Experimental Simultaneous Measurement of Ultrasonic Properties and Thickness for Defect Detection in Curved Polymer Samples

摘要: In the context of alternative energies, French Alternative Energies and Atomic Energy Commission (CEA) is developing hyperbaric tanks for onboard hydrogen storage applications. The aim these to increase operating life vehicles using as primary energy source. These are made a polymer layer surrounded by composite shell. shell structure that allows in mode, while acts barrier hydrogen. capacity enclose depends on thickness its physicochemical mechanical properties. Therefore, manufacturing process could be advantageously optimized proper measurement techniques allow estimating characteristics layer. method hereby presented aims study feasibility ultrasonic nondestructive evaluation liner A campaign was thus conducted 3.5 MHz transducers order realize mapping properties reservoir sample. measurements achieved analysis transmitted reflected echoes normal incidence. done sample with an artificial defect. Resolution enhanced through experimental configuration signal processing. Results agreement compared literature values defect detection discussed.