Failure Mode Analysis of Carbon Fiber Composite Laminates by Acoustic Emission Signals

Composite laminates have complex failure modes. In order to investigate the evolution of in composite laminates, this paper performed an experimental study on four with different layups using acoustic emission (AE) technique. Two kinds defects are imposed including a hole and crack center. Tensile bending tests defective real-time AE signals collected. By analyzing spectrograms obtained integrating dispersion curves, modes for can be observed. The show that cause multiple modes, which change gradually during experiments. It is also revealed More specifically, stacking plies has greater impact occurrence delamination fiber fracture than matrix crack. tentative research shows there great potential improving performance by careful selection ply layups.