Characterization of continuous-fiber reinforced thermoplastics using thermoacoustically excited ultrasonic Lamb waves

Ultrasonic measurement techniques are widely used for non-destructive detection of material defects. However, material properties, such as Young's modulus, are still mostly determined destructively, especially for materials with high damping or strong anisotropy. One method for non-destructive material characterization creates and detects ultrasonic waves in plate-shaped specimens, so that the material's influence on wave propagation can be evaluated. In this contribution, we demonstrate the application of this method for fiber-reinforced plastics, identifying effective parameters for a homogeneous, orthotropic material model.