Damage Evolution of a Type IV Composite Pressure Vessel Based on High-Frequency Acoustic Emission Signals and Background-Energy Analysis
This study investigates damage evolution in a polymer-lined, fully wrapped Type IV composite pressure vessel containing artificial local defects under stepwise hydrostatic loading. A 70 MPa vessel was pressurized in 20 MPa increments to 160 MPa, while acoustic emission (AE) was monitored continuously. Ball-impact calib...