عنوان مقاله [English]
The main focus of this article is to Analysis of Pressure Vessel Behaviour by Acoustic Emission Method and Ability of Experimental methods in Cylinder defects detection By Strain Measuring and obtaining the pressure limit FRP composite tanks.
In this Study, for performing experiments, first, the experimental set-up was prepared by installing emission acoustic sensors and strain gauges on the tank; then, the behavior of the Pressure Vessel was investigated by data of acoustic emission method and the strain gauge data were investigated. Observed that The studied composite tank was in the safe range at a pressure less than 2 bar and the mentioned tank leaks with holes up to 2mm did not high risk for destructive deformation & defect spread; if it has other operating conditions, it does not need to be monitored up to pressures above 5 bar where the strain ratio out of the linear phase and at higher pressures, other failure mechanisms, such as elastic-plastic deformation, cracking, etc are also added to the signals and should be studied and this means the need to monitor the tank at higher pressures or refuse to use it.
The result is that the acoustic signals are mostly produced by failure mechanisms. Experimentally based on the volume and characteristics of the signals and the obtained data showed that the acoustic emission activity in a non-defective cylinder is much lower compared to a defective cylinder. Usually, the signal increase at the beginning of the leak, and the leak is detectable.