Automated rapid assessment method and system for structural remaining life

Abstract

The invention relates to an automated rapid assessment method and system for structural remaining life. The structural health monitoring technology and automated nondestructive detection technology are combined to form a detection and assessment system taking their respective advantages, and the system conducts rapid quantitative detection on damaged of large area of aviation composite structure and automated evaluation on the structural remaining strength / life. The method and system not only can improve detection and maintenance efficiency of aviation structure, reduce downtime, but also can reduce the operating costs; in the invention, typical technologies used in structural health monitoring technology include but not limited to damage monitoring technique based on pressure sensor, and impact monitoring technology based on pressure sensor / optical fiber sensor; typical technologies used in the automated nondestructive detection technology include, but not limited to, automatic water spray ultrasonic C scan technology based on mechanical arm, and laser ultrasonic detection technology based on the mechanical arm.

Description

technical field [0001] The invention relates to the field of detection and maintenance, in particular to an automatic and rapid evaluation method and system for the remaining life of a structure. Background technique [0002] At present, the aircraft maintenance methods of domestic and foreign airlines still rely on regular non-destructive testing, such as ultrasonic scanning, eddy current testing, magnetic particle testing, etc. However, with the large-area use of advanced composite materials in the main load-bearing structures of civil aircraft, and large-area composite material structures are prone to damage such as delamination, debonding, and fiber breakage due to impact, fatigue, etc., traditional methods for metal structures The detection and maintenance methods of the system are facing severe challenges. How to quickly and accurately detect damage in large-area composite materials, improve the traditional maintenance process for metal structures, and promote the ext...

AI Technical Summary

Problems solved by technology

[0005] The automated non-destructive testing technology based on the robotic arm requires high-density scanning of the structural plane during the testing process. However, due to the large area of ​​the main load-bearing structure of composite materials, and usually only one or a few points are damaged, the mechanical arm does not affect the entire structure. Scanning appears unnecessary and inefficient

[0006] The structural health monitoring technology shows its high efficiency for the detection of large-scale composite material structures because it uses a relatively small number of sensors to obtain structural damage / impact; and from a quantitative point of view, the structural health monitoring technology The number of sensors limits its development, resulting in the inability to collect enough information to accurately quantify the damage size, shape and impact energy of the structure.

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