites by laser of different operation modes

Abstract

a b s t r a c tLaser ablation mechanism of Carbon Fiber Reinforced Polymer (CFRP) composite is of critical meaning for the laser machining process. The ablation behaviors are investigated on the CFRP laminates subject to continuous wave, long duration pulsed wave and short duration pulsed wave lasers. Distinctive ablation phenomena have been observed and the effects of laser operation modes are discussed. The typical temperature patterns resulted from laser irradiation are computed by finite element analysis and thereby the different ablation mechanisms are interpreted.

Interaction between pulsed infrared laser and carbon fiber reinforced polymer composite laminates

“…surface fabric layer without obvious change to the main body of the laminate [4]. The interaction between the long pulse Laser and the CFRP composite laminates is further investigated in the present work to reveal the drilling procedure of the specimens by the pulsed infrared wave Laser of duration about 200ns.…”

“…The axial symmetry Finite Element model was set up as shown in Fig. 2 to investigate preliminarily the temperature and phase change of the CEFP specimens under long pulse Laser irradiation by solving the classic heat conduction with considering phase change of the involved materials [4], that is…”

“…Laser machining is promisingly attractive in the processing of the carbon fiber reinforced polymer (CFRP) composites considering its potential advantages over the mechanical techniques [1,2,3]. As we know, the efficiency and reliability of Laser machining is determined by the interactions between the Laser beam and the processed materials [4]. To improve the quality of Laser machining in the composites, the heat affected zone and taper angle need to be controlled by particularly designing the Laser parameters [1,2].…”

“…Previously, the different ablation behaviors were investigated on the CFRP laminates subject to Laser of typical operation modes, i.e. continuous wave, long duration pulsed wave and short duration pulsed [4]. It was found that the continuous wave Laser made constant ablation of epoxy matrix over several layers and, the long duration pulse wave Laser made conical hole through the total laminate thickness in comparison to that the short duration pulsed wave Laser only made ablation of the…”

High-power laser resistance of filled sandwich panel with truss core: An experimental study

“…The failure mode is dependent on laser powers, material properties, structural features and environmental parameters. The thermal deformation induced by the thermal stress through non-uniform temperature distribution is the main failure mode of structures under low-power CW laser irradiation [19]. The laser also reduces the stiffness and strength of a target when temperature is below the melting point of a material [20].…”