Characteristics of Acoustic Emission from Impact-Damaged CFRP Pressure Vessel during Pressurization Test (original) (raw)
This study examined the applicability of acoustic emission method for the impact damage evaluation of CFRP pressure vessels. AE signals were de tected during pressure proof tests of a CFRP pressure vessel before and after the impact test. The impact test was conducted by using a drop-weight impact tester. After the impact test, AE e vent rate during pressurization and pressure-holding period became higher compared to those detect e before the impact test. Frequency components of AE signals were also changed afte r the impact test. From these results, it is assumed that AE method can be used for the impact damage detection of CFRP pressure vessels. Furthermore, location of impact damage might b e estimated by AE method since most AE signals were first detected by the AE sensor near t he impact damage. Introduction Carbon Fiber Reinforced Plastic (CFRP) pressure vessels ar widely used for aerospace and automotive applications such as an accumulator for a s pace satellite and a hydroge...
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