ArticleMaterials (Basel, Switzerland)2026
Damage Evolution of a Type IV Composite Pressure Vessel Based on High-Frequency Acoustic Emission Signals and Background-Energy Analysis.
Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
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 calibration established the relationship between input mechanical energy and AE waveform energy. Three high-frequency criteria based on waveform and band-limited energy ratios were used to identify fiber-fracture-related high-frequency signals, while ratios between adjacent background-energy characteristic points were used to identify background-energy oscillation (BEO). The calibration yielded a mechanical-to-AE energy conversion coefficient of 1.92354 × 10
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