Research on array ultrasonic field of cylindrical thick-walled composite

doi:10.19936/j.cnki.2096-8000.20260328.003

Abstract

Abstract: To clarify the ultrasonic field characteristics of phased array ultrasonic testing (PAUT) in carbon fiber reinforced plastics (CFRP) cylindrical thick-walled shells, numerical simulation was carried out based on CIVA and COMSOL software. A comprehensive ultrasonic model was established, accounting for curved surfaces, layered structure, and elastic anisotropy. Subsequently, the influence of the array aperture, preset focal depth and inspection positions from inner or outer R side was studied. Results indicate that as the aperture increased from 3 to 12, the focal extent increased. Specifically, the width of focal range increased by 12.9 mm and the actual focal depth increased from 0.3 mm to 13.2 mm at the preset focal depth of 27.5 mm. The influence of the preset focal depth on the width of focal range remained relatively weak, while its impact on the actual focal depth depended on aperture, becoming pronounced only under substantial number of elements. Additionally, the adverse effect from inspection positions of inner or outer R could be mitigated with the primary axis of PAUT probe aligning with the axial direction of cylinder. Finally, three delaminations with different depths were prepared and PAUT experiments were conducted to validate the typical simulated condition, and a good consistency was observed. The results are anticipated to serve as a valuable reference and technical guidance for nondestructive testing of the CFRP cylindrical thick-walled shells.

Key words: carbon fiber reinforced plastics (CFRP), cylinder, thick-wall, phased array ultrasonic testing (PAUT), ultrasonic field simulation

CLC Number:

TB332

LI Weiran, LI Yunpeng, LI Fengzhong, LUO Zhongbing, QU Ping, JIAO Huifeng. Research on array ultrasonic field of cylindrical thick-walled composite[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(3): 21-27.

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