Velocity measurements in polyetheretherketonehyphen;carbon fiber composite using excimer laser generated ultrasound

摘要

It is demonstrated that KrF laser ablation provides a suitable source for short pulse ultrasound generation in polyetheretherketone (PEEK)hyphen;carbon fiber composite. Measurements of plane wave velocities have been made on thin single laminae (sim;130 mgr;m thick) and multiple ply laminates of this anisotropic composite. Velocities for propagation at various angles with respect to the fiber axis have been measured and are shown to be in good agreement with theoretical calculations based on mechanical modulii.